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Simon CM, Delestree N, Montes J, Gerstner F, Carranza E, Sowoidnich L, Buettner JM, Pagiazitis JG, Prat-Ortega G, Ensel S, Donadio S, Garcia JL, Kratimenos P, Chung WK, Sumner CJ, Weimer LH, Pirondini E, Capogrosso M, Pellizzoni L, De Vivo DC, Mentis GZ. Dysfunction of proprioceptive sensory synapses is a pathogenic event and therapeutic target in mice and humans with spinal muscular atrophy. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.06.03.24308132. [PMID: 38883729 PMCID: PMC11177917 DOI: 10.1101/2024.06.03.24308132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Spinal muscular atrophy (SMA) is a neurodegenerative disease characterized by a varying degree of severity that correlates with the reduction of SMN protein levels. Motor neuron degeneration and skeletal muscle atrophy are hallmarks of SMA, but it is unknown whether other mechanisms contribute to the spectrum of clinical phenotypes. Here, through a combination of physiological and morphological studies in mouse models and SMA patients, we identify dysfunction and loss of proprioceptive sensory synapses as key signatures of SMA pathology. We demonstrate that SMA patients exhibit impaired proprioception, and their proprioceptive sensory synapses are dysfunctional as measured by the neurophysiological test of the Hoffmann reflex (H-reflex). We further show that loss of excitatory afferent synapses and altered potassium channel expression in SMA motor neurons are conserved pathogenic events found in both severely affected patients and mouse models. Lastly, we report that improved motor function and fatigability in ambulatory SMA patients and mouse models treated with SMN-inducing drugs correlate with increased function of sensory-motor circuits that can be accurately captured by the H-reflex assay. Thus, sensory synaptic dysfunction is a clinically relevant event in SMA, and the H-reflex is a suitable assay to monitor disease progression and treatment efficacy of motor circuit pathology.
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Affiliation(s)
- CM Simon
- Center for Motor Neuron Biology and Disease, Columbia University, NY, USA
- Dept. of Neurology, Columbia University, NY, USA
- Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany
| | - N Delestree
- Center for Motor Neuron Biology and Disease, Columbia University, NY, USA
- Dept. of Neurology, Columbia University, NY, USA
| | - J Montes
- Center for Motor Neuron Biology and Disease, Columbia University, NY, USA
- Dept. of Rehabilitation and Regenerative Medicine, Columbia University, NY, USA
| | - F Gerstner
- Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany
| | - E Carranza
- Depts. Physical Medicine & Rehabilitation & Bioengineering, University of Pittsburgh, PA, USA
- Rehab and Neural Engineering Labs, University of Pittsburgh, PA, USA
| | - L Sowoidnich
- Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany
| | - JM Buettner
- Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany
| | - JG Pagiazitis
- Center for Motor Neuron Biology and Disease, Columbia University, NY, USA
- Dept. of Neurology, Columbia University, NY, USA
| | - G Prat-Ortega
- Rehab and Neural Engineering Labs, University of Pittsburgh, PA, USA
- Depts. of Neurological Surgery & Bioengineering, University of Pittsburgh, PA, USA
| | - S Ensel
- Rehab and Neural Engineering Labs, University of Pittsburgh, PA, USA
- Depts. of Neurological Surgery & Bioengineering, University of Pittsburgh, PA, USA
| | - S Donadio
- Rehab and Neural Engineering Labs, University of Pittsburgh, PA, USA
- Depts. of Neurological Surgery & Bioengineering, University of Pittsburgh, PA, USA
| | - JL Garcia
- Dept. of Neurology, Columbia University, NY, USA
| | - P Kratimenos
- Center for Neuroscience Research, Children’s National Res. Institute, Washington, DC, USA
- Dept. of Pediatrics, G Washington Univ. Sch. of Medicine, Washington, DC, USA
| | - WK Chung
- Dept. of Pediatrics, Boston Children’s Hospital and Harvard Medical School, Boston, MA USA
| | - CJ Sumner
- Depts. of Neurology, Neuroscience and Genetic Medicine, Johns Hopkins University School of Medicine, MD, USA
| | - LH Weimer
- Dept. of Neurology, Columbia University, NY, USA
| | - E Pirondini
- Depts. Physical Medicine & Rehabilitation & Bioengineering, University of Pittsburgh, PA, USA
- Rehab and Neural Engineering Labs, University of Pittsburgh, PA, USA
| | - M Capogrosso
- Rehab and Neural Engineering Labs, University of Pittsburgh, PA, USA
- Depts. of Neurological Surgery & Bioengineering, University of Pittsburgh, PA, USA
| | - L Pellizzoni
- Center for Motor Neuron Biology and Disease, Columbia University, NY, USA
- Dept. of Neurology, Columbia University, NY, USA
- Dept. of Pathology and Cell Biology, Columbia University, NY, USA
| | - DC De Vivo
- Center for Motor Neuron Biology and Disease, Columbia University, NY, USA
