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Reilly PT, van Eps A, Stefanovski D, Pfau T. The influence of different horseshoes and ground substrates on mid-stance hoof orientation at the walk. Equine Vet J 2024; 56:598-606. [PMID: 37589397 DOI: 10.1111/evj.13990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 07/27/2023] [Indexed: 08/18/2023]
Abstract
BACKGROUND Horseshoes with modified contact surfaces combined with deformable ground substrates are used to change hoof orientation during mid-stance, for example, for therapeutic reasons. OBJECTIVES To measure the effect of horseshoes and ground substrates on sagittal and transverse plane hoof orientation at mid-stance using a dorsal hoof wall mounted triaxial accelerometer. STUDY DESIGN In vivo experiment, randomised crossover design. METHODS Differences in sagittal and transverse plane angles between standing and mid-stance of the left front hoof of six horses walking with regular horseshoes, egg bar, toe-wide, medial-wide, lateral-wide and three-degree egg bar shoes on turf, sand and hard ground substrates were assessed with linear mixed models with horseshoe and substrate type as fixed factors (p < 0.05) for each animal. RESULTS Hoof angles were significantly affected by horseshoe (p < 0.001), surface (p < 0.001) and the combination (p < 0.001). The sagittal plane angle increased in deformable ground substrates at walk-in mid-stance on turf [mean (±standard deviation): 2.6° (±3.8°)] and on sand [2.6° (±4.1°)] across all shoes. The greatest increase was observed with egg bar shoes [turf: 4.37° (±3.82°); sand 4.69° (±3.83°)]. There was a tendency for the hoof to sink laterally into deformable ground substrates among all shoes [turf: 1.11° (±1.49°); sand: 0.93° (±1.93°)]. Medial-wide shoes increased the lateral sinking [turf: 2.00° (±1.63°); sand: 1.79° (±1.58°)]. Lateral-wide shoes reduced the lateral sinking on turf [0.62° (±1.26°)] and induced a marginal medial sinking on sand [-0.007° (±2.03°)]. MAIN LIMITATIONS The substrate properties were not quantitatively assessed, and observations were limited to front hooves at the walk. A larger sample size would be preferable. CONCLUSIONS Mid-stance hoof orientation changes with specific combinations of shoes and ground substrates in the walking horse.
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Affiliation(s)
- Patrick T Reilly
- Department of Clinical Sciences, New Bolton Center, University of Pennsylvania, Kennett \Square, Pennsylvania, USA
| | - Andrew van Eps
- Department of Clinical Sciences, New Bolton Center, University of Pennsylvania, Kennett \Square, Pennsylvania, USA
| | - Darko Stefanovski
- Department of Clinical Sciences, New Bolton Center, University of Pennsylvania, Kennett \Square, Pennsylvania, USA
| | - Thilo Pfau
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
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Yousef AT, Hussein MK, Hamed MA, Farrag F, Abumandour M, Hamoda H. Morphological and radiographic studies on the Manus region in the Arabian one-humped camel (Camelus dromedaries). Anat Histol Embryol 2024; 53:e13040. [PMID: 38623947 DOI: 10.1111/ahe.13040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 02/16/2024] [Accepted: 03/24/2024] [Indexed: 04/17/2024]
Abstract
The study aims to analyse the normal anatomical and radiographical features of the Manus of the southern Aswanian-adapted Arabian one-humped camel, providing crucial data for diagnosing and treating various ailments. Our study was applied to 10 cadaver forelimbs of adult male one-humped camels (4-5 years old) for an explanation of the gross anatomy of the bones of the Manus region from under the carpal bones by using traditional techniques, including the gross anatomical, radiographic and x-ray (at the dorsopalmar and lateral planes) of the preparation of Manus bones. Our results showed that the large fused (third and fourth) metacarpal bones, in which the fusion extended along the entire length of the bone except at the distal end, diverged to form separate articulations with cross-ponding digits. As described in all ruminant species, especially the camel, there were two digits, and each digit consisted of three phalanges and two proximal sesamoid bones. Our radiographic x-ray data revealed that the complete radiopaque septum that completely divided the medullary cavity into two separate parts was clear from the dorsopalmar view, while the lateral view showed the proximal sesamoid bones that were placed over each other and located palmar to the head of the large metacarpal bone. In conclusion, our study reveals the adaptations of the Arabian one-humped camel to Egyptian conditions, aiding in the early diagnosis of lameness and digit problems and enabling veterinarians and camel owners to better address these issues, thereby improving the overall health and well-being of these animals.
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Affiliation(s)
- Abanoub T Yousef
- Department of Anatomy and Embryology, Faculty of Veterinary, Medicine, Aswan University, Aswan, Egypt
| | - Mohamed K Hussein
- Department of Food Hygiene, Faculty of Veterinary Medicine, Aswan University, Aswan, Egypt
| | - Mohamed A Hamed
- Department of surgery, Anesthesiology, and Radiology, Faculty of Veterinary Medicine, Aswan University, Aswan, Egypt
| | - Foad Farrag
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
- Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Delta University for Science and Technology, Dakahlia, Egypt
| | - Mohamed Abumandour
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Hazem Hamoda
- Department of Anatomy and Embryology, Faculty of Veterinary, Medicine, Aswan University, Aswan, Egypt
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3
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Caine S, Alaverdashvili M, Colbourne F, Muir GD, Paterson PG. A modified rehabilitation paradigm bilaterally increased rat extensor digitorum communis muscle size but did not improve forelimb function after stroke. PLoS One 2024; 19:e0302008. [PMID: 38603768 PMCID: PMC11008896 DOI: 10.1371/journal.pone.0302008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 03/26/2024] [Indexed: 04/13/2024] Open
Abstract
Malnutrition after stroke may lessen the beneficial effects of rehabilitation on motor recovery through influences on both brain and skeletal muscle. Enriched rehabilitation (ER), a combination of environmental enrichment and forelimb reaching practice, is used preclinically to study recovery of skilled reaching after stroke. However, the chronic food restriction typically used to motivate engagement in reaching practice is a barrier to using ER to investigate interactions between nutritional status and rehabilitation. Thus, our objectives were to determine if a modified ER program comprised of environmental enrichment and skilled reaching practice motivated by a short fast would enhance post-stroke forelimb motor recovery and preserve forelimb muscle size and metabolic fiber type, relative to a group exposed to stroke without ER. At one week after photothrombotic cortical stroke, male, Sprague-Dawley rats were assigned to modified ER or standard care for 2 weeks. Forelimb recovery was assessed in the Montoya staircase and cylinder task before stroke and on days 5-6, 22-23, and 33-34 after stroke. ER failed to improve forelimb function in either task (p > 0.05). Atrophy of extensor digitorum communis (EDC) and triceps brachii long head (TBL) muscles was not evident in the stroke-targeted forelimb on day 35, but the area occupied by hybrid fibers was increased in the EDC muscle (p = 0.038). ER bilaterally increased EDC (p = 0.046), but not TBL, muscle size; EDC muscle fiber type was unchanged by ER. While the modified ER did not promote forelimb motor recovery, it does appear to have utility for studying the role of skeletal muscle plasticity in post-stroke recovery.
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Affiliation(s)
- Sally Caine
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Canada
| | | | - Frederick Colbourne
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
- Department of Psychology, University of Alberta, Edmonton, Canada
| | - Gillian D. Muir
- Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Phyllis G. Paterson
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Canada
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Yu J, Joo IL, Bazzigaluppi P, Koletar MM, Cherin E, Stanisz AG, Graham JWC, Demore C, Stefanovic B. Micro-ultrasound based characterization of cerebrovasculature following focal ischemic stroke and upon short-term rehabilitation. J Cereb Blood Flow Metab 2024; 44:461-476. [PMID: 37974304 PMCID: PMC10981404 DOI: 10.1177/0271678x231215004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 08/21/2023] [Accepted: 10/27/2023] [Indexed: 11/19/2023]
Abstract
Notwithstanding recanalization treatments in the acute stage of stroke, many survivors suffer long-term impairments. Physical rehabilitation is the only widely available strategy for chronic-stage recovery, but its optimization is hindered by limited understanding of its effects on brain structure and function. Using micro-ultrasound, behavioral testing, and electrophysiology, we investigated the impact of skilled reaching rehabilitation on cerebral hemodynamics, motor function, and neuronal activity in a rat model of focal ischemic stroke. A 50 MHz micro-ultrasound transducer and intracortical electrophysiology were utilized to characterize neurovascular changes three weeks following focal ischemia elicited by endothelin-1 injection into the sensorimotor cortex. Sprague-Dawley rats were rehabilitated through tray reaching, and their fine skilled reaching was assessed via the Montoya staircase. Focal ischemia led to a sustained deficit in forelimb reaching; and increased tortuosity of the penetrating vessels in the perilesional cortex; with no lateralization of spontaneous neuronal activity. Rehabilitation improved skilled reaching; decreased cortical vascularity; was associated with elevated peri- vs. contralesional hypercapnia-induced flow homogenization and increased perilesional spontaneous cortical neuronal activity. Our study demonstrated neurovascular plasticity accompanying rehabilitation-elicited functional recovery in the subacute stage following stroke, and multiple micro-ultrasound-based markers of cerebrovascular structure and function modified in recovery from ischemia and upon rehabilitation.
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Affiliation(s)
- Johnson Yu
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Illsung L Joo
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Paolo Bazzigaluppi
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
- MetaCell, Cagliari, Italy
| | - Margaret M Koletar
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Emmanuel Cherin
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Andrew G Stanisz
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - James WC Graham
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Christine Demore
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Bojana Stefanovic
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
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Periasamy M, Muthukumar V, Venkatramani H, Sabapathy SR. Reconstruction of plantar forefoot in diabetic foot ulcers with microvascular tissue transfer using tunneled pedicle with dorsal anastomosis. J Plast Reconstr Aesthet Surg 2024; 91:3-5. [PMID: 38401275 DOI: 10.1016/j.bjps.2024.02.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 02/04/2024] [Indexed: 02/26/2024]
Affiliation(s)
- Madhu Periasamy
- Division of Plastic Surgery, Hand Surgery, Reconstructive Microsurgery and Burns, Ganga Hospital, 313 Mettupalayam Road, Coimbatore 641043, Tamil Nadu, India.
| | - Vamseedharan Muthukumar
- Division of Plastic Surgery, Hand Surgery, Reconstructive Microsurgery and Burns, Ganga Hospital, 313 Mettupalayam Road, Coimbatore 641043, Tamil Nadu, India.
| | - Hari Venkatramani
- Division of Plastic Surgery, Hand Surgery, Reconstructive Microsurgery and Burns, Ganga Hospital, 313 Mettupalayam Road, Coimbatore 641043, Tamil Nadu, India.
| | - Shanmuganathan Raja Sabapathy
- Division of Plastic Surgery, Hand Surgery, Reconstructive Microsurgery and Burns, Ganga Hospital, 313 Mettupalayam Road, Coimbatore 641043, Tamil Nadu, India.
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Devecioğlu İ, Karakulak E. Three Sliding Probes Placed on Forelimb Skin for Proprioceptive Feedback Differentially yet Complementarily Contribute to Hand Gesture Detection and Object-Size Discrimination. Ann Biomed Eng 2024; 52:982-996. [PMID: 38246964 PMCID: PMC10940487 DOI: 10.1007/s10439-023-03434-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 12/22/2023] [Indexed: 01/23/2024]
Abstract
The purpose was to assess the effectiveness of three sliding tactile probes placed on the forelimb skin to provide proprioceptive feedback for the detection of hand gestures and discrimination of object size. Tactile contactors representing the first three fingers were driven along the proximodistal axis by linear servo motors. Twenty healthy subjects were involved in the gesture detection test, with 10 of them also participating in the object-size discrimination task. Motors were controlled by computer in the first four sessions of the gesture detection experiment, while the fifth session utilized a sensorized glove. Both the volar and dorsal sides of the forearm were examined. In the object-size discrimination experiment, the method was exclusively assessed on the volar surface under four distinct feedback conditions, including all fingers and each finger separately. The psychophysical data were further analyzed using a structural equation model (SEM) to evaluate the specific contributions of each individual contactor. Subjects consistently outperformed the chance level in detecting gestures. Performance improved up to the third session, with better results obtained on the volar side. The performances were similar in the fourth and fifth sessions. The just noticeable difference for achieving a 75% discrimination accuracy was found to be 2.90 mm of movement on the skin. SEM analysis indicated that the contactor for the index finger had the lowest importance in gesture detection, while it played a more significant role in object-size discrimination. However, all fingers were found to be significant predictors of subjects' responses in both experiments, except for the thumb, which was deemed insignificant in object-size discrimination. The study highlights the importance of considering the partial contribution of each degree of freedom in a sensory feedback system, especially concerning the task, when designing such systems.
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Affiliation(s)
- İsmail Devecioğlu
- Biomedical Engineering Department, Çorlu Faculty of Engineering, Tekirdağ Namık Kemal University, Tekirdağ, Turkey.
| | - Ertuğrul Karakulak
- Department of Biomedical Device Technologies, Vocational School of Technical Sciences, Tekirdağ Namık Kemal University, Tekirdağ, Turkey
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Kristl AC, Akay T, Miri A. Recording Forelimb Muscle Activity in Head-Fixed Mice with Chronically Implanted EMG Electrodes. J Vis Exp 2024. [PMID: 38619242 DOI: 10.3791/66584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024] Open
Abstract
Powerful genetic and molecular tools available in mouse systems neuroscience research have enabled researchers to interrogate motor system function with unprecedented precision in head-fixed mice performing a variety of tasks. The small size of the mouse makes the measurement of motor output difficult, as the traditional method of electromyographic (EMG) recording of muscle activity was designed for larger animals like cats and primates. Pending commercially available EMG electrodes for mice, the current gold-standard method for recording muscle activity in mice is to make electrode sets in-house. This article describes a refinement of established procedures for hand fabrication of an electrode set, implantation of electrodes in the same surgery as headplate implantation, fixation of a connector on the headplate, and post-operative recovery care. Following recovery, millisecond-resolution EMG recordings can be obtained during head-fixed behavior for several weeks without noticeable changes in signal quality. These recordings enable precise measurement of forelimb muscle activity alongside in vivo neural recording and/or perturbation to probe mechanisms of motor control in mice.
