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Celicanin M, Harrison AP, Kvistgaard Olsen J, Korbo L, Løkkegård A, Danneskiold‐Samsøe B, Siebner HR, Ilic TV, Bartels E. Probing motor dynamics at the muscle level-Acoustic myography in Parkinson's disease. Physiol Rep 2023; 11:e15631. [PMID: 36945885 PMCID: PMC10031214 DOI: 10.14814/phy2.15631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/09/2023] [Accepted: 02/13/2023] [Indexed: 03/23/2023] Open
Abstract
Acoustic myography (AMG) noninvasively probes muscle activity. We explored whether AMG captures abnormal motor activity in patients with Parkinson's disease (PD) and how this activity is modulated by antiparkinsonian medication. Twenty patients with PD underwent AMG of the biceps, triceps, extensor carpi radialis longus, and adductor policis muscles of the more affected arm during active and passive movements, using a mobile AMG device (CURO, Denmark). AMG and assessment of motor symptoms were performed in a pragmatic off-medication state, as well as one and 3 h after oral intake of 200 mg levodopa. Three AMG parameters were calculated using the CURO analysis system. Motor efficiency was expressed by the E-score, muscle fiber recruitment by the temporal T-score, spatial summation by the S-score, and S/T ratio. Twenty age- and sex-matched healthy subjects served as controls. Group mean values were statistically compared using unpaired two-tailed adjusted t-test and ANOVA with Tukey´s correction for multiple comparison (p ≤ 0.05). For the biceps and extensor carpi radialis longus muscles, the active movement S:T ratio was lower in PD relative to healthy controls. The E-score was also lower during active and passive flexion/extension movements in the off-medication state. No significant between-group differences in the AMG scores were noted for the triceps muscle during active or passive movements. The active S:T ratio and the E-score during active elbow flexion and extension may offer a useful means to quickly assess abnormal motor activity and the effect of drug treatment in PD.
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Affiliation(s)
- M. Celicanin
- Department of NeurologyCopenhagen University Hospital, Bispebjerg and FrederiksbergCopenhagenDenmark
- The Parker InstituteCopenhagen University Hospital, Bispebjerg and FrederiksbergFrederiksbergDenmark
| | - A. P. Harrison
- University of Copenhagen, PAS (Physiology)Faculty of Health and Medical SciencesKobenhavnDenmark
| | - J. Kvistgaard Olsen
- The Parker InstituteCopenhagen University Hospital, Bispebjerg and FrederiksbergFrederiksbergDenmark
| | - L. Korbo
- Department of NeurologyCopenhagen University Hospital, Bispebjerg and FrederiksbergCopenhagenDenmark
| | - A. Løkkegård
- Department of NeurologyCopenhagen University Hospital, Bispebjerg and FrederiksbergCopenhagenDenmark
| | - B. Danneskiold‐Samsøe
- The Parker InstituteCopenhagen University Hospital, Bispebjerg and FrederiksbergFrederiksbergDenmark
| | - H. R. Siebner
- Department of NeurologyCopenhagen University Hospital, Bispebjerg and FrederiksbergCopenhagenDenmark
- University of Copenhagen, PAS (Physiology)Faculty of Health and Medical SciencesKobenhavnDenmark
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and ResearchCopenhagen University Hospital Amager and HvidovreHvidovreDenmark
| | - T. V. Ilic
- Department of Neurophysiology, Medical Faculty of Military Medical AcademyUniversity of DefenseBelgradeSerbia
| | - E. M. Bartels
- Department of NeurologyCopenhagen University Hospital, Bispebjerg and FrederiksbergCopenhagenDenmark
- The Parker InstituteCopenhagen University Hospital, Bispebjerg and FrederiksbergFrederiksbergDenmark
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2
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Dong Y, Li Q. Phonomyography on Perioperative Neuromuscular Monitoring: An Overview. SENSORS 2022; 22:s22072448. [PMID: 35408063 PMCID: PMC9003319 DOI: 10.3390/s22072448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/15/2022] [Accepted: 03/20/2022] [Indexed: 02/05/2023]
Abstract
Complications related to neuromuscular blockade (NMB) could occur during anesthesia induction, maintenance, and emergency. It is recommended that neuromuscular monitoring techniques be utilized perioperatively to avoid adverse outcomes. However, current neuromuscular monitoring methods possess different shortcomings. They are cumbersome to use, susceptible to disturbances, and have limited alternative monitoring sites. Phonomyography (PMG) monitoring based on the acoustic signals yielded by skeletal muscle contraction is emerging as an interesting and innovative method. This technique is characterized by its convenience, stable signal quality, and multimuscle recording ability and shows great potential in the application field. This review summarizes the progression of PMG on perioperative neuromuscular monitoring chronologically and presents the merits, demerits, and challenges of PMG-based equipment, aiming at underscoring the potential of PMG-based apparatuses for neuromuscular monitoring.