- Dept. of Neurology, Columbia University, NY, USA
| | - GZ Mentis
- Center for Motor Neuron Biology and Disease, Columbia University, NY, USA
- Dept. of Neurology, Columbia University, NY, USA
- Dept. of Pathology and Cell Biology, Columbia University, NY, USA
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Salles JI, Guimarães JM, Filho GM, Morrissey D. Effect of a specific exercise strategy on strength and proprioception in volleyball players with infraspinatus muscle atrophy. Scand J Med Sci Sports 2018; 28:2093-2099. [PMID: 29772095 DOI: 10.1111/sms.13216] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2018] [Indexed: 11/30/2022]
Abstract
Infraspinatus muscle atrophy is common in professional volleyball players, but it is unclear whether commonly observed strength and proprioception deficits can be reversed with training. Fifty-four participants were recruited into an infraspinatus atrophy group (IAG, n = 18) and a non-atrophy group (NAG, n = 18) of elite volleyballers plus a healthy non-athletic control group (CG, n = 18). IAG were trained with a progressive, specific shoulder external rotator strengthening routine for 32 sessions over 8 weeks. Shoulder external rotation peak torque (SERPT) and threshold to detect passive movement (TTDPM) and joint position sense (JPS) were measured before and after the intervention. At baseline, no significant difference was detected in strength or proprioception between the injured and control groups, but the normal athletes were stronger and had better proprioception than either IAG or CG (P < .001). IAG (d = 2.78) and NAG (d = 0.442) improved strength significantly after training. IAG improved TTDM and JPS (P < .001, d = -0.719 and -2.942, respectively) but were still worse than NAG (P < .001). Elite volleyball players with Infraspinatus muscle atrophy have strength and proprioception deficits which can be improved by a specific exercise program to normal but not elite athlete control levels.
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Affiliation(s)
- J I Salles
- Sports and Exercise Medicine, William Harvey Research Institute, Queen Mary University of London, London, UK.,Fédération Internationale de Volleyball (FIVB) Coach Commission, Lausanne, Switzerland
| | - J M Guimarães
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, RJ, Brazil
| | - G M Filho
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, RJ, Brazil
| | - D Morrissey
- Sports and Exercise Medicine, William Harvey Research Institute, Queen Mary University of London, London, UK.,Phyisotherapy Department, Barts Health NHS Trust, London, UK
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Contu S, Hussain A, Kager S, Budhota A, Deshmukh VA, Kuah CWK, Yam LHL, Xiang L, Chua KSG, Masia L, Campolo D. Proprioceptive assessment in clinical settings: Evaluation of joint position sense in upper limb post-stroke using a robotic manipulator. PLoS One 2017; 12:e0183257. [PMID: 29161264 PMCID: PMC5697829 DOI: 10.1371/journal.pone.0183257] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 08/01/2017] [Indexed: 11/18/2022] Open
Abstract
Proprioception is a critical component for motor functions and directly affects motor learning after neurological injuries. Conventional methods for its assessment are generally ordinal in nature and hence lack sensitivity. Robotic devices designed to promote sensorimotor learning can potentially provide quantitative precise, accurate, and reliable assessments of sensory impairments. In this paper, we investigate the clinical applicability and validity of using a planar 2 degrees of freedom robot to quantitatively assess proprioceptive deficits in post-stroke participants. Nine stroke survivors and nine healthy subjects participated in the study. Participants’ hand was passively moved to the target position guided by the H-Man robot (Criterion movement) and were asked to indicate during a second passive movement towards the same target (Matching movement) when they felt that they matched the target position. The assessment was carried out on a planar surface for movements in the forward and oblique directions in the contralateral and ipsilateral sides of the tested arm. The matching performance was evaluated in terms of error magnitude (absolute and signed) and its variability. Stroke patients showed higher variability in the estimation of the target position compared to the healthy participants. Further, an effect of target was found, with lower absolute errors in the contralateral side. Pairwise comparison between individual stroke participant and control participants showed significant proprioceptive deficits in two patients. The proposed assessment of passive joint position sense was inherently simple and all participants, regardless of motor impairment level, could complete it in less than 10 minutes. Therefore, the method can potentially be carried out to detect changes in proprioceptive deficits in clinical settings.