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Affiliation(s)
| | - Turgay Akay
- Department of Medical Neuroscience, Dalhousie University
| | - Andrew Miri
- Department of Neurobiology, Northwestern University
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8
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Armshaw J, Butcher G, Becker A. Gathering Self-Initiated Rat Behavioral Data to Characterize Post-Stroke Deficits. J Vis Exp 2024. [PMID: 38557586 DOI: 10.3791/64967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024] Open
Abstract
Behavioral testing in rat models is frequently utilized for diverse purposes, including psychological, biomedical, and behavioral research. Many traditional approaches involve individual, one-on-one testing sessions between a single researcher and each animal in an experiment. This setup can be very time consuming for the researcher, and their presence may impact the behavioral data in unwanted ways. Additionally, traditional caging for rat research imposes a lack of enrichment, exercise, and socialization that would normally be typical for the species, and this context may also skew the results of behavioral data. Overcoming these limitations may be worthwhile for several research applications, including the study of acquired brain injury. Here, an example method is presented for automatically training and testing individual rat behavior in a colony cage without the presence of humans. Radio frequency identification can be utilized to tailor sessions to the individual rat. The validation of this system occurred in the example context of measuring skilled forelimb motor performance before and after stroke. Traditional characteristics of post-stroke behavioral impairments and novel measures enabled by the system are measured, including success rate, various aspects of pull force, bout analysis, initiation rate and patterns, session duration, and circadian patterns. These variables can be collected automatically with few limitations; though the apparatus removes experimental control of exposure, timing and practice, the validation produced reasonable consistency in these variables from animal to animal.
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Affiliation(s)
- Jared Armshaw
- Department of Behavior Analysis, College of Health and Public Service, University of North Texas
| | - Grayson Butcher
- Department of Behavior Analysis, College of Health and Public Service, University of North Texas
| | - April Becker
- Department of Behavior Analysis, College of Health and Public Service, University of North Texas;
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Charlotte C. P, Benoit B, Olivier M. L. The effects of a synthetic epidermis spray on secondary intention wound healing in adult horses. PLoS One 2024; 19:e0299990. [PMID: 38451976 PMCID: PMC10919598 DOI: 10.1371/journal.pone.0299990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 02/19/2024] [Indexed: 03/09/2024] Open
Abstract
OBJECTIVES To evaluate secondary intention wound healing in the horse's limbs when treated with the synthetic epidermis spray (Novacika®, Cohesive S.A.S, France) or with a standard bandaging technique. METHODS Six Standardbred mares were included in the study. Four 2.5 x 2.5 cm full-thickness skin wounds were created on each thoracic limb. Two wounds were located on the dorsoproximal aspect of the cannon bone and the other two at the dorsoproximal aspect of the fetlock. Six hours after creation, wounds were randomly treated with synthetic epidermis spray or standard bandaging. The wounds were assessed every 4 days by gross visual assessment and using a 3D imaging camera. Analysis was performed with a 3D imaging application. RESULTS Out of 46 wounds, 22 showed exuberant granulation tissue and were part of the standard bandaging group. Whether the wounds were treated with synthetic epidermis spray or standard bandaging, the time for healing was the same. CONCLUSION The synthetic epidermis spray studied in this model has allowed healing without the production of exuberant granulation tissue but did not reduce the median wound healing time compared to a standard bandaging technique. The synthetic epidermis spray is potentially an interesting alternative for the management of secondary intention wound healing of superficial and non-infected distal limb wounds in adult horses on economical and practical aspects. However, all statistical inference (p-values especially) must be interpreted with caution, given the size of the sample.
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Affiliation(s)
- Paindaveine Charlotte C.
- Unité ICE-Groupe de Recherche en Médecine et Rééducation des Equidés de Sport (GREMERES), Centre for Equine Health, Ecole Nationale Vétérinaire de Lyon, VetAgro Sup, Université de Lyon, Lyon, France
| | - Bihin Benoit
- Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Lepage Olivier M.
- Unité ICE-Groupe de Recherche en Médecine et Rééducation des Equidés de Sport (GREMERES), Centre for Equine Health, Ecole Nationale Vétérinaire de Lyon, VetAgro Sup, Université de Lyon, Lyon, France
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10
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Meroni M, Scaglioni MF. Reply to: Re: Revisiting the pedicled circumflex scapular artery (pCSA) perforator flap: From simple to complex loco-regional reconstructions. J Plast Reconstr Aesthet Surg 2024; 90:348-349. [PMID: 37919168 DOI: 10.1016/j.bjps.2023.10.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 10/07/2023] [Indexed: 11/04/2023]
Affiliation(s)
- Matteo Meroni
- Department of Hand, and Plastic Surgery, Luzerner Kantonsspital, Lucerne, Switzerland; Department of Health Sciences and Medicine, University of Lucerne, Lucerne, Switzerland
| | - Mario F Scaglioni
- Department of Hand, and Plastic Surgery, Luzerner Kantonsspital, Lucerne, Switzerland; Department of Health Sciences and Medicine, University of Lucerne, Lucerne, Switzerland.
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Tay JQ. Re: Revisiting the pedicled circumflex scapular artery (pCSA) perforator flap: From simple to complex loco-regional reconstructions. J Plast Reconstr Aesthet Surg 2024; 90:346-347. [PMID: 37748999 DOI: 10.1016/j.bjps.2023.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 09/07/2023] [Indexed: 09/27/2023]
Affiliation(s)
- Jing Qin Tay
- Plastic, Burns and Reconstructive Surgery Department, Salisbury District Hospital, Thames Valley/Wessex Deanery, UK.
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Chen SF, Yang BY, Zhang TY, Song XY, Jia ZB, Chen LJ, Cui MY, Xu WJ, Peng J. Study on the preservation effects of the amputated forelimb by machine perfusion at physiological temperature. Chin J Traumatol 2024; 27:114-120. [PMID: 37311687 DOI: 10.1016/j.cjtee.2023.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/31/2023] [Accepted: 05/02/2023] [Indexed: 06/15/2023] Open
Abstract
PURPOSE Ischemia and hypoxia are the main factors limiting limb replantation and transplantation. Static cold storage (SCS), a common preservation method for tissues and organs, can only prolong limb ischemia time to 4 - 6 h. The normothermic machine perfusion (NMP) is a promising method for the preservation of tissues and organs, which can extend the preservation time in vitro by providing continuous oxygen and nutrients. This study aimed to evaluate the difference in the efficacy of the 2 limb preservation methods. METHODS The 6 forelimbs from beagle dogs were divided into 2 groups. In the SCS group (n = 3), the limbs were preserved in a sterile refrigerator at 4 °C for 24 h, and in the NMP group (n = 3), the perfusate prepared with autologous blood was used for the oxygenated machine perfusion at physiological temperature for 24 h, and the solution was changed every 6 h. The effects of limb storage were evaluated by weight gain, perfusate biochemical analysis, enzyme-linked immunosorbent assay, and histological analysis. All statistical analyses and graphs were performed using GraphPad Prism 9.0 one-way or two-way analysis of variance. The p value of less than 0.05 was considered to indicate statistical significance. RESULTS In the NMP group, the weight gained percentage was 11.72% ± 4.06%; the hypoxia-inducible factor-1α contents showed no significant changes; the shape of muscle fibers was normal; the gap between muscle fibers slightly increased, showing the intercellular distance of (30.19 ± 2.83) μm; and the vascular α-smooth muscle actin (α-SMA) contents were lower than those in the normal blood vessels. The creatine kinase level in the perfusate of the NMP group increased from the beginning of perfusion, decreased after each perfusate change, and remained stable at the end of perfusion showing a peak level of 4097.6 U/L. The lactate dehydrogenase level of the NMP group increased near the end of perfusion and reached the peak level of 374.4 U/L. In the SCS group, the percentage of weight gain was 0.18% ± 0.10%, and the contents of hypoxia-inducible factor-1α increased gradually and reached the maximum level of (164.85 ± 20.75) pg/mL at the end of the experiment. The muscle fibers lost their normal shape and the gap between muscle fibers increased, showing an intercellular distance of (41.66 ± 5.38) μm. The contents of vascular α-SMA were much lower in the SCS group as compared to normal blood vessels. CONCLUSIONS NMP caused lesser muscle damage and contained more vascular α-SMA as compared to SCS. This study demonstrated that NMP of the amputated limb with perfusate solution based on autologous blood could maintain the physiological activities of the limb for at least 24 h.
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Affiliation(s)
| | - Bo-Yao Yang
- Medical School of PLA, Beijing, 100048, China
| | - Tie-Yuan Zhang
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China
| | - Xiang-Yu Song
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China; Hebei North University, Zhangjiakou, 075000, Hebei Province, China
| | - Zhi-Bo Jia
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China; Hebei North University, Zhangjiakou, 075000, Hebei Province, China
| | - Lei-Jia Chen
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China; Hebei North University, Zhangjiakou, 075000, Hebei Province, China
| | - Meng-Yi Cui
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China
| | - Wen-Jing Xu
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China
| | - Jiang Peng
- Guizhou Medical University, Guiyang, 550025, China; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China.
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13
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Vermeulen AD, Booth TM. Lameness associated with mixed pastern pathology in a Thoroughbred yearling. N Z Vet J 2024; 72:118-121. [PMID: 38198831 DOI: 10.1080/00480169.2023.2294798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Indexed: 01/12/2024]
Affiliation(s)
| | - T M Booth
- Morphettville Equine Clinic, Adelaide, Australia
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14
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Mersha MD, Hubbard R, Zeiler SR. Alternate Day Fasting Leads to Improved Post-Stroke Motor Recovery in Mice. Neurorehabil Neural Repair 2024; 38:187-196. [PMID: 38425047 DOI: 10.1177/15459683241232680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
BACKGROUND Caloric restriction promotes neuroplasticity and recovery after neurological injury. In mice, we tested the hypothesis that caloric restriction can act post-stroke to enhance training-associated motor recovery. METHODS Mice were trained to perform a skilled prehension task. We then induced a photothrombotic stroke in the caudal forelimb area, after which we retrained animals on the prehension task following an 8-day delay. Mice underwent either ad libitum feeding or alternate day fasting beginning 1-day after stroke and persisting for either 7 days or the entire post-stroke training period until sacrifice. RESULTS Prior studies have shown that post-stroke recovery of prehension can occur if animals receive rehabilitative training during an early sensitive period but is incomplete if rehabilitative training is delayed. In contrast, we show complete recovery of prehension, despite a delay in rehabilitative training, when mice underwent alternate day fasting beginning 1-day post-stroke and persisting for either 7 days or the entire post-stroke training period until sacrifice. Recovery was independent of weight loss. Stroke volumes were similar across groups. CONCLUSIONS Post-stroke caloric restriction led to recovery of motor function independent of a protective effect on stroke volume. Prehension recovery improved even after ad libitum feeding was reinstituted suggesting that the observed motor recovery was not merely a motivational response. These data add to the growing evidence that post-stroke caloric restriction can enhance recovery.
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Affiliation(s)
- Mahlet D Mersha
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
| | - Robert Hubbard
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
| | - Steven R Zeiler
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
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15
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Wu Q, O’Connor JK, Wang S, Zhou Z. Transformation of the pectoral girdle in pennaraptorans: critical steps in the formation of the modern avian shoulder joint. PeerJ 2024; 12:e16960. [PMID: 38436017 PMCID: PMC10909347 DOI: 10.7717/peerj.16960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/26/2024] [Indexed: 03/05/2024] Open
Abstract
Important transformations of the pectoral girdle are related to the appearance of flight capabilities in the Dinosauria. Previous studies on this topic focused mainly on paravians yet recent data suggests flight evolved in dinosaurs several times, including at least once among non-avialan paravians. Thus, to fully explore the evolution of flight-related avian shoulder girdle characteristics, it is necessary to compare morphology more broadly. Here, we present information from pennaraptoran specimens preserving pectoral girdle elements, including all purportedly volant taxa, and extensively compare aspects of the shoulder joint. The results show that many pectoral girdle modifications appear during the evolution from basal pennaraptorans to paravians, including changes in the orientation of the coracoid body and the location of the articulation between the furcula and scapula. These modifications suggest a change in forelimb range of motion preceded the origin of flight in paravians. During the evolution of early avialans, additional flight adaptive transformations occur, such as the separation of the scapula and coracoid and reduction of the articular surface between these two bones, reduction in the angle between these two elements, and elongation of the coracoid. The diversity of coracoid morphologies and types of articulations joining the scapula-coracoid suggest that each early avialan lineage evolved these features in parallel as they independently evolved more refined flight capabilities. In early ornithothoracines, the orientation of the glenoid fossa and location of the acrocoracoid approaches the condition in extant birds, suggesting a greater range of motion in the flight stroke, which may represent the acquisition of improved powered flight capabilities, such as ground take-off. The formation of a new articulation between the coracoid and furcula in the Ornithuromorpha is the last step in the formation of an osseous triosseal canal, which may indicate the complete acquisition of the modern flight apparatus. These morphological transitions equipped birds with a greater range of motion, increased and more efficient muscular output and while at the same time transmitting the increased pressure being generated by ever more powerful flapping movements in such a way as to protect the organs. The driving factors and functional adaptations of many of these transitional morphologies are as yet unclear although ontogenetic transitions in forelimb function observed in extant birds provide an excellent framework through which we can explore the behavior of Mesozoic pennaraptorans.
