Differences in Trapezius Muscle H-Reflex between Asymptomatic Subjects and Symptomatic Shoulder Pain Subjects
In chronic shoulder pain, adaptations in the nervous system such as in motoneuron excitability, could contribute to impairments in scapular muscles, perpetuation and recurrence of pain and reduced improvements during rehabilitation. The present cross-sectional study aims to compare trapezius neural...
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| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/9/4217 |
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| author | Ana S. C. Melo Janet L. Taylor Ricardo Ferreira Bruno Cunha Manuel Ascenção Mathieu Fernandes Vítor Sousa Eduardo B. Cruz J. Paulo Vilas-Boas Andreia S. P. Sousa |
| author_facet | Ana S. C. Melo Janet L. Taylor Ricardo Ferreira Bruno Cunha Manuel Ascenção Mathieu Fernandes Vítor Sousa Eduardo B. Cruz J. Paulo Vilas-Boas Andreia S. P. Sousa |
| author_sort | Ana S. C. Melo |
| collection | DOAJ |
| description | In chronic shoulder pain, adaptations in the nervous system such as in motoneuron excitability, could contribute to impairments in scapular muscles, perpetuation and recurrence of pain and reduced improvements during rehabilitation. The present cross-sectional study aims to compare trapezius neural excitability between symptomatic and asymptomatic subjects. In 12 participants with chronic shoulder pain (symptomatic group) and 12 without shoulder pain (asymptomatic group), the H reflex was evoked in all trapezius muscle parts, through C3/4 nerve stimulation, and the M-wave through accessory nerve stimulation. The current intensity to evoke the maximum H reflex, the latency and the maximum peak-to-peak amplitude of both the H reflex and M-wave, as well as the ratio between these two variables, were calculated. The percentage of responses was considered. Overall, M-waves were elicited in most participants, while the H reflex was elicited only in 58–75% or in 42–58% of the asymptomatic and symptomatic participants, respectively. A comparison between groups revealed that the symptomatic group presented a smaller maximum H reflex as a percentage of M-wave from upper trapezius and longer maximal H reflex latency from the lower trapezius (<i>p</i> < 0.05). Subjects with chronic shoulder pain present changes in trapezius H reflex parameters, highlighting the need to consider trapezius neuromuscular control in these individuals’ rehabilitation. |
| first_indexed | 2024-03-11T04:07:48Z |
| format | Article |
| id | doaj.art-450d2f755356438b8349a46378d11a12 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T04:07:48Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-450d2f755356438b8349a46378d11a122023-11-17T23:41:20ZengMDPI AGSensors1424-82202023-04-01239421710.3390/s23094217Differences in Trapezius Muscle H-Reflex between Asymptomatic Subjects and Symptomatic Shoulder Pain SubjectsAna S. C. Melo0Janet L. Taylor1Ricardo Ferreira2Bruno Cunha3Manuel Ascenção4Mathieu Fernandes5Vítor Sousa6Eduardo B. Cruz7J. Paulo Vilas-Boas8Andreia S. P. Sousa9Center for Rehabilitation Research, ESS (Escola Superior de Saúde), Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, PortugalCentre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, Perth, WA 6027, AustraliaCenter for Rehabilitation Research, ESS (Escola Superior de Saúde), Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, PortugalCenter for Rehabilitation Research, ESS (Escola Superior de Saúde), Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, PortugalCenter for Rehabilitation Research, ESS (Escola Superior de Saúde), Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, PortugalCenter for Rehabilitation Research, ESS (Escola Superior de Saúde), Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, PortugalCenter for Rehabilitation Research, ESS (Escola Superior de Saúde), Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, PortugalDepartment of Physiotherapy, Escola Superior de Saúde, Instituto Politécnico de Setúbal, Campus do IPS Estefanilha, 2914-503 Setúbal, PortugalPorto Biomechanics Laboratory (LABIOMEP-UP), University of Porto, Rua Dr. Plácido Costa, 91, 4200-450 Porto, PortugalCenter for Rehabilitation Research, ESS (Escola Superior de Saúde), Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, PortugalIn chronic shoulder pain, adaptations in the nervous system such as in motoneuron excitability, could contribute to impairments in scapular muscles, perpetuation and recurrence of pain and reduced improvements during rehabilitation. The present cross-sectional study aims to compare trapezius neural excitability between symptomatic and asymptomatic subjects. In 12 participants with chronic shoulder pain (symptomatic group) and 12 without shoulder pain (asymptomatic group), the H reflex was evoked in all trapezius muscle parts, through C3/4 nerve stimulation, and the M-wave through accessory nerve stimulation. The current intensity to evoke the maximum H reflex, the latency and the maximum peak-to-peak amplitude of both the H reflex and M-wave, as well as the ratio between these two variables, were calculated. The percentage of responses was considered. Overall, M-waves were elicited in most participants, while the H reflex was elicited only in 58–75% or in 42–58% of the asymptomatic and symptomatic participants, respectively. A comparison between groups revealed that the symptomatic group presented a smaller maximum H reflex as a percentage of M-wave from upper trapezius and longer maximal H reflex latency from the lower trapezius (<i>p</i> < 0.05). Subjects with chronic shoulder pain present changes in trapezius H reflex parameters, highlighting the need to consider trapezius neuromuscular control in these individuals’ rehabilitation.https://www.mdpi.com/1424-8220/23/9/4217shoulder painHoffmann reflexmotoneuron recruitmenttrapezius musclescapular stabilityfeedback mechanisms |
| spellingShingle | Ana S. C. Melo Janet L. Taylor Ricardo Ferreira Bruno Cunha Manuel Ascenção Mathieu Fernandes Vítor Sousa Eduardo B. Cruz J. Paulo Vilas-Boas Andreia S. P. Sousa Differences in Trapezius Muscle H-Reflex between Asymptomatic Subjects and Symptomatic Shoulder Pain Subjects Sensors shoulder pain Hoffmann reflex motoneuron recruitment trapezius muscle scapular stability feedback mechanisms |
| title | Differences in Trapezius Muscle H-Reflex between Asymptomatic Subjects and Symptomatic Shoulder Pain Subjects |
| title_full | Differences in Trapezius Muscle H-Reflex between Asymptomatic Subjects and Symptomatic Shoulder Pain Subjects |
| title_fullStr | Differences in Trapezius Muscle H-Reflex between Asymptomatic Subjects and Symptomatic Shoulder Pain Subjects |
| title_full_unstemmed | Differences in Trapezius Muscle H-Reflex between Asymptomatic Subjects and Symptomatic Shoulder Pain Subjects |
| title_short | Differences in Trapezius Muscle H-Reflex between Asymptomatic Subjects and Symptomatic Shoulder Pain Subjects |
| title_sort | differences in trapezius muscle h reflex between asymptomatic subjects and symptomatic shoulder pain subjects |
| topic | shoulder pain Hoffmann reflex motoneuron recruitment trapezius muscle scapular stability feedback mechanisms |
| url | https://www.mdpi.com/1424-8220/23/9/4217 |
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