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Affiliation(s)
- Sara Contu
- Robotics Research Centre, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
| | - Asif Hussain
- Robotics Research Centre, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
| | - Simone Kager
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
| | - Aamani Budhota
- Robotics Research Centre, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
- Interdisciplinary Graduate School, Nanyang Technological University, Singapore, Singapore
| | - Vishwanath A. Deshmukh
- Centre for Advanced Rehabilitation Therapeutics, Department of Rehabilitation Medicine, Tan Tock Seng Hospital, Singapore, Singapore
| | - Christopher W. K. Kuah
- Centre for Advanced Rehabilitation Therapeutics, Department of Rehabilitation Medicine, Tan Tock Seng Hospital, Singapore, Singapore
| | - Lester H. L. Yam
- Centre for Advanced Rehabilitation Therapeutics, Department of Rehabilitation Medicine, Tan Tock Seng Hospital, Singapore, Singapore
| | - Liming Xiang
- School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
| | - Karen S. G. Chua
- Centre for Advanced Rehabilitation Therapeutics, Department of Rehabilitation Medicine, Tan Tock Seng Hospital, Singapore, Singapore
| | - Lorenzo Masia
- Robotics Research Centre, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
| | - Domenico Campolo
- Robotics Research Centre, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
- * E-mail:
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Siqueira GSL, Amaral MVG, Schiefer M, Schlee G, Schultz-Wenk TF, de Almeida MN, Nicoliche EB, Cossich VRA, Motta G, Morrissey D, Salles JI. Proprioceptive deficit after total elbow arthroplasty: an observational study. J Shoulder Elbow Surg 2017; 26:2017-2022. [PMID: 28941975 DOI: 10.1016/j.jse.2017.07.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 07/10/2017] [Accepted: 07/14/2017] [Indexed: 02/01/2023]
Abstract
BACKGROUND During total elbow arthroplasty (TEA), most of the joint capsule is removed, including many mechanoreceptors important for proprioception, which potentially limits the patient's postoperative functional recovery. We quantified proprioceptive loss by measuring the threshold to detection of passive motion (TTDPM) in patients after unilateral TEA compared with the contralateral side. METHODS A continuous passive motion device moving the elbow at 0.5°/s was used to evaluate TTDPM in 8 patients (mean ± standard deviation age, 69.1 ± 9.93 years) at least 1 year after unilateral semiconstricted linked TEA for a range of diagnoses. Elbow function after TEA was assessed using the Mayo Elbow Performance Scale. RESULTS Postsurgical Mayo scores revealed 4 excellent results, 2 good, and 2 poor. The TTDPM in the elbows undergoing arthroplasty was still significantly higher compared with the contralateral elbow at 4.2° (15.6 ± 6.9 seconds vs. 7.2 ± 2.6 seconds; D = 3.23, P = .01) equivalent to 8.4 seconds. CONCLUSIONS Patients who have had severe joint disease requiring semiconstrained TEA have long-term proprioception deficits. A more conservative technique that maximally preserves insertions and soft tissues, might minimize upper limb proprioceptive deficit.
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Affiliation(s)
- Gláucio S L Siqueira
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, Brazil
| | - Marcus Vinicius G Amaral
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, Brazil
| | - Márcio Schiefer
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, Brazil
| | - Gunther Schlee
- Department of Human Locomotion, Chemnitz University of Technology, Chemnitz, Germany
| | - Thomas F Schultz-Wenk
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, Brazil
| | - Mauricio N de Almeida
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, Brazil
| | - Eduardo B Nicoliche
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, Brazil.