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Affiliation(s)
- Qian Wu
- University of Chinese Academy of Sciences, Beijing, China
- CAS Center for Excellence in Life and Paleoenvironment, Beijing, China
- Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China
| | - Jingmai K. O’Connor
- Negaunee Integrative Research Center, Field Museum of Natural History, Chicago, IL, United States of America
| | - Shiying Wang
- College of Paleontology, Shenyang Normal University, Shenyang, China
| | - Zhonghe Zhou
- CAS Center for Excellence in Life and Paleoenvironment, Beijing, China
- Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China
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16
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Wei HR, Tang L, Yang XL, Chen CM, Li LX, Mao Y, Wang D, Kang F, Qun S, Zhang Z, Cao P, Jin Y. A microglial activation cascade across cortical regions underlies secondary mechanical hypersensitivity to amputation. Cell Rep 2024; 43:113804. [PMID: 38368612 DOI: 10.1016/j.celrep.2024.113804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 08/03/2023] [Accepted: 01/31/2024] [Indexed: 02/20/2024] Open
Abstract
Neural mechanisms underlying amputation-related secondary pain are unclear. Using in vivo two-photon imaging, three-dimensional reconstruction, and fiber photometry recording, we show that a microglial activation cascade from the primary somatosensory cortex of forelimb (S1FL) to the primary somatosensory cortex of hindlimb (S1HL) mediates the disinhibition and subsequent hyperexcitation of glutamatergic neurons in the S1HL (S1HLGlu), which then drives secondary mechanical hypersensitivity development in ipsilateral hindpaws of mice with forepaw amputation. Forepaw amputation induces rapid S1FL microglial activation that further activates S1HL microglia via the CCL2-CCR2 signaling pathway. Increased engulfment of GABAergic presynapses by activated microglia stimulates S1HLGlu neuronal activity, ultimately leading to secondary mechanical hypersensitivity of hindpaws. It is widely believed direct neuronal projection drives interactions between distinct brain regions to prime specific behaviors. Our study reveals microglial interactions spanning different subregions of the somatosensory cortex to drive a maladaptive neuronal response underlying secondary mechanical hypersensitivity at non-injured sites.
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Affiliation(s)
- Hong-Rui Wei
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China
| | - Lan Tang
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China
| | - Xin-Lu Yang
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China; Department of Anesthesiology, The First Affiliated Hospital of Wannan Medical College, Wuhu, Anhui 241000, China
| | - Chang-Mao Chen
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China
| | - Le-Xian Li
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China
| | - Yu Mao
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Di Wang
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China
| | - Fang Kang
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China
| | - Sen Qun
- Stroke Center and Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China
| | - Zhi Zhang
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China; Center for Advanced Interdisciplinary Science and Biomedicine, Institute of Health and Medicine, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China.
| | - Peng Cao
- Stroke Center and Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China.
| | - Yan Jin
- Stroke Center and Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China.
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Heniff AC, Petritz OA, Carpenter RG, Lewbart GA, Balko JA. Anesthetic efficacy of dexmedetomidine-ketamine in eastern box turtles (Terrapene carolina carolina) is enhanced with the addition of midazolam and when administered in the forelimb versus the hindlimb. Am J Vet Res 2024; 85:ajvr.23.10.0226. [PMID: 38039626 DOI: 10.2460/ajvr.23.10.0226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 11/16/2023] [Indexed: 12/03/2023]
Abstract
OBJECTIVE To compare dexmedetomidine-ketamine (DK; 0.1 and 10 mg/kg, respectively) with midazolam (M; 1.0 mg/kg) or 0.9% sodium chloride (S; 0.2 mL/kg) administered IM in the forelimb (F) or hindlimb (H) in eastern box turtles (Terrapene carolina carolina). ANIMALS 20 clinically healthy, captive adult eastern box turtles. METHODS In a randomized, blinded, complete crossover study with 1-week washout periods, turtles were administered each of 3 treatments: F-DKS, F-DKM, or H-DKM. Palpebral reflex, muscle tone, and withdrawal responses were serially assessed and used to calculate cumulative sedation scores at each 5-minute time point. The ability to intubate was evaluated. At 60 minutes, atipamezole (1.0 mg/kg) and either flumazenil (F-DKM, H-DKM; 0.05 mg/kg) or 0.9% sodium chloride (F-DKS; 0.5 mL/kg) were administered IM. RESULTS All treatments resulted in clinically relevant anesthetic effects. F-DKM produced significantly higher sedation scores than H-DKM or F-DKS at all time points between 10 and 60 minutes (P < .05). Sedation score variability was observed with all treatments with significantly higher variability for H-DKM (P < .05). Intubation was successful in 32, 89, and 11% of turtles in F-DKS, F-DKM, and H-DKM, respectively. Median (range) recovery time was 10 (5-22), 16 (7-45), and 12 (4-28) minutes for F-DKS, F-DKM, and H-DKM, respectively. CLINICAL RELEVANCE In eastern box turtles, forelimb dexmedetomidine-ketamine resulted in clinically relevant anesthetic effects that were heightened with the addition of midazolam. Hindlimb administration of midazolam-dexmedetomidine-ketamine resulted in reduced and more variable anesthetic effects compared to forelimb administration, supporting a hepatic first-pass effect.
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Affiliation(s)
- Ashlyn C Heniff
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - Olivia A Petritz
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - Rachel G Carpenter
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - Gregory A Lewbart
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
| | - Julie A Balko
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC
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Ren M, Liou L, Vinit S, Lee K. Trans-spinal magnetic stimulation induces co-activation of the diaphragm and biceps in healthy subjects. Physiol Rep 2024; 12:e15941. [PMID: 38325910 PMCID: PMC10849884 DOI: 10.14814/phy2.15941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/15/2024] [Accepted: 01/15/2024] [Indexed: 02/09/2024] Open
Abstract
The present study was designed to examine the effect of trans-spinal magnetic stimulation on bilateral respiratory and forelimb muscles in healthy subjects. Two wings of a figure-of-eight magnetic coil were placed on the dorsal vertebrae, from the fifth cervical to the second thoracic dorsal vertebra with a center at the seventh cervical vertebra. The surface electromyograms of bilateral diaphragm and biceps were recorded in response to trans-spinal magnetic stimulation with 20%-100% maximum output of the stimulatory device in male (n = 12) and female participants (n = 8). Trans-spinal magnetic stimulation can induce a co-activation of bilateral diaphragm and biceps when the stimulation intensity is above 60%. The onset latency was comparable between the left and right sides of the muscles, suggesting bilateral muscles could be simultaneously activated by trans-spinal magnetic stimulation. In addition, the intensity-response curve of the biceps was shifted upward compared with that of the diaphragm in males, indicating that the responsiveness of the biceps was greater than that of the diaphragm. This study demonstrated the feasibility of utilizing trans-spinal magnetic stimulation to co-activate the bilateral diaphragm and biceps. We proposed that this stimulatory configuration can be an efficient approach to activate both respiratory and forelimb muscles.
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Affiliation(s)
- Ming‐Yue Ren
- Department of Biological SciencesNational Sun Yat‐sen UniversityKaohsiungTaiwan
| | - Li‐Min Liou
- Department of NeurologyKaohsiung Medical University Hospital, Kaohsiung Medical UniversityKaohsiungTaiwan
- Department of Neurology, School of Medicine, College of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
- Graduate Institute of Clinical Medicine, College of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
| | - Stéphane Vinit
- Université Paris‐Saclay, UVSQ, Inserm, END‐ICAPVersaillesFrance
| | - Kun‐Ze Lee
- Department of Biological SciencesNational Sun Yat‐sen UniversityKaohsiungTaiwan
- Department of Biomedical Science and Environmental BiologyKaohsiung Medical UniversityKaohsiungTaiwan
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Westman S, Cullen TE, Bergstrom TC, Edwards LA, Garcia TC, Stover SM. Ex vivo biomechanical evaluation of an adhered fiberglass and polymethyl methacrylate sole-hoof wall cast on stabilization of type III distal phalanx fractures under simulated physiologic midstance loads. Vet Surg 2024; 53:224-233. [PMID: 38135923 DOI: 10.1111/vsu.14063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 11/16/2023] [Accepted: 12/02/2023] [Indexed: 12/24/2023]
Abstract
OBJECTIVE To evaluate the effect of the application of a novel fiberglass-glue cast (FGC) on the fracture gap width in experimentally created type III distal phalanx fractures in cadaveric specimens under simulated physiologic loads. STUDY DESIGN Ex vivo biomechanical laboratory study. ANIMALS Nine unilateral adult equine cadaver forelimbs. METHODS Type III distal phalanx fractures were created in forelimb specimens, which maintained distal components of the passive stay apparatus. The fracture gap was measured at 5%, 20%, 25%, 50%, 75%, and 95% of fracture length (palmar articular border to solar margin) using D65Pr-PaDiO radiographs. The limb was axially loaded (700, 3600, 4600, and 6700 N) before, during, and after removal of a woven fiberglass cloth and polymethyl methacrylate cast that encompassed the sole and distal portion of the hoof wall (FGC). Fracture gap widths were compared among loads and treatments using a mixed model ANOVA. RESULTS On average, under simulated physiological midstance loads, the fracture gap width was 0.2 mm smaller after FGC application, with the greatest decrease (0.5 mm) near the articular surface. On average, it was 0.3 mm smaller than after FGC removal. Fracture gap width was 0.1 mm greater when midstance loads transitioned from standing load to walking, trotting, and gallop loads. The fracture gap width increased by 1.3 mm with increasing distance from the articular surface. CONCLUSION The FGC reduced the fracture gap width and prevented the fracture gap widening that occurred after FGC removal. CLINICAL SIGNIFICANCE The findings support consideration of FGC use in the treatment of horses with type III distal phalangeal fractures.
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Affiliation(s)
- Shane Westman
- William R. Prichard Veterinary Medical Teaching Hospital, University of California, Davis, Davis, California, USA
| | | | - Thomas C Bergstrom
- William R. Prichard Veterinary Medical Teaching Hospital, University of California, Davis, Davis, California, USA
| | | | - Tanya C Garcia
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, California, USA
| | - Susan M Stover
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, California, USA
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Jiang H, Szwedo J, Labandeira CC, Chen J, Moulds MS, Mähler B, Muscente AD, Zhuo D, Nyunt TT, Zhang H, Wei C, Rust J, Wang B. Mesozoic evolution of cicadas and their origins of vocalization and root feeding. Nat Commun 2024; 15:376. [PMID: 38191461 PMCID: PMC10774268 DOI: 10.1038/s41467-023-44446-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 12/13/2023] [Indexed: 01/10/2024] Open
Abstract
Extant cicada (Hemiptera: Cicadoidea) includes widely distributed Cicadidae and relictual Tettigarctidae, with fossils ascribed to these two groups based on several distinct, minimally varying morphological differences that define their extant counterparts. However, directly assigning Mesozoic fossils to modern taxa may overlook the role of unique and transitional features provided by fossils in tracking their early evolutionary paths. Here, based on adult and nymphal fossils from mid-Cretaceous Kachin amber of Myanmar, we explore the phylogenetic relationships and morphological disparities of fossil and extant cicadoids. Our results suggest that Cicadidae and Tettigarctidae might have diverged at or by the Middle Jurassic, with morphological evolution possibly shaped by host plant changes. The discovery of tymbal structures and anatomical analysis of adult fossils indicate that mid-Cretaceous cicadas were silent as modern Tettigarctidae or could have produced faint tymbal-related sounds. The discovery of final-instar nymphal and exuviae cicadoid fossils with fossorial forelegs and piercing-sucking mouthparts indicates that they had most likely adopted a subterranean lifestyle by the mid-Cretaceous, occupying the ecological niche of underground feeding on root. Our study traces the morphological, behavioral, and ecological evolution of Cicadoidea from the Mesozoic, emphasizing their adaptive traits and interactions with their living environments.
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Affiliation(s)
- Hui Jiang
- State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China.
- Institute of Geology and Paleontology, Charles University, Prague, 12843, Czech Republic.
- Section Palaeontology, Institute of Geosciences, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, 53115, Germany.
| | - Jacek Szwedo
- Laboratory of Evolutionary Entomology and Museum of Amber Inclusions, Department of Invertebrate Zoology and Parasitology, University of Gdańsk, Gdańsk, PL80-308, Poland
| | - Conrad C Labandeira
- Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC, 20013, USA
- Department of Entomology and Behavior, Ecology, Evolution, and Systematics Program, University of Maryland, College Park, MD, 20742, USA
- School of Life Sciences, Capital Normal University, Beijing, 100048, China
| | - Jun Chen
- Institute of Geology and Paleontology, Linyi University, Linyi, 276000, China
| | - Maxwell S Moulds
- Australian Museum Research Institute, Sydney, NSW, 2010, Australia
| | - Bastian Mähler
- Section Palaeontology, Institute of Geosciences, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, 53115, Germany
| | | | - De Zhuo
- Beijing Xiachong Amber Museum, Beijing, 100083, China
| | - Thet Tin Nyunt
- Department of Geological Survey and Mineral Exploration, Ministry of Natural Resources and Environmental Conservation, Myanmar Gems Museum, Nay Pyi Taw, 15011, Myanmar
| | - Haichun Zhang
- State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Cong Wei
- Key Laboratory of Plant Protection Resources and Pest Management of the Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jes Rust
- Section Palaeontology, Institute of Geosciences, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, 53115, Germany
| | - Bo Wang
- State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China.