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Affiliation(s)
| | - Qian Li
- Correspondence: ; Tel.: +86-18980601635
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3
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Kett AR, Milani TL, Sichting F. Sitting for Too Long, Moving Too Little: Regular Muscle Contractions Can Reduce Muscle Stiffness During Prolonged Periods of Chair-Sitting. Front Sports Act Living 2021; 3:760533. [PMID: 34805980 PMCID: PMC8595117 DOI: 10.3389/fspor.2021.760533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 10/11/2021] [Indexed: 12/19/2022] Open
Abstract
In modern Western societies, sedentary behavior has become a growing health concern. There is increasing evidence that prolonged sitting periods can be associated with musculoskeletal disorders. While it is generally recognized that back muscle activity is low during chair-sitting, little is known about the consequences of minor to no muscle activity on muscle stiffness. Muscle stiffness may play an important role in musculoskeletal health. This study investigated the effects of regular muscle contractions on muscle stiffness in a controlled experiment in which participants sat for 4.5 h. Neuromuscular electrical stimulation in the lumbar region of the back was applied to trigger regular muscle contractions. Using stiffness measurements and continuous motion capturing, we found that prolonged sitting periods without regular muscle contractions significantly increased back muscle stiffness. Moreover, we were able to show that regular muscle contractions can prevent those effects. Our results highlight the importance of consistent muscle activity throughout the day and may help explain why prolonged periods of chair-sitting increase the susceptibility to common pathological conditions such as low back pain.
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Affiliation(s)
- Alexander R Kett
- Department of Human Locomotion, Institute of Human Movement Science and Health, Chemnitz University of Technology, Chemnitz, Germany.,Research & Development, Mercedes-Benz AG, Böblingen, Germany
| | - Thomas L Milani
- Department of Human Locomotion, Institute of Human Movement Science and Health, Chemnitz University of Technology, Chemnitz, Germany
| | - Freddy Sichting
- Department of Human Locomotion, Institute of Human Movement Science and Health, Chemnitz University of Technology, Chemnitz, Germany
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4
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Varcoe G, Manfredi J, Jackson A, Tomlinson J. Effect of tibial plateau levelling osteotomy and rehabilitation on muscle function in cruciate-deficient dogs evaluated with acoustic myography. COMPARATIVE EXERCISE PHYSIOLOGY 2021. [DOI: 10.3920/cep200085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The objective of the study was to determine the function of the biceps femoris, quadriceps, gastrocnemius and semitendinosus muscles at the walk in dogs with unilateral clinical cruciate disease and palpable joint instability. To compare function before and after a tibial plateau levelling osteotomy (TPLO) procedure, and after six weeks of subsequent rehabilitation therapy. Fourteen adult client-owned dogs with cranial cruciate ligament deficiency (CCLD). Orthopaedic examination, temporospatial gait analysis and acoustic myography (AMG) recordings were made at three time points: before TPLO, and post-operatively at two and eight weeks. A rehabilitation program started 2 weeks after surgery and was either in-clinic along with in-home rehabilitation or in-home only. Statistics included: repeated measures ANOVA and paired t-tests. Significance was set at P<0.05. When comparing the affected versus the unaffected limb in the CCLD dogs, there were no significant differences found in AMG values between baseline and other time points for the quadriceps and semitendinosus muscles. The gastrocnemius and biceps femoris muscles had a significant change in spatial summation (S) score over time. The gastrocnemius (S) score was not significantly different to the unaffected limb by 8 weeks post TPLO. There was no significant effect of rehabilitation method on S score. Dogs with in-clinic rehabilitation regained more symmetry in thigh circumference versus in-home only. Lameness parameters improved but did not completely resolve in all dogs by week 8 post TPLO. The function of the gastrocnemius muscles in affected limbs was significantly different to normal limbs at baseline and 2 weeks post TPLO but not at 8 weeks. Thigh symmetry, but no other parameters, was improved with the addition of in-clinic rehabilitation.