| | - Victor R A Cossich
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, Brazil
| | - Geraldo Motta
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, Brazil
| | - Dylan Morrissey
- Sports and Exercise Medicine, William Harvey Research Institute, Queen Mary University of London, Mile End Hospital, London, UK; Phyisotherapy Department, Barts Health National Health Service Trust, London, UK
| | - José Inácio Salles
- Research Division, National Institute of Traumatology and Orthopedic (INTO), Rio de Janeiro, Brazil; Sports and Exercise Medicine, William Harvey Research Institute, Queen Mary University of London, Mile End Hospital, London, UK
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Predicting Functional Recovery in Chronic Stroke Rehabilitation Using Event-Related Desynchronization-Synchronization during Robot-Assisted Movement. BIOMED RESEARCH INTERNATIONAL 2016; 2016:7051340. [PMID: 27057546 PMCID: PMC4739000 DOI: 10.1155/2016/7051340] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 11/20/2015] [Accepted: 11/23/2015] [Indexed: 11/18/2022]
Abstract
Although rehabilitation robotics seems to be a promising therapy in the rehabilitation of the upper limb in stroke patients, consensus is still lacking on its additive effects. Therefore, there is a need for determining the possible success of robotic interventions on selected patients, which in turn determine the necessity for new investigating instruments supporting the treatment decision-making process and customization. The objective of the work presented in this preliminary study was to verify that fully robot assistance would not affect the physiological oscillatory cortical activity related to a functional movement in healthy subjects. Further, the clinical results following the robotic treatment of a chronic stroke patient, who positively reacted to the robotic intervention, were analyzed and discussed. First results show that there is no difference in EEG activation pattern between assisted and no-assisted movement in healthy subjects. Even more importantly, the patient's pretreatment EEG activation pattern in no-assisted movement was completely altered, while it recovered to a quasi-physiological one in robot-assisted movement. The functional improvement following treatment was large. Using pretreatment EEG recording during robot-assisted movement might be a valid approach to assess the potential ability of the patient for recovering.
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Toledo DR, Manzano GM, Barela JA, Kohn AF. Cortical correlates of response time slowing in older adults: ERP and ERD/ERS analyses during passive ankle movement. Clin Neurophysiol 2016; 127:655-663. [DOI: 10.1016/j.clinph.2015.05.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 04/25/2015] [Accepted: 05/02/2015] [Indexed: 11/25/2022]
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Salles JI, Velasques B, Cossich V, Nicoliche E, Ribeiro P, Amaral MV, Motta G. Strength training and shoulder proprioception. J Athl Train 2015; 50:277-80. [PMID: 25594912 DOI: 10.4085/1062-6050-49.3.84] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
CONTEXT Proprioception is essential to motor control and joint stability during daily and sport activities. Recent studies demonstrated that athletes have better joint position sense (JPS) when compared with controls matched for age, suggesting that physical training could have an effect on proprioception. OBJECTIVE To evaluate the result of an 8-week strength-training program on shoulder JPS and to verify whether using training intensities that are the same or divergent for the shoulder's dynamic-stabilizer muscles promote different effects on JPS. DESIGN Randomized controlled clinical trial. SETTING We evaluated JPS in a research laboratory and conducted training in a gymnasium. PATIENTS OR OTHER PARTICIPANTS A total of 90 men, right handed and asymptomatic, with no history of any type of injury or shoulder instability. INTERVENTION(S) For 8 weeks, the participants performed the strength-training program 3 sessions per week. We used 4 exercises (bench press, lat pull down, shoulder press, and seated row), with 2 sets each. MAIN OUTCOME MEASURE(S) We measured shoulder JPS acuity by calculating the absolute error. RESULTS We found an interaction between group and time. To examine the interaction, we conducted two 1-way analyses of variance comparing groups at each time. The groups did not differ at pretraining; however, a difference among groups was noted posttraining. CONCLUSIONS Strength training using exercises at the same intensity produced an improvement in JPS compared with exercises of varying intensity, suggesting that the former resulted in improvements in the sensitivity of muscle spindles and, hence, better neuromuscular control in the shoulder.