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Persson-Sjodin E, Hernlund E, Pfau T, Andersen PH, Forsström KH, Byström A, Serra Bragança FM, Hardeman A, Greve L, Egenvall A, Rhodin M. Withers vertical movement symmetry is useful for locating the primary lame limb in naturally occurring lameness. Equine Vet J 2024; 56:76-88. [PMID: 37226583 DOI: 10.1111/evj.13947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 05/04/2023] [Indexed: 05/26/2023]
Abstract
BACKGROUND During orthopaedic assessment of lame horses, a head nod is commonly present in both primary forelimb and hindlimb lame horses. Additional motion metrics that could assist clinicians in correctly differentiating between these two scenarios would be of great clinical value. OBJECTIVES The primary objective of this study was to examine whether withers movement asymmetry can be used in a clinical setting to distinguish primary forelimb lameness from compensatory head movement asymmetry due to primary hindlimb lameness. STUDY DESIGN Retrospective, multicentre study. METHODS Movement asymmetry of head, withers and pelvis was measured using multi-camera optical motion capture, as part of routine lameness investigations at four European equine hospitals. Vertical movement asymmetry parameters from 317 horses trotting in a straight line were compared before and after successful diagnostic analgesia of a single limb. Descriptive statistics, t-tests and linear models were used to analyse the data. RESULTS In forelimb lame horses, 80%-81% showed head and withers asymmetry both indicating lameness in the same forelimb. In hindlimb lame horses, 69%-72% showed head asymmetry ipsilateral to the lame hindlimb and withers asymmetry diagonal to the lame hindlimb, thus, head and withers asymmetry indicated lameness in different forelimbs. A large (>15 mm) compensatory head nod was seen in 28%-31% of the hindlimb lame horses. In 89%-92% of these, head and withers asymmetry indicated lameness in different forelimbs. Withers asymmetry decreased linearly with reduced head or pelvic asymmetry for both forelimb and hindlimb lame horses. MAIN LIMITATIONS Compensatory strategies were evaluated on group level to identify common patterns, potentially ignoring uncommon individual strategies. CONCLUSIONS Withers vertical movement asymmetry metrics can be useful in helping to locate the primary lame limb during quantitative lameness assessment. Head and withers movement asymmetry parameters generally indicate the same forelimb in forelimb lame horses, but different forelimbs in hindlimb lame horses.
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Affiliation(s)
- Emma Persson-Sjodin
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Elin Hernlund
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Thilo Pfau
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Pia Haubro Andersen
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Karin Holm Forsström
- Equine Clinic, University Animal Hospital, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Anna Byström
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Filipe M Serra Bragança
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Aagje Hardeman
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
- DataHorse, Wierden, The Netherlands
| | - Line Greve
- Evidensia Specialist Equine Hospital Helsingborg, Helsingborg, Sweden
| | - Agneta Egenvall
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Marie Rhodin
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
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Dockery A, Beasley B, Goldberg M, Aguirre G, Moorman VJ. Dose effect and duration of action of liposomal bupivacaine administered as a perineural analgesic in a reversible and adjustable frog-pressure model of equine lameness. Am J Vet Res 2024; 85:ajvr.23.06.0122. [PMID: 38171091 DOI: 10.2460/ajvr.23.06.0122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 10/02/2023] [Indexed: 01/05/2024]
Abstract
OBJECTIVE To determine the dose effect of peri-neural liposomal bupivacaine (LB) in an induced forelimb lameness model. ANIMALS 12 clinically normal adult horses. METHODS A randomized cross-over design was performed with 1 limb receiving saline and the other LB: low dose (6), high dose (6). Lameness was induced in 1 forelimb using a frog-pressure model. In the lame limb, peri-neural injection of the palmar nerves at the proximal sesamoid bones was performed using saline, low dose LB (0.25 mg/kg) (LDLB), or high dose LB (0.5mg/kg) (HDLB) in random order with a 1-week washout period between treatments. Distal limb swelling, mechanical nociceptive thresholds (MNT), and objective lameness data were collected before and up to 72 hours after peri-neural anesthesia. Data analysis was performed with mixed model ANOVA, equality of medians test, and Kaplan Meier survival analysis. RESULTS Compared with baseline, horses treated with LDLB and HDLB had improvements in MNT and lameness (P < .001). In the LDLB group, the median duration of analgesia was 4.5 hours (range = 3-6 hours) and the median return to lameness was 7 hours (range = 4-24 hours). In the HDLB group, the median duration of analgesia was 12 hours (range = 4-48 hours) and the median return to lameness was 9 hours (range = 3-48 hours). Mild to moderate swelling was identified in 11/12 (92%) LB limbs. CLINICAL RELEVANCE Both LDLB and HDLB resulted in loss of skin sensation and improvement of lameness. There was high variability among horses in duration of action for both doses.
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Pourreza E, Yaradanakul NB, Cengiz BC, Duyan Camurdan A, Zinnuroglu M, Gurses S. Spatiotemporal Evolution of Toddlers' Regional Foot Pressure Distribution and Center of Pressure at Antero-Posterior Axis During Learning of Standing. J Biomech Eng 2024; 146:011001. [PMID: 37851529 DOI: 10.1115/1.4063820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 10/14/2023] [Indexed: 10/20/2023]
Abstract
We investigated quiet stance of newly standing toddlers every three months (trimesters) of their second year of life. Their anteroposterior center-of-pressure (CoPx) velocity and centroidal frequency (CFREQ: 2.36 ± 0.10 to 1.50 ± 0.11 Hz) decreased over time. Besides, mean pressures revealed a potential role-sharing of foot regions in learning and control aspects of standing, with hindfoot carrying the highest (23.89 ± 6.47 kPa) pressure while forefoot the lowest (10.26 ± 2.51 kPa). The highest CFREQ of pressure signal was at midfoot. Through regional CoPx, forefoot has manifested the highest CFREQ (2.10 ± 0.40 Hz) and 90% power frequency (90%PF), whereas hindfoot presented the lowest (CFREQ: 1.80 ± 0.33 Hz). CFREQ and 90%PF of pressure and regional CoPx significantly decreased throughout the trimesters.
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Affiliation(s)
- Elmira Pourreza
- Biomechanics Lab, Department of Engineering Sciences, Middle East Technical University, Ankara 06800, Turkey
| | - Naci B Yaradanakul
- Department of Engineering Sciences, Middle East Technical University, Ankara 06800, Turkey
| | - Berat C Cengiz
- Department of Engineering Sciences, Middle East Technical University, Ankara 06800, Turkey
| | - Aysu Duyan Camurdan
- Department of Internal Medicine, Pediatrics Gazi University, Ankara 06500, Turkey
| | - Murat Zinnuroglu
- Department of Physical Medicine and Rehabilitation, Gazi University, Ankara 06500, Turkey
| | - Senih Gurses
- Department of Engineering Sciences, Middle East Technical University, Ankara 06800, Turkey
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24
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Sekiya SI, Nishimaniwa K, Tajima Y, Yamada TK. Functional anatomy of shoulder muscles in the Pacific white-sided dolphin (Lagenorhynchus obliquidens). Anat Rec (Hoboken) 2024; 307:172-184. [PMID: 37421200 DOI: 10.1002/ar.25284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 06/13/2023] [Accepted: 06/19/2023] [Indexed: 07/10/2023]
Abstract
Most intrinsic muscles of the forelimb in dolphins are either degenerated or lost; however, the muscles around the shoulder joint are well preserved. We dissected the forelimbs of Pacific white-sided dolphins and constructed a full-scale model of the flipper to compare and examine their movements following dissection. The humerus was oriented at approximately 45° ventrally from the horizontal plane of the dolphin and 45° caudally from the frontal plane. This maintains the neutral position of the flipper. The deltoideus and pectoralis major muscles were inserted into the body of the humerus, and the flipper was moved in the dorsal and ventral directions, respectively. A large tubercle, known as the common tubercle, was observed at the medial end of the humerus. Four muscles were inserted into the common tubercle: the brachiocephalicus, supraspinatus, and cranial part of the subscapularis, which laterally rotated the common tubercle. Subsequently, the flipper swung forward, and its radial edge was lifted. Conversely, the medial rotation of the common tubercle caused by the coracobrachialis and the caudal part of the subscapularis was accompanied by backward swinging of the flipper and lowering of the radial edge. These findings suggest the function of the flipper as a stabilizer or rudder is caused by the rotation of the humerus's common tubercle.
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Affiliation(s)
- Shin-Ichi Sekiya
- Faculty of Nursing, Niigata College of Nursing, Joetsu, Japan
- Department of Zoology, National Museum of Nature and Science, Tsukuba, Japan
| | - Keiko Nishimaniwa
- School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Yuko Tajima
- Department of Zoology, National Museum of Nature and Science, Tsukuba, Japan
| | - Tadasu K Yamada
- Department of Zoology, National Museum of Nature and Science, Tsukuba, Japan
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Nicksic PJ, Donnelly DT, Zeng W, Seitz AJ, Poore SO, Suminski AJ, Dingle AM. Trigeminal or peripheral nerve stimulation improves functional outcomes of nerve recovery in a rodent forelimb gap repair model. J Plast Reconstr Aesthet Surg 2024; 88:57-65. [PMID: 37952438 DOI: 10.1016/j.bjps.2023.10.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/10/2023] [Accepted: 10/20/2023] [Indexed: 11/14/2023]
Abstract
BACKGROUND The hypothesis of this study was that trigeminal nerve stimulation (TNS) or peripheral nerve stimulation (PNS) could improve functional outcomes of peripheral nerve injury in a rat forelimb model when compared to control rats not receiving electrical stimulation (ES). While PNS is known to improve outcomes after nerve surgery, the role of TNS has not been explored. METHODS Lewis rats were trained to perform a reach and grasp task before receiving a 2 mm gap repair of the ulnar and median nerves and randomized into four treatment groups: (1) sham injury, (2) nerve injury with sham ES, (3) nerve injury with PNS, and (4) nerve injury with TNS. Functional motor (median pull force and percent success in motor task) and sensory metrics (forelimb paw withdrawal thresholds) were collected both pre-injury and throughout rehabilitation. Nerves stained using Gomori's trichrome were assessed quantitatively and qualitatively. RESULTS The sham ES group did not recover their pre-injury baseline functional outcomes. In contrast, the TNS and PNS groups fully recovered following injury, with no difference in functional outcomes between the pre-injury baseline and the final week of rehabilitation (P > 0.05, all). Histomorphology results demonstrated no quantitative difference, but qualitative differences in architecture were evident. CONCLUSIONS Electrical stimulation of the trigeminal nerve or the injured nerve improved the functional outcomes of nerve regeneration in rodents. Histomorphology results of nerves from the TNS group support the proposed central mechanisms. This is an important step in translating this therapy as an adjunct, non-invasive treatment for high, mixed nerve injuries in humans.
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Affiliation(s)
- Peter J Nicksic
- University of Wisconsin, Division of Plastic and Reconstructive Surgery, Madison, WI, United States
| | - D'Andrea T Donnelly
- University of Wisconsin, Division of Plastic and Reconstructive Surgery, Madison, WI, United States
| | - Weifeng Zeng
- University of Wisconsin, Division of Plastic and Reconstructive Surgery, Madison, WI, United States
| | - Allison J Seitz
- University of Wisconsin, Division of Plastic and Reconstructive Surgery, Madison, WI, United States
| | - Samuel O Poore
- University of Wisconsin, Division of Plastic and Reconstructive Surgery, Madison, WI, United States
| | - Aaron J Suminski
- University of Wisconsin, Department of Neurological Surgery, Madison, WI, United States; Wisconsin Institute for Translational Neuroengineering, Madison, WI, United States
| | - Aaron M Dingle
- University of Wisconsin, Division of Plastic and Reconstructive Surgery, Madison, WI, United States.
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26
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Calábková G, Madzia D, Nosek V, Ivanov M. Tracking 'transitional' diadectomorphs in the earliest Permian of equatorial Pangea. PeerJ 2023; 11:e16603. [PMID: 38077424 PMCID: PMC10710172 DOI: 10.7717/peerj.16603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 11/15/2023] [Indexed: 12/18/2023] Open
Abstract
Diadectomorpha was a clade of large-bodied stem-amniotes or possibly early-diverging synapsids that established a successful dynasty of late Carboniferous to late Permian high-fiber herbivores. Aside from their fairly rich record of body fossils, diadectomorphs are also well-known from widely distributed tracks and trackways referred to as Ichniotherium. Here, we provide detailed description of a diadectomorph trackway and a manus-pes couple originating from two different horizons in the Asselian (lowermost Permian) of the Boskovice Basin in the Czech Republic. The specimens represent two distinct ichnotaxa of Ichniotherium, I. cottae and I. sphaerodactylum. Intriguingly, the I. cottae trackway described herein illustrates a 'transitional' stage in the posture evolution of diadectomorphs, showing track morphologies possibly attributable to a Diadectes-like taxon combined with distances between the successive manus and pes imprints similar to those observable in earlier-diverging diadectomorphs, such as Orobates. In addition, this trackway is composed of 14 tracks, including six well-preserved manus-pes couples, and thus represents the most complete record of Ichniotherium cottae described to date from the Asselian strata. In turn, the manus-pes couple, attributed here to I. sphaerodactylum, represents only the second record of this ichnotaxon from the European part of Pangea. Our study adds to the diversity of the ichnological record of Permian tetrapods in the Boskovice Basin which had been essentially unexplored until very recently.