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Affiliation(s)
- G.M. Varcoe
- Twin Cities Animal Rehabilitation and Sports Medicine, 12010 Riverwood Ave, Burnsville, MN 55337, USA
| | - J.M. Manfredi
- Pathobiology and Diagnostic Investigation, Michigan State University, College of Veterinary Medicine, East Lansing, Michigan, MI 48824, USA
| | - A. Jackson
- BluePearl Veterinary Partners, 7717 Flying Cloud Dr, Eden Prairie, MN 55344, USA
| | - J.E. Tomlinson
- Twin Cities Animal Rehabilitation and Sports Medicine, 12010 Riverwood Ave, Burnsville, MN 55337, USA
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5
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Fuglsang-Damgaard L, Harrison A, Vitger A. Altered muscle activation in agility dogs performing warm-up exercises: an acoustic myography study. COMPARATIVE EXERCISE PHYSIOLOGY 2021. [DOI: 10.3920/cep190076] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Agility is physically demanding and dogs encounter a considerable risk of injury during training and competition. Pre-performance warm-up is used routinely among human athletes to prepare the tissues for these physical demands, but in canine sports evidence for effects of warm-up is lacking. The aim of this study was to investigate the effects of warm-up in dogs on two major muscles involved in locomotion. It was hypothesised that, after warm-up, the muscles would be used more efficiently (more fibre resting time/total time), recruit fewer fibres (reduced spatial summation) and/or activated with a lower firing frequency (reduced temporal summation). The following factors ‘sex, age, weight, height, training level and agility experience’ were evaluated for their potential impact on muscle function parameters. Fourteen large (≥46 cm at the withers) agility dogs of different breeds and training levels performed a 5 min warm-up program three times, with a 2 min break between the programs for recording purposes. Acoustic myography sensors were attached on the skin over the muscles m. triceps brachii (TB) and m. gluteus superficialis (GS). Recordings of muscle activity were made, while the dogs trotted before warm-up and after each 5 min warm-up program. The dogs used TB more efficiently after 5 min (P<0.05), 10 min (P<0.05) and 15 min (P<0.001) of exercise compared to pre-warm-up values. No changes were found in the activity of GS. For well-trained dogs, TB recruited fewer muscle fibres after 10 and 15 min of warm-up compared to dogs that trained less than 1 h weekly (P<0.03). For dogs with more than 2 years of experience, GS had a lower firing frequency before and after 10 min warm-up compared to dogs with less experience. The results indicate that warm-up alters muscle activation by an increased muscular efficiency. Training level and experience have an influence on muscle function parameters.
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Affiliation(s)
| | - A.P. Harrison
- University of Copenhagen, PAS (Physiology), Faculty of Health and Medical Sciences, Dyrlægevej 100, 1870 Frederiksberg C, Denmark
| | - A.D. Vitger
- DVM, University of Copenhagen, Faculty of Health and Medical Sciences, Veterinary Clinical Sciences, Dyrlægevej 16, 1870 Frederiksberg C, Denmark
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6
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Shcherbynina MB, Gladun VM, Sarana V. Acoustic Myography as a Noninvasive Technique for Assessing Muscle Function: Historical Aspects and Possibilities for Application in Clinical Practice. NEUROPHYSIOLOGY+ 2021. [DOI: 10.1007/s11062-021-09885-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Tanim AK, Nahiyan KMT, Ahad M. Suitability of Single-channel Acoustic Myography for Classification of Individual Finger Movements. 2020 JOINT 9TH INTERNATIONAL CONFERENCE ON INFORMATICS, ELECTRONICS & VISION (ICIEV) AND 2020 4TH INTERNATIONAL CONFERENCE ON IMAGING, VISION & PATTERN RECOGNITION (ICIVPR) 2020. [DOI: 10.1109/icievicivpr48672.2020.9306593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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8
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Muscle function assessed by the non-invasive method acoustic myography (AMG) in a Danish group of healthy adults. Curr Res Physiol 2020; 2:22-29. [PMID: 34746813 PMCID: PMC8562189 DOI: 10.1016/j.crphys.2020.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/16/2020] [Accepted: 02/03/2020] [Indexed: 11/24/2022] Open