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Affiliation(s)
- José Inácio Salles
- National Institute of Traumatology and Orthopedics (INTO), Rio de Janeiro, Brazil
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Han J, Waddington G, Adams R, Anson J. Bimanual proprioceptive performance differs for right- and left-handed individuals. Neurosci Lett 2013; 542:37-41. [PMID: 23523925 DOI: 10.1016/j.neulet.2013.03.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 02/12/2013] [Accepted: 03/02/2013] [Indexed: 12/13/2022]
Abstract
It has been proposed that asymmetry between the upper limbs in the utilization of proprioceptive feedback arises from functional differences in the roles of the preferred and non-preferred hands during bimanual tasks. The present study investigated unimanual and bimanual proprioceptive performance in right- and left-handed young adults with an active finger pinch movement discrimination task. With visual information removed, participants were required to make absolute judgments about the extent of pinch movements made to physical stops, either by one hand, or by both hands concurrently, with the sequence of presented movement extents varied randomly. Discrimination accuracy scores were derived from participants' responses using non-parametric signal detection analysis. Consistent with previous findings, a non-dominant hand/hemisphere superiority effect was observed, where the non-dominant hands of right- and left-handed individuals performed overall significantly better than their dominant hands. For all participants, bimanual movement discrimination scores were significantly lower than scores obtained in the unimanual task. However, the magnitude of the performance reduction, from the unimanual to the bimanual task, was significantly greater for left-handed individuals. The effect whereby bimanual proprioception was disproportionately affected in left-handed individuals could be due to enhanced neural communication between hemispheres in left-handed individuals leading to less distinctive separation of information obtained from the two hands in the cerebral cortex.
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Affiliation(s)
- Jia Han
- Shanghai University of Sport, 650 Qingyuanhuan Road, Shanghai 200438, Yangpu District, China.
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Needle AR, Charles B Buz S, Farquhar WB, Thomas SJ, Rose WC, Kaminski TW. Muscle spindle traffic in functionally unstable ankles during ligamentous stress. J Athl Train 2013; 48:192-202. [PMID: 23672383 PMCID: PMC3600921 DOI: 10.4085/1062-6050-48.1.09] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT Ankle sprains are common in athletes, with functional ankle instability (FAI) developing in approximately half of cases. The relationship between laxity and FAI has been inconclusive, suggesting that instability may be caused by insufficient sensorimotor function and dynamic restraint. Research has suggested that deafferentation of peripheral mechanoreceptors potentially causes FAI; however, direct evidence confirming peripheral sensory deficits has been elusive because previous investigators relied upon subjective proprioceptive tests. OBJECTIVE To develop a method for simultaneously recording peripheral sensory traffic, joint forces, and laxity and to quantify differences between healthy ankles and those with reported instability. DESIGN Case-control study. SETTING University laboratory. PATIENTS OR OTHER PARTICIPANTS A total of 29 participants (age = 20.9 ± 2.2 years, height = 173.1 ± 8.9 cm, mass = 74.5 ± 12.7 kg) stratified as having healthy (HA, n = 19) or unstable ankles (UA, n = 10). INTERVENTION(S) Sensory traffic from muscle spindle afferents in the peroneal nerve was recorded with microneurography while anterior (AP) and inversion (IE) stress was applied to ligamentous structures using an ankle arthrometer under test and sham conditions. MAIN OUTCOME MEASURE(S) Laxity (millimeters or degrees) and amplitude of sensory traffic (percentage) were determined at 0, 30, 60, 90, and 125 N of AP force and at 0, 1, 2, 3, and 4 Nm of IE torque. Two-factor repeated-measures analyses of variance were used to determine differences between groups and conditions. RESULTS No differences in laxity were observed between groups (P > .05). Afferent traffic increased with increased force and torque in test trials (P < .001). The UA group displayed decreased afferent activity at 30 N of AP force compared with the HA group (HA: 30.2% ± 9.9%, UA: 17.1% ± 16.1%, P < .05). CONCLUSIONS The amplitude of sensory traffic increased simultaneously with greater ankle motion and loading, providing evidence of the integrated role of capsuloligamentous and musculotendinous mechanoreceptors in maintaining joint sensation. Unstable ankles demonstrated diminished afferent traffic at low levels of force, suggesting the early detection of joint loading may be compromised.
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Affiliation(s)
- Alan R Needle
- University of Delaware, University of Delaware, Newark, DE 19716, USA.