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Affiliation(s)
- Gabriela Calábková
- Department of Geology and Paleontology, Moravian Museum, Brno, Czech Republic
- Department of Geological Sciences, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Daniel Madzia
- Department of Evolutionary Paleobiology, Institute of Paleobiology, Polish Academy of Sciences, Warsaw, Poland
| | - Vojtěch Nosek
- Department of Archaeology and Museology, Faculty of Arts, Masaryk University, Brno, Czech Republic
| | - Martin Ivanov
- Department of Geological Sciences, Faculty of Science, Masaryk University, Brno, Czech Republic
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27
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Brown BV, de Souza Amorim D. The stridulatory organ in Opetiidae and Phoridae (Diptera) and phylogenetic implications for the evolution of higher flies. Sci Rep 2023; 13:21412. [PMID: 38049527 PMCID: PMC10696050 DOI: 10.1038/s41598-023-48669-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 11/29/2023] [Indexed: 12/06/2023] Open
Abstract
Stridulatory sound-making organs evolved in a group of flies-the family Phoridae-by modifications of the microstructure of foreleg segments present in the shared ancestor of the clade (Phoridae + Opetiidae). The opetiids are the only group amongst the lower Cyclorrhapha in which plausible homologous structures could be found, though in a less derived condition. On the forefemur of Opetia there are numerous elongate, flattened microtrichia that in basal phorids are organized into a curved linear group (the scraper) which are scraped against a curved, ridged carina on the forecoxa (the file). The file was possibly derived from an extremely unusual set of three setae that have transverse sculpturing and sockets that limit lateral motion, and which are distributed across the opetiid forecoxa. In some phorid lineages, these setae seem to be fused into the forecoxa forming the linear ridged surface against which the scraper on the forefemur could be moved. The relationship between opetiids and phorids dates back to the Cretaceous, and this pattern of file and scraper can be clearly seen in some 100 mya Myanmar amber phorid fly fossils. These structures shared between opetiids and phorids suggest that these two families may be sister groups amongst the Platypezoidea. Different modifications of the forelegs of other higher flies may have similar roles.
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Affiliation(s)
- Brian V Brown
- Department of Entomology, Natural History Museum of Los Angeles County, Los Angeles, USA.
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28
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Metcalfe M, Steward O. PTEN deletion in spinal pathways via retrograde transduction with AAV-RG enhances forelimb motor recovery after cervical spinal cord injury; Sex differences and late-onset pathophysiologies. Exp Neurol 2023; 370:114551. [PMID: 37778650 DOI: 10.1016/j.expneurol.2023.114551] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/08/2023] [Accepted: 09/25/2023] [Indexed: 10/03/2023]
Abstract
Spinal cord injuries (SCI) cause permanent functional impairments due to interruption of motor and sensory pathways. Regeneration of axons does not occur due to lack of intrinsic growth capacity of adult neurons and extrinsic inhibitory factors, especially at the injury site. However, some regeneration can be achieved via deletion of the phosphatase and tensin homolog (PTEN) in cells of origin of spinal pathways. Here, we deployed an AAV variant that is retrogradely transported (AAV-rg) to deliver gene modifying cargos to the cells of origin of multiple pathways interrupted by SCI, testing whether this promoted recovery of motor function. PTENf/f;RosatdTomato mice and control RosatdTomato mice received injections of different doses (number of genome copies, GCs) of AAV-rg/Cre into the cervical spinal cord at the time of a C5 dorsal hemisection injury. Forelimb grip strength was tested over time using a grip strength meter. PTENf/f;RosatdTomato mice with AAV-rg/Cre (PTEN-deleted) exhibited substantial improvements in forelimb gripping ability in comparison to controls. Of note, there were major sex differences in the extent of recovery, with male mice exhibiting greater recovery than females. However, at around 5-7 weeks post-injury/injection, many mice with SCI and AAV-rg-mediated PTEN deletion began to exhibit pathophysiologies involving excessive scratching of the ears and back of the neck and rigid forward extension of the hindlimbs. These pathophysiologies increased in incidence and severity over time. Our results reveal that although intra-spinal injections of AAV-rg/Cre in PTENf/f;RosatdTomato mice can enhance forelimb motor recovery after SCI, late-developing functional abnormalities occur with the experimental conditions used here. Mechanisms underlying late-developing pathophysiologies remain to be defined.
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Affiliation(s)
- Mariajose Metcalfe
- Reeve-Irvine Research Center University of California Irvine School of Medicine, USA; Department of Anatomy & Neurobiology, University of California Irvine School of Medicine, USA
| | - Oswald Steward
- Reeve-Irvine Research Center University of California Irvine School of Medicine, USA; Department of Anatomy & Neurobiology, University of California Irvine School of Medicine, USA; Department of Neurobiology & Behavior, University of California Irvine, USA; Department of Neurosurgery, University of California Irvine School of Medicine, USA.
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29
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Milton AJ, Kwok JC, McClellan J, Randall SG, Lathia JD, Warren PM, Silver DJ, Silver J. Recovery of Forearm and Fine Digit Function After Chronic Spinal Cord Injury by Simultaneous Blockade of Inhibitory Matrix Chondroitin Sulfate Proteoglycan Production and the Receptor PTPσ. J Neurotrauma 2023; 40:2500-2521. [PMID: 37606910 PMCID: PMC10698859 DOI: 10.1089/neu.2023.0117] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023] Open
Abstract
Spinal cord injuries (SCI), for which there are limited effective treatments, result in enduring paralysis and hypoesthesia, in part because of the inhibitory microenvironment that develops and limits regeneration/sprouting, especially during chronic stages. Recently, we discovered that targeted enzymatic removal of the inhibitory chondroitin sulfate proteoglycan (CSPG) component of the extracellular and perineuronal net (PNN) matrix via Chondroitinase ABC (ChABC) rapidly restored robust respiratory function to the previously paralyzed hemi-diaphragm after remarkably long times post-injury (up to 1.5 years) following a cervical level 2 lateral hemi-transection. Importantly, ChABC treatment at cervical level 4 in this chronic model also elicited improvements in gross upper arm function. In the present study, we focused on arm and hand function, seeking to highlight and optimize crude as well as fine motor control of the forearm and digits at lengthy chronic stages post-injury. However, instead of using ChABC, we utilized a novel and more clinically relevant systemic combinatorial treatment strategy designed to simultaneously reduce and overcome inhibitory CSPGs. Following a 3-month upper cervical spinal hemi-lesion using adult female Sprague Dawley rats, we show that the combined treatment had a profound effect on functional recovery of the chronically paralyzed forelimb and paw, as well as on precision movements of the digits. The regenerative and immune system related events that we describe deepen our basic understanding of the crucial role of CSPG-mediated inhibition via the PTPσ receptor in constraining functional synaptic plasticity at lengthy time points following SCI, hopefully leading to clinically relevant translational benefits.
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Affiliation(s)
- Adrianna J. Milton
- Department of Neurosciences, Case Western Reserve University, Cleveland, Ohio, USA
| | - Jessica C.F. Kwok
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
- Institute of Experimental Medicine, Czech Academy of Science, Prague, Czech Republic
| | - Jacob McClellan
- Department of Neurosciences, Case Western Reserve University, Cleveland, Ohio, USA
| | - Sabre G. Randall
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner Research Institute, Cleveland, Ohio, USA
| | - Justin D. Lathia
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner Research Institute, Cleveland, Ohio, USA
- Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, Cleveland, Ohio, USA
| | - Philippa M. Warren
- Department of Neurosciences, Case Western Reserve University, Cleveland, Ohio, USA
- Wolfson Centre for Age-Related Diseases, King's College London, London, United Kingdom
| | - Daniel J. Silver
- Department of Neurosciences, Case Western Reserve University, Cleveland, Ohio, USA
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner Research Institute, Cleveland, Ohio, USA
- Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, Cleveland, Ohio, USA
| | - Jerry Silver
- Department of Neurosciences, Case Western Reserve University, Cleveland, Ohio, USA
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30
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Kilcoyne I, Nieto J, Magdesian KG, Nottle BF. Effects of a 10% dimethyl sulfoxide solution on radiocarpal joint amikacin pharmacokinetics during intravenous regional limb perfusion in standing sedated horses. Vet Surg 2023; 52:1171-1179. [PMID: 37280731 DOI: 10.1111/vsu.13973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 04/28/2023] [Accepted: 05/08/2023] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To determine the effect of a 10% dimethyl sulfoxide (DMSO) solution on the peak concentration (CMAX ) of amikacin in the radiocarpal joint (RCJ) during intravenous regional limb perfusion (IVRLP) compared with 0.9% NaCl. STUDY DESIGN Randomized crossover study. ANIMALS Seven healthy adult horses. METHODS The horses underwent IVRLP with 2 g of amikacin sulfate diluted to 60 mL using a 10% DMSO or 0.9% NaCl solution. Synovial fluid was collected from the RCJ at 5, 10, 15, 20, 25, and 30 minutes after IVRLP. The wide rubber tourniquet placed on the antebrachium was removed after the 30 min sample. Amikacin concentrations were quantified by a fluorescence polarization immunoassay. The mean CMAX and time to peak concentration (TMAX ) of amikacin within the RCJ were determined. A one-sided paired t-test was used to determine the differences between treatments. The significance level was p < .05. RESULTS The mean ± SD CMAX in the DMSO group was 1361.8 ± 593 μg/mL and in the 0.9% NaCl group it was 860 ± 481.6 μg/mL (p = .058). Mean TMAX using the 10% DMSO solution was 23 and 18 min using the 0.9% NaCl perfusate (p = .161). No adverse effects were associated with use of the 10% DMSO solution. CONCLUSION Although there were higher mean peak synovial concentrations using the 10% DMSO solution no difference in synovial amikacin CMAX between perfusate type was detected (p = .058). CLINICAL SIGNIFICANCE Use of a 10% DMSO solution in conjunction with amikacin during IVRLP is a feasible technique and does not negatively affect the synovial amikacin levels achieved. Further research is warranted to determine other effects of using DMSO during IVRLP.
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Affiliation(s)
- Isabelle Kilcoyne
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Los Angeles, California, USA
| | - Jorge Nieto
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Los Angeles, California, USA
| | - K Gary Magdesian
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Los Angeles, California, USA
| | - Bridget F Nottle
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
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31
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Kolding SA, Sørensen JN, Kramer J, McCracken MJ, Reed SK, Keegan KG. Prevalence and clinical significance of increasing head height asymmetry as a measure of forelimb lameness in horses when trotting in a straight line after palmar digital nerve block. Equine Vet J 2023; 55:988-994. [PMID: 36604754 DOI: 10.1111/evj.13921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 12/07/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND Some horses increase in forelimb lameness, measured as vertical head height asymmetry, or differences in maximums and minimums of head heights (HDmax, HDmin), after a palmar digital nerve (PDN) block. The prevalence of this finding, or what it means clinically, has not been reported in peer-reviewed literature. OBJECTIVES To estimate the prevalence of increasing head height asymmetry after a PDN block and determine if this is associated with cause of forelimb lameness. STUDY DESIGN Retrospective case series. METHODS Head height asymmetry, normalised to expected vertical head displacement, from inertial-sensor data collections of all horses evaluated for forelimb lameness while trotting in a straight line at two different clinics were screened for cases that had an initial PDN block and then another more proximal block in the same limb during the same lameness evaluation. Medical records of the screened cases (n = 213) were evaluated to determine the cause of lameness. Prevalence of increasing head height asymmetry was calculated. Differences in lameness amplitude between groups of cases that remained unchanged (Group 1), that increased (Group 2), and that decreased (Group 3) in head height asymmetry before and after the initial PDN block were compared (Kruskal-Wallis). Determination of the location of the cause of lameness and final diagnoses of cases were compared between Group 1 and Group 2 (chi-squared tests of independence). RESULTS The PDN block increased head height asymmetry at a prevalence of 32.5% (95% CI = 24.5%-41.5%) and 13.8% (95% CI = 7.3%-22.9%), in clinic 1 and 2, respectively. Increasing head height asymmetry after an initial PDN block did not predict localization of the cause of forelimb lameness or specific diagnosis (p = 0.1), other than indicating that it is unlikely to be in the foot (p = 0.02). MAIN LIMITATIONS Study samples consisted primarily of Warmbloods (clinic 1) and Quarter Horses (clinic 2). Analysis of blocking induced changes was limited to straight line trot only. CONCLUSIONS Increasing head height asymmetry after PDN block is common during forelimb lameness evaluations. Other than indicating that the cause of lameness is more proximal in the blocked forelimb, this does not help determine the final diagnosis.
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Affiliation(s)
| | | | - Joanne Kramer
- Veterinary Health Center, Clydesdale Hall, Department of Veterinary Medicine and Surgery, University of Missouri, Columbia, Missouri, USA
| | - Megan J McCracken
- Veterinary Health Center, Clydesdale Hall, Department of Veterinary Medicine and Surgery, University of Missouri, Columbia, Missouri, USA
| | - Shannon K Reed
- Veterinary Health Center, Clydesdale Hall, Department of Veterinary Medicine and Surgery, University of Missouri, Columbia, Missouri, USA
- Veterinary Health Center, Clydesdale Hall, Department of Food Animal Medicine and Surgery, University of Missouri, Missouri, USA
| | - Kevin G Keegan
- Veterinary Health Center, Clydesdale Hall, Department of Veterinary Medicine and Surgery, University of Missouri, Columbia, Missouri, USA
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32
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Al Aiyan A, King FC, Aldarwich A, Kishore U, Shawaf T. Arthrocentesis approaches to the phalangeal joints of the one humped camel (Camelus dromedarius). Sci Rep 2023; 13:17354. [PMID: 37833397 PMCID: PMC10576090 DOI: 10.1038/s41598-023-44391-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 10/07/2023] [Indexed: 10/15/2023] Open
Abstract
Irrespective of the exceptional adaptation of dromedaries to harsh environmental conditions, they remain highly susceptible to joint lameness resulting from a range of diverse factors and conditions. The joints most often affected by traumatic osteoarthritis in dromedaries are the metacarpophalangeal and metatarsophalangeal joints. A comprehensive understanding of joint anatomy and topography of the dromedary is required to perform arthrocentesis correctly on affected joints. Forty-two distal limbs were taken from 28 camels and studied by gross dissection, casting, ultrasonography, and computed tomography (CT). Representative three-dimensional models of the joint cavities, recesses, and pouches were obtained using different casting agents. This study provides a detailed description of dorsally, axially, and abaxially positioned joint recesses, as well as palmar/plantar positioned joint pouches. The safety and feasibility of the different arthrocentesis approaches were evaluated. The traditional dorsal arthrocentesis approach of the metacarpophalangeal, metatarsophalangeal, proximal interphalangeal, and distal interphalangeal joints, has limitations due to the risk of damaging the tendon structures and articular cartilage, which can lead to joint degeneration. A lateral arthrocentesis approach via the proximal palmar/plantar pouches of the metacarpophalangeal/metatarsophalangeal and proximal interphalangeal joints is recommended. This approach eliminates the potential needle injury to the articulating joint cartilage and other surrounding joint structures, such as tendons, blood vessels, and nerves.