Abstract
Acoustic myography (AMG) is a non-invasive method to assess muscle function during daily activities. AMG has great scope for assessment of musculoskeletal problems. The aim of this study was to create an AMG data set for general clinical use and relate these findings to age and gender. 10 healthy subjects (5 men/5 women), in each decade from 20 to 69 years of age (n = 50), were assessed. Their clinical health was tested. AMG measurements were carried out on muscles involved in defined movements of the upper and lower extremities. Muscle performance was measured using efficiency (E-score) and fibre recruitment (temporal (T-score) and spatial (S-score) summation). AMG-measurements showed good reproducibility. In each age group, it was found that for all those daily living skills measured, there was no gender difference. A walking and stair climbing test revealed that both legs are used equally and in a balanced way in healthy subjects. Moreover, there was no change in this function with increasing age up to 69 years. However, a cycling test with loading revealed that in elderly subjects the coordination of muscle use is impaired compared to that of the younger adults. Finally, a flexion test of the arm revealed an age-related decrease in the efficiency/coordination of m.Biceps alone, and a keyboard writing test suggests no effect on m.Trapezius. This reference data set now illustrates the reproducibility and ease of use of acoustic myography in the clinic and provides a means of assessing individuals with musculoskeletal problems. Acoustic myography is a non-invasive, real-time and repeatable tool for assessing musculoskeletal problems in the clinic. A walking and stair climbing test revealed both legs to be used in a balanced way in healthy subjects, with no age effect. A cycling test with loading showed that coordination of muscle use was impaired with increasing age. A flexion test of the arm revealed an age-related decrease in the efficiency/coordination of m.Biceps alone. This reference data set illustrates the ease of use of this technique in the clinic for musculoskeletal problems.
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9
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Bartels EM, Andersen EL, Olsen JK, Kristensen LE, Bliddal H, Danneskiold‐Samsøe B, Harrison AP. Muscle assessment using multi-frequency bioimpedance in a healthy Danish population aged 20-69 years: a powerful non-invasive tool in sports and in the clinic. Physiol Rep 2019; 7:e14109. [PMID: 31197976 PMCID: PMC6565800 DOI: 10.14814/phy2.14109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 04/29/2019] [Accepted: 05/08/2019] [Indexed: 12/17/2022] Open
Abstract
The condition of active muscles determines an individual's ability to carry out daily activities and has implications for an athlete's performance. Multi-frequency bioimpedance (mfBIA) is a non-invasive, well-known, validated, and much used method to assess muscle condition. However, it is rarely used to its full potential. Our aim was to apply mfBIA fully in the assessment of an adult healthy population, to compare muscle condition in different functional rested muscle groups, with age, and between men and women, and establish a control data set. Fifty healthy subjects (25 men/25 women) aged 20-69 years, participated. mfBIA measurements at a frequency range of 4-1000 kHz were taken from muscles of the lower and the upper extremities, the upper back, and the hand. Data were analyzed using ImpediMed software, giving Impedance, Resistance, Reactance, Phase Angle, Center Frequency, external and internal Resistance, and Membrane Capacitance. Differences between means were tested for statistical significance. A P value >0.05 was considered nonsignificant. While no difference in the mfBIA parameters was seen with age, a highly significant gender difference was seen. At rest, women's muscles cf men's showed a significantly higher center frequency and intra- and extra-cellular resistance, while the membrane capacitance was lower. A set of values for mfBIA parameters for healthy adult individuals are given for some of the main muscles which are frequently part of muscle assessment. The documented gender difference in muscle condition at rest has important implications in work situations, during physical rehabilitation and when training for competitive sports.