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Salles JI, Cossich VRA, Amaral MV, Monteiro MT, Cagy M, Motta G, Velasques B, Piedade R, Ribeiro P. Electrophysiological correlates of the threshold to detection of passive motion: an investigation in professional volleyball athletes with and without atrophy of the infraspinatus muscle. BIOMED RESEARCH INTERNATIONAL 2013; 2013:634891. [PMID: 23484136 PMCID: PMC3581095 DOI: 10.1155/2013/634891] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 11/21/2012] [Accepted: 12/02/2012] [Indexed: 11/18/2022]
Abstract
The goal of the present study is to compare the electrophysiological correlates of the threshold to detection of passive motion (TTDPM) among three groups: healthy individuals (control group), professional volleyball athletes with atrophy of the infraspinatus muscle on the dominant side, and athletes with no shoulder pathologies. More specifically, the study aims at assessing the effects of infraspinatus muscle atrophy on the cortical representation of the TTDPM. A proprioception testing device (PTD) was used to measure the TTDPM. The device passively moved the shoulder and participants were instructed to respond as soon as movement was detected (TTDPM) by pressing a button switch. Response latency was established as the delay between the stimulus (movement) and the response (button press). Electroencephalographic (EEG) and electromyographic (EMG) activities were recorded simultaneously. An analysis of variance (ANOVA) and subsequent post hoc tests indicated a significant difference in latency between the group of athletes without the atrophy when compared both to the group of athletes with the atrophy and to the control group. Furthermore, distinct patterns of cortical activity were observed in the three experimental groups. The results suggest that systematically trained motor abilities, as well as the atrophy of the infraspinatus muscle, change the cortical representation of the different stages of proprioceptive information processing and, ultimately, the cortical representation of the TTDPM.
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Affiliation(s)
- José Inácio Salles
- Neuromuscular Research Laboratory, National Institute of Traumatology and Orthopaedics (INTO), Avenida Brasil 500, 20940-070 Rio de Janeiro, RJ, Brazil
- Brazilian Volleyball Confederation, Shopping Città America Avenida das Américas 700, Bloco 7, Barra da Tijuca, 22640-100 Rio de Janeiro, RJ, Brazil
| | - Victor Rodrigues Amaral Cossich
- Neuromuscular Research Laboratory, National Institute of Traumatology and Orthopaedics (INTO), Avenida Brasil 500, 20940-070 Rio de Janeiro, RJ, Brazil
| | - Marcus Vinicius Amaral
- Neuromuscular Research Laboratory, National Institute of Traumatology and Orthopaedics (INTO), Avenida Brasil 500, 20940-070 Rio de Janeiro, RJ, Brazil
| | - Martim T. Monteiro
- Neuromuscular Research Laboratory, National Institute of Traumatology and Orthopaedics (INTO), Avenida Brasil 500, 20940-070 Rio de Janeiro, RJ, Brazil
| | - Maurício Cagy
- Biomedical Engineering Program, Centre of Technology, Federal University of Rio de Janeiro, Avenida Horácio Macedo 2030, Bloco H, Sala 327, Cidade Universitária, 21941-901 Rio de Janeiro, RJ, Brazil
| | - Geraldo Motta
- Neuromuscular Research Laboratory, National Institute of Traumatology and Orthopaedics (INTO), Avenida Brasil 500, 20940-070 Rio de Janeiro, RJ, Brazil
| | - Bruna Velasques
- Neuromuscular Research Laboratory, National Institute of Traumatology and Orthopaedics (INTO), Avenida Brasil 500, 20940-070 Rio de Janeiro, RJ, Brazil
- Brain Mapping and Sensorimotor Integration Laboratory, Institute of Psychiatry, Federal University of Rio de Janeiro, Avenida Venceslau Brás 71, Botafogo, 22290-140 Rio de Janeiro, RJ, Brazil
- Institute of Applied Neuroscience (IAN), Rua Pacheco Leão 704, 25 Jardim Botânico, 22460-030 Rio de Janeiro, RJ, Brazil
| | - Roberto Piedade
- Brain Mapping and Sensorimotor Integration Laboratory, Institute of Psychiatry, Federal University of Rio de Janeiro, Avenida Venceslau Brás 71, Botafogo, 22290-140 Rio de Janeiro, RJ, Brazil
| | - Pedro Ribeiro
- Brain Mapping and Sensorimotor Integration Laboratory, Institute of Psychiatry, Federal University of Rio de Janeiro, Avenida Venceslau Brás 71, Botafogo, 22290-140 Rio de Janeiro, RJ, Brazil
- Institute of Applied Neuroscience (IAN), Rua Pacheco Leão 704, 25 Jardim Botânico, 22460-030 Rio de Janeiro, RJ, Brazil
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