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Affiliation(s)
- Ahmad Al Aiyan
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, UAE.
| | - Fransina Christina King
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, UAE
| | - Adnan Aldarwich
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, UAE
| | - Uday Kishore
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, UAE
| | - Turke Shawaf
- Department of Clinical Sciences, College of Veterinary Medicine, King Faisal University, Al-Hasa, Saudi Arabia
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Flisiński P, Badura M, Szpinda M. Superficial brachioulnar artery in man. Folia Morphol (Warsz) 2023; 82:936-942. [PMID: 37822068 DOI: 10.5603/fm.97261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/11/2023] [Accepted: 09/26/2023] [Indexed: 10/13/2023]
Abstract
The individual arterial pattern of the upper limb is considerably variable (11-24%) and relevant for intraarterial interventions performed by cardiologists, plastic and vascular surgeons, radiologists, anaesthesiologists, transplant specialists, orthopaedists and neurosurgeons. Arterial variants in the upper limb result from modifications in the maintenance and regression of the initial capillary plexus, which forms dominant arterial channels and gradually expands into the growing upper limb bud between stages 12 and 21. In this case report we present the superficial brachioulnar artery with its external diameter of 3 mm and length of 525 mm, and of relevant course in the left upper limb of a 78-year-old male Caucasian formalin-fixed cadaver. The superficial brachioulnar artery unusually started with the superior part of axillary artery, presented the following five parts: axillary, brachial, cubital, antebrachial and palmar, and was finally continuous with the superficial palmar arch. The typical ulnar artery was somewhat hypoplastic and limited to the forearm. To the best of our knowledge, this is the first report in the professional literature to describe the start of the superficial brachioulnar artery with the superior part of axillary artery. We conclude the individual arterial pattern of the upper limb to be indispensably recognised preoperatively, so as to circumvent any unwanted injuries to the superficial brachioulnar artery that is considerably large, overlies the antebrachial fascia and supplies the superficial palmar arch.
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Affiliation(s)
- P Flisiński
- Department of Anatomy, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland
| | - M Badura
- Department of Anatomy, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland
| | - M Szpinda
- Department of Anatomy, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland.
- Medical Faculty, Academy of Applied Medical and Social Sciences, Elblag, Poland.
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Byström A, Hardeman AM, Engell MT, Swagemakers JH, Koene MHW, Serra-Bragança FM, Rhodin M, Hernlund E. Normal variation in pelvic roll motion pattern during straight-line trot in hand in warmblood horses. Sci Rep 2023; 13:17117. [PMID: 37816848 PMCID: PMC10564842 DOI: 10.1038/s41598-023-44223-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 10/05/2023] [Indexed: 10/12/2023] Open
Abstract
In horses, hip hike asymmetry, i.e. left-right difference in hip upwards movement during hind limb protraction in trot, is a crucial lameness sign. Vertical hip movements are complex, influenced by both pelvic roll and pelvic vertical motion. Veterinarians find it challenging to identify low-grade lameness, and knowledge of normal variation is a prerequisite for discerning abnormalities. This study, which included 100 clinically sound Warmblood horses, aimed to describe normal variation in pelvic roll stride patterns. Data were collected during straight-line trot in hand using optical motion capture. Stride-segmented pelvic roll data, normalised with respect to time (0-100% of the stride) and amplitude (± 0.5 of horse average stride range of motion), were modelled as a linear combination of sine and cosine curves. A sine curve with one period per stride and a cosine curve with three periods per stride explained the largest proportions of roll motion: model estimate 0.335 (p < 0.01) and 0.138 (p < 0.01), respectively. Using finite mixture models, the horses could be separated into three groups sharing common pelvic roll characteristics. In conclusion, pelvic roll motion in trot follows a similar basic pattern in most horses, yet there is significant individual variation in the relative prominence of the most characteristic features.
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Affiliation(s)
- A Byström
- Department of Animal Environment and Health, Section of Ethology and Animal Welfare, Swedish University of Agricultural Sciences, Uppsala, Sweden.
| | - A M Hardeman
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - M T Engell
- Department of Companion Animal Clinical Sciences, Faculty of Veterinary Medicine, Equine Teaching Hospital, Norwegian University of Life Sciences, Oslo, Norway
| | | | | | - F M Serra-Bragança
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - M Rhodin
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - E Hernlund
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
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Valverde A, Cribb N, Arroyo L. Morphine concentrations in distal thoracic limb synovial fluid following intravenous regional limb perfusion in horses. Can J Vet Res 2023; 87:254-259. [PMID: 37790266 PMCID: PMC10542951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 07/04/2023] [Indexed: 10/05/2023]
Abstract
Twelve adult horses were randomly assigned to 2 groups in a prospective experimental trial. A pneumatic tourniquet (425 mmHg) was placed, under sedation, proximal to the carpus on one randomly chosen thoracic limb. A cephalic vein catheter was placed distal to the tourniquet to establish an intravenous regional limb perfusion technique (IVRLP) with morphine (0.1 mg/kg) diluted with saline 0.9% to 0.1 mL/kg, and the tourniquet left in place for 30 minutes. Horses were euthanized at 1 h (Group I) or 6 h (Group II) following the IVRLP and synovial fluid from the radiocarpal, intercarpal, metacarpophalangeal, distal interphalangeal, and digital flexor tendon sheath was obtained from the injected and contralateral (control) limb immediately after. Morphine concentrations were determined using liquid chromatography-mass spectrometry. An unpaired t-test was used to compare morphine concentrations from both groups (P < 0.05). Synovial morphine concentrations were detected in the injected limb in all horses in Group I, except in one horse in the radiocarpal joint, and detected in 5 of 6 horses in Group II. Mean synovial concentrations ranged between 301.8 ± 192.3 and 608 ± 446.6 ng/mL in Group I and between 27.0 ± 17.7 and 136.8 ± 103.6 ng/mL in Group II and were significantly higher in Group I between paired anatomical sites of both groups for the radiocarpal and distal interphalangeal joints, and the digital flexor tendon sheath. In conclusion, concentrations of morphine after IVRLP can be detected in synovial fluid distal to the tourniquet at 1 and 6 hours in horses.
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Affiliation(s)
- Alexander Valverde
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1
| | - Nicola Cribb
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1
| | - Luis Arroyo
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1
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36
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Marek RD. A surrogate forelimb: Evolution, function and development of the avian cervical spine. J Morphol 2023; 284:e21638. [PMID: 37708511 DOI: 10.1002/jmor.21638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/17/2023] [Accepted: 08/21/2023] [Indexed: 09/16/2023]
Abstract
The neck is a critical portion of the avian spine, one that works in tandem with the beak to act as a surrogate forelimb and allows birds to manipulate their surroundings despite the lack of a grasping capable hand. Birds display an incredible amount of diversity in neck morphology across multiple anatomical scales-from varying cervical counts down to intricate adaptations of individual vertebrae. Despite this morphofunctional disparity, little is known about the drivers of this enormous variation, nor how neck evolution has shaped avian macroevolution. To promote interest in this system, I review the development, function and evolution of the avian cervical spine. The musculoskeletal anatomy, basic kinematics and development of the avian neck are all documented, but focus primarily upon commercially available taxa. In addition, recent work has quantified the drivers of extant morphological variation across the avian neck, as well as patterns of integration between the neck and other skeletal elements. However, the evolutionary history of the avian cervical spine, and its contribution to the diversification and success of modern birds is currently unknown. Future work should aim to broaden our understanding of the cervical anatomy, development and kinematics to include a more diverse selection of extant birds, while also considering the macroevolutionary drivers and consequences of this important section of the avian spine.
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Affiliation(s)
- Ryan D Marek
- Department of Cell and Developmental Biology, Centre for Integrative Anatomy, University College London, London, UK
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Melchor RN, Feola SF, Cardonatto MC, Espinoza N, Rojas-Manriquez MA, Herazo L. First terror bird footprints reveal functionally didactyl posture. Sci Rep 2023; 13:16474. [PMID: 37777554 PMCID: PMC10542783 DOI: 10.1038/s41598-023-43771-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 09/28/2023] [Indexed: 10/02/2023] Open
Abstract
Terror birds (Aves, Phorusrhacidae) comprise the most outstanding group of South American Cenozoic avifauna, and have been considered dominant predators. Terrestrial habits were inferred using the reduction of their forelimbs and high body mass. Phorusrhacids were considered functionally tridactyl with three relatively short digits II-IV and a small, elevated digit I. The function of the ungual phalanges of digit II have been debated, including the utility of the ungual for retention or stabbing of prey. Incomplete or lack of preservation of foot bones have hampered understanding of the evolution and diversification of Phorusrhacidae. Here we show the first known and well-preserved footprints of Phorusrhacidae with a didactyl posture, which are named Rionegrina pozosaladensis igen. et isp. nov. These footprints yield unprecedented information on the locomotor habits of the group. The finding implies that medium-sized, Late Miocene (~ 8 Ma) phorusrhacids developed strong cursorial adaptations; achieved through reduction of digit II, raised metatarso-phalangeal pad, main body support in a large and thick digit III, and digit IV as outrigger. Raised and long claw of digit II was probably used in pining of prey. Phorusrhacid footprints differ from the Early Cretaceous didactyl footprints of deinonychosaurian dinosaur affinity by its larger size and strong mesaxony.
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Affiliation(s)
- Ricardo N Melchor
- Instituto de Ciencias de la Tierra y Ambientales de La Pampa, Universidad Nacional de La Pampa and Consejo Nacional de Investigaciones Científicas y Técnicas, Santa Rosa, La Pampa, Argentina.
- Departamento de Geología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Santa Rosa, La Pampa, Argentina.
| | - Silverio F Feola
- Instituto de Ciencias de la Tierra y Ambientales de La Pampa, Universidad Nacional de La Pampa and Consejo Nacional de Investigaciones Científicas y Técnicas, Santa Rosa, La Pampa, Argentina
- Departamento de Geología, Universidad Nacional del Sur, Av. Alem 1253, 8000, Bahía Blanca, Argentina
| | - M Cristina Cardonatto
- Departamento de Geología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Santa Rosa, La Pampa, Argentina
| | - Nahuel Espinoza
- Instituto de Ciencias de la Tierra y Ambientales de La Pampa, Universidad Nacional de La Pampa and Consejo Nacional de Investigaciones Científicas y Técnicas, Santa Rosa, La Pampa, Argentina
| | - Manuel A Rojas-Manriquez
- Instituto de Ciencias de la Tierra y Ambientales de La Pampa, Universidad Nacional de La Pampa and Consejo Nacional de Investigaciones Científicas y Técnicas, Santa Rosa, La Pampa, Argentina
| | - Lorena Herazo
- LA. TE. Andes S.A., Las Moreras 510, Vaqueros, Salta, Argentina
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Ruiz AD, Malley KM, Danaphongse TT, Ahmad FN, Mota Beltran C, Rennaker RL, Kilgard MP, Hays SA. Effective Delivery of Vagus Nerve Stimulation Requires Many Stimulations Per Session and Many Sessions Per Week Over Many Weeks to Improve Recovery of Somatosensation. Neurorehabil Neural Repair 2023; 37:652-661. [PMID: 37694568 PMCID: PMC10523825 DOI: 10.1177/15459683231197412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
BACKGROUND Chronic sensory loss is a common and undertreated consequence of many forms of neurological injury. Emerging evidence indicates that vagus nerve stimulation (VNS) delivered during tactile rehabilitation promotes recovery of somatosensation. OBJECTIVE Here, we characterize the amount, intensity, frequency, and duration of VNS therapy paradigms to determine the optimal dosage for VNS-dependent enhancement of recovery in a model of peripheral nerve injury (PNI). METHODS Rats underwent transection of the medial and ulnar nerves in the forelimb, resulting in chronic sensory loss in the paw. Eight weeks after injury, rats were implanted with a VNS cuff and received tactile rehabilitation sessions consisting of repeated mechanical stimulation of the previously denervated forepaw paired with short bursts of VNS. Rats received VNS therapy in 1 of 6 systematically varied dosing schedules to identify a paradigm that balanced therapy effectiveness with a shorter regimen. RESULTS Delivering 200 VNS pairings a day 4 days a week for 4 weeks produced the greatest percent improvement in somatosensory function compared to any of the 6 other groups (One Way analysis of variance at the end of therapy, F[4 70] P = .005). CONCLUSIONS Our findings demonstrate that an effective VNS therapy dosage delivers many stimulations per session, with many sessions per week, over many weeks. These results provide a framework to inform the development of VNS-based therapies for sensory restoration.