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Affiliation(s)
- Else Marie Bartels
- The Parker InstituteCopenhagen University HospitalBispebjerg & FrederiksbergFrederiksbergDenmark
- Department of NeurologyCopenhagen University HospitalBispebjerg & FrederiksbergCopenhagenDenmark
- Copenhagen Center for Translational ResearchCopenhagen University Hospital, Bispebjerg & FrederiksbergCopenhagenDenmark
| | - Eva Littrup Andersen
- The Parker InstituteCopenhagen University HospitalBispebjerg & FrederiksbergFrederiksbergDenmark
| | - Jack Kvistgaard Olsen
- The Parker InstituteCopenhagen University HospitalBispebjerg & FrederiksbergFrederiksbergDenmark
| | - Lars Erik Kristensen
- The Parker InstituteCopenhagen University HospitalBispebjerg & FrederiksbergFrederiksbergDenmark
- Department of Clinical MedicineFaculty of Health & Medical SciencesCopenhagen UniversityCopenhagenDenmark
| | - Henning Bliddal
- The Parker InstituteCopenhagen University HospitalBispebjerg & FrederiksbergFrederiksbergDenmark
- Department of Clinical MedicineFaculty of Health & Medical SciencesCopenhagen UniversityCopenhagenDenmark
| | - Bente Danneskiold‐Samsøe
- The Parker InstituteCopenhagen University HospitalBispebjerg & FrederiksbergFrederiksbergDenmark
- Department of Clinical MedicineFaculty of Health & Medical SciencesCopenhagen UniversityCopenhagenDenmark
| | - Adrian Paul Harrison
- Pathobiological Sciences (Physiology)Faculty of Health & Medical SciencesCopenhagen UniversityFrederiksbergDenmark
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10
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Bordoni B, Marelli F, Morabito B, Sacconi B. Emission of Biophotons and Adjustable Sounds by the Fascial System: Review and Reflections for Manual Therapy. J Evid Based Integr Med 2019; 23:2515690X17750750. [PMID: 29405763 PMCID: PMC5871034 DOI: 10.1177/2515690x17750750] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Every body structure is wrapped in connective tissue or fascia, creating a structural continuity that gives form and function to every tissue and organ. The fascial tissue is uniformly distributed throughout the body, enveloping, interacting with and permeating blood vessels, nerves, viscera, meninges, bones and muscles, creating various layers at different depths and forming a tridimensional metabolic and mechanical matrix. This article reviews the literature on the emission of biophotons and adjustable sounds by the fascial system, because these biological changes could be a means of local and systemic cellular communication and become another assessment tool for manual (therapy) practitioners. This is the first article that discusses these topics in a single text, attempting to bring such information into an area of application that is beneficial to osteopaths, chiropractors, and manual therapists.
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Affiliation(s)
| | - Fabiola Marelli
- 2 CRESO, School of Osteopathic Centre for Research and Studies, Gorla Minore (VA), Italy.,3 CRESO, School of Osteopathic Centre for Research and Studies, Fano (Pesaro Urbino), Italy
| | - Bruno Morabito
- 2 CRESO, School of Osteopathic Centre for Research and Studies, Gorla Minore (VA), Italy.,3 CRESO, School of Osteopathic Centre for Research and Studies, Fano (Pesaro Urbino), Italy.,4 Foundation Polyclinic University A. Gemelli University Cattolica del Sacro Cuore, Rome, Italy
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11
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Acutt EV, le Jeune SS, Pypendop BH. Evaluation of the Effects of Chiropractic on Static and Dynamic Muscle Variables in Sport Horses. J Equine Vet Sci 2019. [DOI: 10.1016/j.jevs.2018.10.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Claudel CG, Ahmed W, Elbrønd VS, Harrison AP, Bartels EM. The relation between maximal voluntary force in m. palmaris longus and the temporal and spatial summation of muscle fiber recruitment in human subjects. Physiol Rep 2018; 6. [PMID: 29333727 PMCID: PMC5789660 DOI: 10.14814/phy2.13580] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 12/20/2017] [Indexed: 11/24/2022] Open
Abstract
This study aimed at looking at the frequency (T‐score) and the amplitude (S‐score) of fiber use during contraction of a forearm muscle, m. palmaris longus, as measured by acoustic myography (AMG). An additional aim was to relate the T‐ and S‐scores to the recorded force obtained from a hand dynamometer. The hypothesis being that temporal and spatial summation of muscle fiber contraction in a given muscle during a given movement, can together describe a given obtained force. Force measurements were carried out on 12 healthy human subjects aged 19–68 years (6 men & 6 women), while their m. palmaris longus contractile function was measured using an acoustic myography CURO device. Force production was varied from 90 to 10% of assessed maximal voluntary force (MVF), and also monitored over a 1 min period of 50% MVF. Linear regression analysis was applied to relate force to spatial and temporal summation. Muscle strength was sustained by changing the frequency and/or the number of active fibere at any given point in time. Force production, whilst stronger for men than women, was regulated in a similar fashion for both sexes and was closely correlated with the AMG T‐ and S‐scores. It is concluded that AMG is a noninvasive method which can be readily applied to accurately describe how a subject uses a given muscle during any given movement. These findings have relevance when considering training strategies in subjects with muscle trauma or disease, in the elderly, or for both amateur and top professional athletes.