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Affiliation(s)
- Andrea D. Ruiz
- Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, USA
- Erik Jonsson School of Engineering and Computer Science, The University of Texas at Dallas, Richardson, TX, USA
| | - Kaitlyn M. Malley
- Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, USA
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Tanya T. Danaphongse
- Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, USA
| | - Fatima N. Ahmad
- Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, USA
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Clareth Mota Beltran
- Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, USA
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Robert L. Rennaker
- Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, USA
- Erik Jonsson School of Engineering and Computer Science, The University of Texas at Dallas, Richardson, TX, USA
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Michael P. Kilgard
- Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, USA
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Seth A. Hays
- Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, USA
- Erik Jonsson School of Engineering and Computer Science, The University of Texas at Dallas, Richardson, TX, USA
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Kawahisa-Piquini G, Bass LD, Pezzanite LM, Moorman VJ. Effect of age at training initiation on hoof morphology and lameness in juvenile American Quarter Horses. Equine Vet J 2023; 55:765-776. [PMID: 36572927 PMCID: PMC10291006 DOI: 10.1111/evj.13913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 12/01/2022] [Indexed: 12/28/2022]
Abstract
BACKGROUND Lameness, discipline, training intensity, environmental variability, and shoeing are all factors demonstrated to affect hoof loading and therefore act as adaptive stimuli to alter hoof morphology. OBJECTIVES To evaluate the effect of age at training initiation on hoof morphology and lameness incidence and determine if specific hoof morphology measurements correlate with lameness in juvenile American Quarter Horses. STUDY DESIGN Prospective cohort study. METHODS American Quarter Horses (n = 42; 29 two-year-olds, 13 three-year-olds) entering training were monitored for hoof morphology and lameness over 6 months (months 0, 2, 4, and 6). Hoof measurements (palmar/plantar angles, frog base width/length, toe length/angle, heel length/angle, heel and foot width, wall height/angle) from radiographs and photographs were recorded. Lameness was graded subjectively and objectively (Lameness locator®). Statistical analyses were performed with Fisher's exact test and repeated measures ANOVA with p < 0.05. RESULTS 25/42 horses developed subclinical lameness (16/42 forelimb, 19/42 hindlimb), with 3-year-olds developing lameness more frequently compared to 2-year-olds overall (p = 0.04; 84.6 vs. 48.3%) and in forelimbs (p = 0.05; 61.5% vs. 27.6%); no difference was noted between 2- versus 3-year-olds in hindlimbs (p = 0.2; 61.5% vs. 37.9%). In lame versus sound forelimbs, 3-year-olds had decreased foot width (p = 0.03; 11.48 cm [CI 10.68-12.28] vs. 12.21 cm [CI 11.99-12.42]), decreased toe length (p = 0.03; 6.02 cm [CI 5.69-6.36] vs. 6.45 cm [CI 6.32-6.58]), shorter lateral wall height (p = 0.03; 4.64 cm [CI 4.31-4.96] vs. 5.11 cm [CI 5.03-5.2]), and shorter medial wall height (p = 0.02; 4.58 cm [CI 4.06-5.10] vs. 5.15 cm [CI 4.99-5.30]). In lame versus sound hindlimbs, horses overall (p = 0.05; 3.74, CI 3.53-3.96 vs. 3.55, CI 3.48-3.61) and 3-year-olds had longer heels p = 0.01; 3.90 cm (CI 3.5-4.3) vs. 3.50 cm (CI 3.39-3.61). MAIN LIMITATIONS Small sample size, lack of control group not entering training. CONCLUSIONS Three-year-old American Quarter Horses entering training were more likely to develop forelimb lameness than 2-year-olds. This subclinical lameness was associated with specific hoof morphology characteristics (decreased foot width, toe length, heel length, and lateral/medial wall height; greater toe angle).
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Affiliation(s)
- Gabriella Kawahisa-Piquini
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Luke D Bass
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Lynn M Pezzanite
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Valerie J Moorman
- Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
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Sokołowski J, Janicka K, Zięba G, Junkuszew A, Rozempolska-Rucińska I. Effect of gentle physical contact on behavioural indicators in sheep. Animal 2023; 17:100924. [PMID: 37611436 DOI: 10.1016/j.animal.2023.100924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 07/17/2023] [Accepted: 07/20/2023] [Indexed: 08/25/2023] Open
Abstract
The available literature provides ample evidence for the importance of gentle treatment and handling of farm animals for the establishment of relationships with humans. The present study is an attempt to verify the assumption that massage can be a tool for building sheep-human relationships and to determine the impact of this technique on the behaviour of lambs. In total, 40 3-week-old lambs (20 ewes of the synthetic prolific-meat line (BCP) and 20 Świniarka breed ewes) were assigned to two control groups (BCP, Świniarka) and two experimental groups (BCP, Świniarka). The lambs from the experimental groups received modified Shantala massage. During each session, the zoophysiotherapists massaged the chest, forelimbs, abdomen, hindlimbs, back, and face always in the same way and the same order. The massage was applied three times a day (at fixed times) for 21 consecutive days. Based on the behaviour manifested by the lambs during the massage sessions, a 2-point scale was developed for assessment of the animals from the research groups. After the massage, behavioural tests with the participation of a human, a dog, and a novel object were carried out for three consecutive days. Behaviours indicating curiosity (frequency of interaction, time of direct contact, latency) and fear (frequency of climbing and attempts to escape, duration of vocalisation) were assessed. The behavioural tests revealed significant differences in the behaviour of massaged and non-massaged lambs of both breeds, which confirms that the massage has a modifying effect on the behaviour of these animals. The influence of the applied technique was reflected by an increase in curiosity and a reduced level of fear.
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Affiliation(s)
- J Sokołowski
- Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, Akademicka 13 Street, 20-950 Lublin, Poland
| | - K Janicka
- Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, Akademicka 13 Street, 20-950 Lublin, Poland.
| | - G Zięba
- Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, Akademicka 13 Street, 20-950 Lublin, Poland
| | - A Junkuszew
- Department of Animal Breeding and Agricultural Consulting, University of Life Sciences in Lublin, Akademicka 13 Street, 20-950 Lublin, Poland
| | - I Rozempolska-Rucińska
- Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, Akademicka 13 Street, 20-950 Lublin, Poland
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Mokry A, Bernhard C, Faulkner J, Colgate VA, Dumoulin M, Pille F, Vanderperren K, Delling U, Oosterlinck M. Clinical and imaging findings, treatment details and outcomes in foals with extensor tendon rupture-A multicentre retrospective study. Equine Vet J 2023; 55:777-787. [PMID: 36223233 DOI: 10.1111/evj.13893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 10/02/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Forelimb extensor tendon rupture (ETR) in foals is sparsely documented. OBJECTIVES To describe clinical and imaging findings, treatment details, and long-term outcome in foals with ETR. STUDY DESIGN Multicentre retrospective case-series. METHODS Clinical record review of foals with ETR, presented to Faculty of Veterinary Medicine at Ghent University (Belgium), the Clinic for Horses at the University of Veterinary Medicine Hannover (Germany), and Rossdales Equine Hospital (UK) between 2009-2021. Long-term outcome based on structured telephone interview with the owner at the university hospitals and on future ratings from a public racing results archive at Rossdales Equine Hospital. RESULTS Eight foals (28%; 95%CI: 11.7%-44.3%) presented with ETR only, whereas 21 foals (72%; 95%CI: 55.7%-88.3%) presented with ETR and concurrent flexural limb deformity foals with ETR only were older (median 20 days; Interquartile range [IQR] 13-22) than foals with ETR and flexural limb deformity (median five days; IQR 3-11; p = 0.001). Treatment included medical support, immobilization, and box rest. Hospitalisation time was longer for foals with ETR and flexural limb deformity (median 26 days; IQR 16-44) than for ETR-only foals (median 11 days; IQR 6-16; p = 0.03). Total rehabilitation time was longer for foals with ETR and flexural limb deformity (median 58 days; IQR 42-91) than for foals without flexural limb deformity (median 32 days; IQR 12-39; p = 0.03). Six foals (21%; 95%CI: 6.3%-35.7%) were euthanased within seven months: three because of problems with limb protraction and progressive flexural limb deformity. Long-term follow-up (>18 months) was available for two cases with ETR only, and seven cases with ETR and flexural limb deformity. Both ETR-only foals had a positive cosmetic outcome but only one a positive functional outcome. Foals with ETR and concurrent flexural limb deformity suffered limitations regarding cosmetic appearance (5/7 negative) and limb function (7/7 negative). MAIN LIMITATIONS Small sample size, retrospective study, and no clinical follow-up. CONCLUSIONS ETR is a rare condition in this sample of foals treated under hospital conditions often requiring prolonged care, especially with concurrent flexural limb deformity. Further research should investigate potential associations with future athletic performance.
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Affiliation(s)
- Anna Mokry
- Faculty of Veterinary Medicine, Department of Large Animal Surgery, Anaesthesia and Orthopaedics, Ghent University, Merelbeke, Belgium
| | - Camille Bernhard
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Josephine Faulkner
- Faculty of Veterinary Medicine, Department of Morphology, Imaging, Orthopedics, Rehabilitation and Nutrition, Ghent University, Merelbeke, Belgium
| | | | - Michèle Dumoulin
- Faculty of Veterinary Medicine, Department of Large Animal Surgery, Anaesthesia and Orthopaedics, Ghent University, Merelbeke, Belgium
| | - Frederik Pille
- Faculty of Veterinary Medicine, Department of Large Animal Surgery, Anaesthesia and Orthopaedics, Ghent University, Merelbeke, Belgium
| | - Katrien Vanderperren
- Faculty of Veterinary Medicine, Department of Morphology, Imaging, Orthopedics, Rehabilitation and Nutrition, Ghent University, Merelbeke, Belgium
| | - Uta Delling
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Maarten Oosterlinck
- Faculty of Veterinary Medicine, Department of Large Animal Surgery, Anaesthesia and Orthopaedics, Ghent University, Merelbeke, Belgium
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Day M, Gibb R, Kolb B. Tactile stimulation facilitates functional recovery and dendritic change following neonatal hemidecortication in rats. Behav Brain Res 2023; 452:114582. [PMID: 37454933 DOI: 10.1016/j.bbr.2023.114582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/06/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
After large neocortical lesions, such as hemidecortication, children can show significant motor and cognitive impairments. It thus is of considerable interest to identify treatments that might enhance long-term functional outcome. We have previously shown that tactile stimulation enhances recovery from perinatal focal cortical lesions in rats, so the goal of the present experiment was to explore the effectiveness of postlesion tactile stimulation in reducing functional deficits associated with neonatal hemidecortication. Rats were given hemidecortications on postnatal day 10 (P10). Half of the group was then exposed to a daily tactile stimulation treatment for 15 min, three times a day for eleven days following the surgery. All groups were then tested on a number of behavioural tasks (Morris water task, skilled reaching, forelimb placing during spontaneous vertical exploration, and a sunflower seed opening task) beginning at P 120. The brains of the male animals were prepared for Golgi-Cox staining and subsequent analysis of dendritic arborisation and spine density. There were two main findings in this experiment: 1) Tactile stimulation improved cognitive ability and some motor performance after P 10 hemidecortication; and, 2) Tactile stimulation altered cortical organization after P10 hemidecortication. Tactile stimulation may provide an important noninvasive therapy after hemispherectomy in children.
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Affiliation(s)
- Morgan Day
- Dept of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
| | - Robbin Gibb
- Dept of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
| | - Bryan Kolb
- Dept of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada.
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Metral C, Helmer P, Gronsky S, Rush EM. Right axillary mass and decreased motor function in the right forelimb in a 5-year-old female bearded dragon. J Am Vet Med Assoc 2023; 261:1-2. [PMID: 36977483 DOI: 10.2460/javma.23.01.0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 03/15/2023] [Indexed: 03/29/2023]
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Farrell M, Singh A, Larose P, Stine S, Hawker W, Kornya M. Application of a distant, direct, single-pedicle hinge flap for reconstruction of a circumferential cutaneous defect of the thoracic limb in a dog. Can Vet J 2023; 64:620-626. [PMID: 37397698 PMCID: PMC10286138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
A 4-year-old, neutered male, mixed-breed dog initially presented to a tertiary referral center for suspected mushroom intoxication and subsequent necrotizing fasciitis of the right thoracic limb. One day after presentation, a fasciotomy was carried out to remove necrotic tissue, leaving an extensive cutaneous defect spanning from axilla to carpus and occupying 75 to 100% of the circumference of the limb. Following establishment of a bed of granulation tissue, a distant, direct, single-pedicle flap was performed using the lateral thoracoabdominal skin. The limb was flexed at the shoulder and secured to the body wall during flap healing. Staged division of the flap was initiated 20 d after flap harvesting and completed 3 d later. Complete reconstruction of the large circumferential cutaneous defect was obtained 56 d after initial presentation. No major complications were encountered. At 387 d postoperatively, the dog had clinically normal limb function and was free of lameness. Key clinical message: This case report demonstrates the successful use of a distant, direct, single-pedicle hinge flap for reconstruction of a large thoracic limb wound spanning from axilla to carpus in a dog. This technique should be considered a viable limb-sparing, surgical option for resolution of extensive cutaneous thoracic limb wounds.
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Affiliation(s)
- Makayla Farrell
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1
| | - Ameet Singh
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1
| | - Philippe Larose
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1
| | - Samantha Stine
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1
| | - William Hawker
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1
| | - Matthew Kornya
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1
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Sack D, Canapp D, Canapp S, Majeski S, Curry J, Sutton A, Cullen R. Iliopsoas strain demographics, concurrent injuries, and grade determined by musculoskeletal ultrasound in 72 agility dogs. Can J Vet Res 2023; 87:196-201. [PMID: 37397635 PMCID: PMC10291697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 01/09/2023] [Indexed: 07/04/2023]
Abstract
The objective of this study was to describe patient demographics associated with iliopsoas strains, frequency of common concurrent injuries, and associated strain grades based on musculoskeletal ultrasound. The medical records of 72 client-owned agility dogs that had an iliopsoas musculoskeletal ultrasound (MSK-US) between 2009 and 2015 were retrospectively reviewed. Analyses included patient signalment, physical examination, and diagnostic findings. Twenty-four breeds of canine athletes from 1.5 to 10 y old (median: 5 y, SD: 2.2 y) were included in the study. Of the 72 records reviewed, border collies were the most common breed (27.8%, 20/72) reported. Isolated iliopsoas strains occurred in 26.4% (19/72) of cases. Concurrent pathology was noted in 73.6% (53/72) of cases. Cranial cruciate ligament (CCL) instability was the most common concurrent pathology, representing 27.8% (20/72) of all cases, with hip (8.3%, 6/72), lumbosacral (23.6%, 17/72), other non-CCL hind limb (6.9%, 5/72), and forelimb (6.9%, 5/72) pathologies making up the remainder of cases with concurrent pathology. In patients with a concurrent hind limb injury, 96.7% (30/31) of dogs had their most severe iliopsoas strain grade on the same limb. MSK-US revealed Grade I strains in 54.2%, Grade II strains in 22.2%, Grade III strains in 5.2%, and chronic changes in 18.1% of cases. There were no statistically significant associations between iliopsoas strain grade and age, body weight, sex, breed, concurrent pathology, anatomic location of concurrent pathology, or sidedness of concurrent pathology. Iliopsoas strains are one of the most common agility dog injuries; however, patient demographics, prevalence of concurrent injury and correlation with MSK-US findings have not been previously reported. To the authors' knowledge, this is the first retrospective analysis reporting iliopsoas strain demographics, concurrent injury frequency and correlation with MSK-US evaluation in agility dogs. Although 26.4% of iliopsoas strains occurred as isolated injuries, 73.6% had concurrent injuries, with CCL instability present most commonly, occurring in 27.8% of cases. Dogs should be thoroughly evaluated for concurrent injuries when presenting with an iliopsoas strain.
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Affiliation(s)
- Danny Sack
- Veterinary Orthopedic and Sports Medicine Group, 10975 Guilford Road Ste B, Annapolis Junction, Maryland 20701, USA (Sack, Canapp D, Canapp S, Majeski, Curry, Cullen); Canapp Sports Medicine, 6030 Daybreak Circle, Clarksville, Maryland 21029, USA (Canapp D, Canapp S, Sutton)
| | - Debra Canapp
- Veterinary Orthopedic and Sports Medicine Group, 10975 Guilford Road Ste B, Annapolis Junction, Maryland 20701, USA (Sack, Canapp D, Canapp S, Majeski, Curry, Cullen); Canapp Sports Medicine, 6030 Daybreak Circle, Clarksville, Maryland 21029, USA (Canapp D, Canapp S, Sutton)
| | - Sherman Canapp
- Veterinary Orthopedic and Sports Medicine Group, 10975 Guilford Road Ste B, Annapolis Junction, Maryland 20701, USA (Sack, Canapp D, Canapp S, Majeski, Curry, Cullen); Canapp Sports Medicine, 6030 Daybreak Circle, Clarksville, Maryland 21029, USA (Canapp D, Canapp S, Sutton)
| | - Stephanie Majeski
- Veterinary Orthopedic and Sports Medicine Group, 10975 Guilford Road Ste B, Annapolis Junction, Maryland 20701, USA (Sack, Canapp D, Canapp S, Majeski, Curry, Cullen); Canapp Sports Medicine, 6030 Daybreak Circle, Clarksville, Maryland 21029, USA (Canapp D, Canapp S, Sutton)
| | - Jeff Curry
- Veterinary Orthopedic and Sports Medicine Group, 10975 Guilford Road Ste B, Annapolis Junction, Maryland 20701, USA (Sack, Canapp D, Canapp S, Majeski, Curry, Cullen); Canapp Sports Medicine, 6030 Daybreak Circle, Clarksville, Maryland 21029, USA (Canapp D, Canapp S, Sutton)
| | - Angela Sutton
- Veterinary Orthopedic and Sports Medicine Group, 10975 Guilford Road Ste B, Annapolis Junction, Maryland 20701, USA (Sack, Canapp D, Canapp S, Majeski, Curry, Cullen); Canapp Sports Medicine, 6030 Daybreak Circle, Clarksville, Maryland 21029, USA (Canapp D, Canapp S, Sutton)
| | - Robert Cullen
- Veterinary Orthopedic and Sports Medicine Group, 10975 Guilford Road Ste B, Annapolis Junction, Maryland 20701, USA (Sack, Canapp D, Canapp S, Majeski, Curry, Cullen); Canapp Sports Medicine, 6030 Daybreak Circle, Clarksville, Maryland 21029, USA (Canapp D, Canapp S, Sutton)
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Yan C, Ma H, Yang Y, Mi Z. Metabolic Adaption of Flexor Carpi Radialis to Amplexus Behavior in Asiatic Toads ( Bufo gargarizans). Int J Mol Sci 2023; 24:10174. [PMID: 37373324 PMCID: PMC10299559 DOI: 10.3390/ijms241210174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
Amplexus is a type of mating behavior among toads that is essential for successful external fertilization. Most studies have primarily focused on the behavioral diversity of amplexus, and less is known regarding the metabolic changes occurring in amplectant males. The aim of this study was to compare the metabolic profiles of amplectant Asiatic toad (Bufo gargarizans) males in the breeding period (BP group) and the resting males in the non-breeding period (NP group). A metabolomic analysis was conducted on the flexor carpi radialis (FCR), an essential forelimb muscle responsible for clasping during courtship. A total of 66 differential metabolites were identified between the BP and NP groups, including 18 amino acids, 12 carbohydrates, and 8 lipids, and they were classified into 9 categories. Among these differential metabolites, 13 amino acids, 11 carbohydrates, and 7 lipids were significantly upregulated in the BP group compared to the NP group. In addition, a KEGG (Kyoto Encyclopedia of Genes and Genomes) enrichment analysis identified 17 significant metabolic pathways, including ABC transporters, aminoacyl-tRNA biosynthesis, arginine biosynthesis, pantothenate and CoA biosynthesis, and fructose and mannose metabolism. These results suggest that amplectant male toads are metabolically more active than those during the non-breeding period, and this metabolic adaptation increases the likelihood of reproductive success.
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Affiliation(s)
| | | | | | - Zhiping Mi
- Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, Nanchong 637009, China; (C.Y.); (H.M.); (Y.Y.)
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Cleaver O. Communicating developmental biology - Gen Z takes the reins. Dev Biol 2023; 496:95-96. [PMID: 36841504 DOI: 10.1016/j.ydbio.2023.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Affiliation(s)
- Ondine Cleaver
- The University of Texas Southwestern Medical Center, Dallas, TX, USA.
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Zhang H, Liu J, Bingham D, Orr A, Kawabori M, Kim JY, Zheng Z, Lam TI, Massa SM, Swanson RA, Yenari MA. Use of Botulinum Toxin for Limb Immobilization for Rehabilitation in Rats with Experimental Stroke. Biomolecules 2023; 13:512. [PMID: 36979446 PMCID: PMC10046338 DOI: 10.3390/biom13030512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/07/2023] [Accepted: 03/09/2023] [Indexed: 03/15/2023] Open
Abstract
Motor rehabilitation strategies after unilateral stroke suggest that the immobilization of the healthy, unimpaired limb can promote the functional recovery of a paretic limb. In rodents, this has been modeled using casts, harnesses, and other means of restricting the use of the non-paretic forelimb in models of experimental stroke. Here, we evaluated an alternative approach, using botulinum toxin injections to limit the function of the non-paretic forelimb. Adult male rats were subjected to permanent ligation of the left distal middle cerebral artery, resulting in right forelimb paresis. The rats were then subjected to: (1) no treatment; (2) botulinum toxin injections 1 day post stroke; or (3) cast placement 5 days post stroke. Casts were removed after 5 weeks, while the botulinum toxin injection effectively immobilized subjects for approximately the same duration. Rats with bilateral forelimb impairment due to the stroke plus casting or botulinum injections were still able to feed and groom normally. Both immobilization groups showed modest recovery following the stroke compared to those that did not receive immobilization, but the casting approach led to unacceptable levels of animal stress. The botulinum toxin approach to limb immobilization had both advantages and disadvantages over traditional physical limb immobilization. The major advantage was that it was far less stress-inducing to the subject animals and appeared to be well tolerated. A disadvantage was that the paresis took roughly 10 weeks to fully resolve, and any degree of residual paresis could confound the interpretation of the behavioral assessments.
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Affiliation(s)
- Hongxia Zhang
- Department of Neurological Surgery, University of California, San Francisco, CA 94143, USA
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
| | - Jialing Liu
- Department of Neurological Surgery, University of California, San Francisco, CA 94143, USA
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
| | - Deborah Bingham
- Department of Neurological Surgery, University of California, San Francisco, CA 94143, USA
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
| | - Adrienne Orr
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
- Department of Neurology, University of California, San Francisco, CA 94143, USA
| | - Masahito Kawabori
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
- Department of Neurology, University of California, San Francisco, CA 94143, USA
- Department of Neurosurgery, Hokkaido University, Sapporo 060-0808, Japan
| | - Jong Youl Kim
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
- Department of Neurology, University of California, San Francisco, CA 94143, USA
- Department of Anatomy, Yonsei University, Seoul 03722, Republic of Korea
| | - Zhen Zheng
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
- Department of Neurology, University of California, San Francisco, CA 94143, USA
| | - Tina I. Lam
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
- Department of Neurology, University of California, San Francisco, CA 94143, USA
| | - Stephen M. Massa
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
- Department of Neurology, University of California, San Francisco, CA 94143, USA
| | - Raymond A. Swanson
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
- Department of Neurology, University of California, San Francisco, CA 94143, USA
| | - Midori A. Yenari
- San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
- Department of Neurology, University of California, San Francisco, CA 94143, USA
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Borrelli J, Creath R, Rogers MW. The timing and amplitude of the muscular activity of the arms preceding impact in a forward fall is modulated with fall velocity. J Biomech 2023; 150:111515. [PMID: 36867953 PMCID: PMC10257944 DOI: 10.1016/j.jbiomech.2023.111515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/16/2023] [Accepted: 02/21/2023] [Indexed: 03/05/2023]
Abstract
Protective arm reactions have been shown to be an important injury avoidance mechanism in unavoidable falls. Protective arm reactions have been shown to be modulated with fall height, however it is not clear if they are modulated with impact velocity. The aim of this study was to determine if protective arm reactions are modulated in response to a forward fall with an initially unpredictable impact velocity. Forward falls were evoked via sudden release of a standing pendulum support frame with adjustable counterweight to control fall acceleration and impact velocity. Thirteen younger adults (1 female) participated in this study. Counterweight load explained more than 89% of the variation of impact velocity. Angular velocity at impact decreased (p < 0.001), drop duration increased from 601 ms to 816 ms (p < 0.001), and the maximum vertical ground reaction force decreased from 64%BW to 46%BW (p < 0.001) between the small and large counterweight. Elbow angle at impact (129 degrees extension), triceps (119 ms) and biceps (98 ms) pre-impact time, and co-activation (57%) were not significantly affected by counterweight load (p-values > 0.08). Average triceps and biceps EMG amplitude decreased from 0.26 V/V to 0.19 V/V (p = 0.004) and 0.24 V/V to 0.11 V/V (p = 0.002) with increasing counterweight respectively. Protective arm reactions were modulated with fall velocity by reducing EMG amplitude with decreasing impact velocity. This demonstrates a neuromotor control strategy for managing evolving fall conditions. Future work is needed to further understand how the CNS deals with additional unpredictability (e.g., fall direction, perturbation magnitude, etc.) when deploying protective arm reactions.
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Affiliation(s)
- James Borrelli
- University of Maryland School of Medicine, Department of Physical Therapy and Rehabilitation Sciences, Baltimore, MD, USA.
| | - Robert Creath
- Lebanon Valley College, Exercise Science Department, Annville, PA, USA
| | - Mark W Rogers
- University of Maryland School of Medicine, Department of Physical Therapy and Rehabilitation Sciences, Baltimore, MD, USA
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Kalinowski MK, Bettag JM, Giakas JA, Joshi A, Pham MN, Yang JC, Maglasang MN, Tan Y, Daly D. Unique case of vascularization: superficial brachial artery and radial persistent median artery. Folia Morphol (Warsz) 2023; 83:207-214. [PMID: 36794686 DOI: 10.5603/fm.a2023.0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 02/17/2023]
Abstract
During a routine cadaveric dissection of a 93-year-old male donor, unique arterial variations were observed in the right upper extremity. This rare arterial branching pattern began at the third part of the axillary artery (AA), where it gave off a large superficial brachial artery (SBA) before bifurcating into the subscapular artery and a common stem. The common stem then gave off a division for the anterior and posterior circumflex humeral arteries, before continuing as a small brachial artery (BA). The BA terminated as a muscular branch to the brachialis muscle. The SBA bifurcated into a large radial artery (RA) and small ulnar artery (UA) in the cubital fossa. The UA branching pattern was atypical, giving off only muscular branches in the forearm and a deep UA before contributing to the superficial palmar arch (SPA). The RA provided the radial recurrent artery and a common trunk (CT) proximally before continuing its course to the hand. The CT from the RA gave off a branch that divided into anterior and posterior ulnar recurrent arteries, as well as muscular branches, before it bifurcated into the persistent median artery (PMA) and the common interosseous artery. The PMA anastomosed with the UA before entering the carpal tunnel and contributed to the SPA. This case presents a unique combination of arterial variations in the upper extremity and is clinically and pathologically relevant.
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Affiliation(s)
- Megan K Kalinowski
- Saint Louis University School of Medicine, Saint Louis, MO, United States.
| | - Jeffery M Bettag
- Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Julian A Giakas
- Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Ankita Joshi
- Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Minh N Pham
- Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - James C Yang
- Saint Louis University School of Medicine, Saint Louis, MO, United States
| | | | - Yun Tan
- Center for Anatomical Science and Education, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Daniel Daly
- Center for Anatomical Science and Education, Saint Louis University School of Medicine, Saint Louis, MO, United States
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