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Affiliation(s)
- Cécyl G Claudel
- IVH, Faculty of Health & Medical Sciences, Copenhagen University, Copenhagen, Denmark
| | - Waqas Ahmed
- IVH, Faculty of Health & Medical Sciences, Copenhagen University, Copenhagen, Denmark
| | - Vibeke S Elbrønd
- IVH, Faculty of Health & Medical Sciences, Copenhagen University, Copenhagen, Denmark
| | - Adrian P Harrison
- IVH, Faculty of Health & Medical Sciences, Copenhagen University, Copenhagen, Denmark
| | - Else Marie Bartels
- The Parker Institute, Copenhagen University Hospital, Bispebjerg & Frederiksberg, Copenhagen, Denmark
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13
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Chavers JC, Allen AK, Ahmed W, Fuglsang-Damgaard LH, Harrison AP. The Equine Hindlimb Proximal Suspensory Ligament: an Assessment of Health and Function by Means of Its Damping Harmonic Oscillator Properties, Measured Using an Acoustic Myography System: a New Modality Study. J Equine Vet Sci 2018. [DOI: 10.1016/j.jevs.2018.09.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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The Efficacy of Intermittent Long-term Bell Boot Application for the Correction of Muscle Asymmetry in Equine Subjects. J Equine Vet Sci 2018; 68:73-80. [PMID: 31256893 DOI: 10.1016/j.jevs.2018.05.214] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 05/02/2018] [Accepted: 05/21/2018] [Indexed: 11/22/2022]
Abstract
It has been proposed that manipulating proprioceptive signals of the equine distal limb as part of a rehabilitation process in cases of musculoskeletal pain or neurologic deficits can be used to correct postural control and restore normal motor programs. This trial has examined the effect of treatment with a light-weight and loose-fitting bell boot (82 g) on an imbalance of muscle gluteus superficialis function in horses as measured using acoustic myography (AMG). Eight horses were trained over a 60-minute period every 3 days for 6 weeks, a protocol based on preliminary findings. Acoustic myography measurements, recording the coordination, spatial and temporal summation of muscle contractions, were made at the start (baseline) and at the finish (week 6) after a warmup period and following a set procedure of physical activity. Walking, trotting, and cantering during a left-hand circle at the start of the trial revealed a slight but significant asymmetry between the left and right hind limb muscle, which improved successfully after 6 weeks of proprioception training. Data for the right-hand circle, which revealed no significant asymmetry, during walk, trot, and canter at the start, showed no change after 6 weeks of training at the walk and trot but developed an imbalance during cantering, the result of overcompensation. This study demonstrates that functional musculoskeletal asymmetry measured during periods of activity can not only be accurately detected using AMG but it also reveals an association between the program of proprioceptive training adopted and an improvement in muscular imbalance.
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15
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Plewa K, Samadani A, Orlandi S, Chau T. A novel approach to automatically quantify the level of coincident activity between EMG and MMG signals. J Electromyogr Kinesiol 2018; 41:34-40. [PMID: 29738937 DOI: 10.1016/j.jelekin.2018.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 02/26/2018] [Accepted: 04/03/2018] [Indexed: 11/25/2022] Open
Abstract
Although previous studies have highlighted both similarities and differences between the timing of electromyography (EMG) and mechanomyography (MMG) activities of muscles, there is no method to systematically quantify the temporal alignment between corresponding EMG and MMG signals. We proposed a novel method to determine the level of coincident activity in quasi-periodic MMG and EMG signals. The method optimizes 3 muscle-specific parameters: amplitude threshold, window size and minimum percent of EMG and MMG overlap using a particle swarm optimization algorithm to maximize the agreement (balanced accuracy) between electrical and mechanical muscle activity. The method was applied to bilaterally recorded EMG and MMG signals from 4 lower limb muscles per side of 25 pediatric participants during self-paced gait. Mean balanced accuracy exceeded 75% for all muscles except the lateral gastrocnemius, where EMG and MMG misalignment was notable (56% balanced accuracy). The proposed method can be applied to the criterion-driven comparison of simultaneously recorded myographic signals from two different measurement modalities during a motor task.
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Affiliation(s)
- Katherine Plewa
- Holland Bloorview Kids Rehabilitation Hospital, Canada; Institute of Biomaterials & Biomedical Engineering, University of Toronto, Canada
| | - Ali Samadani
- Holland Bloorview Kids Rehabilitation Hospital, Canada; Institute of Biomaterials & Biomedical Engineering, University of Toronto, Canada
| | - Silvia Orlandi
- Holland Bloorview Kids Rehabilitation Hospital, Canada; Institute of Biomaterials & Biomedical Engineering, University of Toronto, Canada
| | - Tom Chau
- Holland Bloorview Kids Rehabilitation Hospital, Canada; Institute of Biomaterials & Biomedical Engineering, University of Toronto, Canada.
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16
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Blondin DP, Haman F. Shivering and nonshivering thermogenesis in skeletal muscles. HANDBOOK OF CLINICAL NEUROLOGY 2018; 156:153-173. [PMID: 30454588 DOI: 10.1016/b978-0-444-63912-7.00010-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Humans have inherited complex neural circuits which drive behavioral, somatic, and autonomic thermoregulatory responses to defend their body temperature. While they are well adapted to dissipate heat in warm climates, they have a reduced capacity to preserve it in cold environments. Consequently, heat production is critical to defending their core temperature. As in other large mammals, skeletal muscles are the primary source of heat production recruited in cold-exposed humans. This is achieved voluntarily in the form of contractions from exercising muscles or involuntarily in the form of contractions from shivering muscles and the recruitment of nonshivering mechanisms. This review describes our current understanding of shivering and nonshivering thermogenesis in skeletal muscles, from the neural circuitry driving their recruitment to the metabolic substrates that fuel them. The presence of these heat-producing mechanisms can be measured in vivo by combining indirect respiratory calorimetry with electromyography or biomedical imaging modalities. Indeed, much of what is known regarding shivering in humans and other animal models stems from studies performed using these methods combined with in situ and in vivo neurologic techniques. More recent investigations have focused on understanding the metabolic processes that produce the heat from both contracting and noncontracting mechanisms. With the growing interest in the potential therapeutic benefits of shivering and nonshivering skeletal muscle to counter the effects of neuromuscular, cardiovascular, and metabolic diseases, we expect this field to continue its growth in the coming years.
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Affiliation(s)
- Denis P Blondin
- Department of Medicine, Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, Canada.
| | - François Haman
- Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
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Harrison AP. A more precise, repeatable and diagnostic alternative to surface electromyography - an appraisal of the clinical utility of acoustic myography. Clin Physiol Funct Imaging 2017; 38:312-325. [PMID: 28251802 DOI: 10.1111/cpf.12417] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 01/11/2017] [Indexed: 11/27/2022]
Abstract
Acoustic myography (AMG) enables a detailed and accurate measurement of those muscles involved in a particular movement and is independent of electrical signals between the nerve and muscle, measuring solely muscle contractions, unlike surface electromyography (sEMG). With modern amplifiers and digital sound recording systems, measurements during physical activity both inside and outside a laboratory setting are now possible and accurate. Muscle sound gives a representation of the work of each muscle group during a complex movement, and under certain forms of movement even reveals both concentric and eccentric activity, something that sEMG is incapable of. Recent findings suggest that AMG has a number of advantages over sEMG, being simple to use, accurate and repeatable as well as being intuitive to interpret. The AMG signal comprises three physiological parameters, namely efficiency/coordination (E-score), spatial summation (S-score) and temporal summation (T-score). It is concluded that modern AMG units have the potential to accurately assess patients with neuromuscular and musculoskeletal complaints in hospital clinics, home monitoring situations as well as sports settings.
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Affiliation(s)
- Adrian P Harrison
- Department of Veterinary Clinical & Animal Sciences, Faculty of Health & Medical Sciences, Copenhagen University, Frederiksberg C, Denmark
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