Modulation of ankle antagonist co-activation during the transition from upright standing to gait and to sit in post-stroke subjects
AbstractIntroduction Antagonist co-activation represents a neuronal command for the modulation of muscle synergies with postural control purposes [1], probably assuming a key role in the characterisation of tonus dysfunction in post-stroke subjects. This study aims to evaluate the ankle antagonist c...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2021-04-01
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| Series: | Annals of Medicine |
| Online Access: | https://www.tandfonline.com/doi/10.1080/07853890.2021.1896620 |
| _version_ | 1797658063979675648 |
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| author | Edgar Ribeiro Augusta Silva Liliana Pinho Rubim Santos Francisco Pinho Andreia S. P. Sousa |
| author_facet | Edgar Ribeiro Augusta Silva Liliana Pinho Rubim Santos Francisco Pinho Andreia S. P. Sousa |
| author_sort | Edgar Ribeiro |
| collection | DOAJ |
| description | AbstractIntroduction Antagonist co-activation represents a neuronal command for the modulation of muscle synergies with postural control purposes [1], probably assuming a key role in the characterisation of tonus dysfunction in post-stroke subjects. This study aims to evaluate the ankle antagonist co-activation during different functional tasks in post-stroke subjects.Materials and methods A cross-sectional study was performed in eight participants (age = 43.00 ± 10.63 years; median ± interquartile range) who had a subcortical ischaemic stroke in the middle cerebral artery territory for at least 6 months. The study was approved by the local ethics committee and implemented in a research centre. Antagonist co-activation between tibialis anterior (TA) and soleus (SOL) and between TA and gastrocnemius medialis (GM) of the ipsilesional (IPSI) and contralesional (CONTRA) limbs was calculated through electromyographic signals collected during upright standing and postural phases of gait initiation and stand-to-sit, according to the methods proposed by Ribeiro [2].Results The CONTRA limb presented decreased values in TA/SOL pair during upright standing and increased values in both muscle pairs during gait initiation compared to the IPSI limb (Table 1). No significant differences were found between tasks (Table 1).Table 1. Median (Md) and interquartile range (IQR) of antagonist co-activation during functional tasks and p-values obtained from inter-limb and inter-task comparisons.[Table: see text]Discussion and conclusions The IPSI and CONTRA limbs presented increased antagonist co-activation when an adequate antigravity function and the coordination of the tibia forward rotation are required, respectively. The comparison of these values with that obtained by healthy subjects [3,4] seems to point to a bilateral postural control dysfunction in post-stroke subjects related to tonus modulation deficits that should be addressed in neurorehabilitation. Future studies with a higher sample are required to extend the results. |
| first_indexed | 2024-03-11T17:53:47Z |
| format | Article |
| id | doaj.art-1186416fc63b4e59b45875f9e2d83a12 |
| institution | Directory Open Access Journal |
| issn | 0785-3890 1365-2060 |
| language | English |
| last_indexed | 2024-03-11T17:53:47Z |
| publishDate | 2021-04-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Annals of Medicine |
| spelling | doaj.art-1186416fc63b4e59b45875f9e2d83a122023-10-17T21:44:46ZengTaylor & Francis GroupAnnals of Medicine0785-38901365-20602021-04-0153sup1S189S19010.1080/07853890.2021.1896620Modulation of ankle antagonist co-activation during the transition from upright standing to gait and to sit in post-stroke subjectsEdgar Ribeiro0Augusta Silva1Liliana Pinho2Rubim Santos3Francisco Pinho4Andreia S. P. Sousa5Center for Rehabilitation Research, School of Health, Polytechnic of Porto, Porto, PortugalCenter for Rehabilitation Research, School of Health, Polytechnic of Porto, Porto, PortugalCenter for Rehabilitation Research, School of Health, Polytechnic of Porto, Porto, PortugalCenter for Rehabilitation Research, School of Health, Polytechnic of Porto, Porto, PortugalCESPU, Institute of Research and Advanced Training in Health Sciences and Technologies, V. N. Famalicão, PortugalCenter for Rehabilitation Research, School of Health, Polytechnic of Porto, Porto, PortugalAbstractIntroduction Antagonist co-activation represents a neuronal command for the modulation of muscle synergies with postural control purposes [1], probably assuming a key role in the characterisation of tonus dysfunction in post-stroke subjects. This study aims to evaluate the ankle antagonist co-activation during different functional tasks in post-stroke subjects.Materials and methods A cross-sectional study was performed in eight participants (age = 43.00 ± 10.63 years; median ± interquartile range) who had a subcortical ischaemic stroke in the middle cerebral artery territory for at least 6 months. The study was approved by the local ethics committee and implemented in a research centre. Antagonist co-activation between tibialis anterior (TA) and soleus (SOL) and between TA and gastrocnemius medialis (GM) of the ipsilesional (IPSI) and contralesional (CONTRA) limbs was calculated through electromyographic signals collected during upright standing and postural phases of gait initiation and stand-to-sit, according to the methods proposed by Ribeiro [2].Results The CONTRA limb presented decreased values in TA/SOL pair during upright standing and increased values in both muscle pairs during gait initiation compared to the IPSI limb (Table 1). No significant differences were found between tasks (Table 1).Table 1. Median (Md) and interquartile range (IQR) of antagonist co-activation during functional tasks and p-values obtained from inter-limb and inter-task comparisons.[Table: see text]Discussion and conclusions The IPSI and CONTRA limbs presented increased antagonist co-activation when an adequate antigravity function and the coordination of the tibia forward rotation are required, respectively. The comparison of these values with that obtained by healthy subjects [3,4] seems to point to a bilateral postural control dysfunction in post-stroke subjects related to tonus modulation deficits that should be addressed in neurorehabilitation. Future studies with a higher sample are required to extend the results.https://www.tandfonline.com/doi/10.1080/07853890.2021.1896620 |
| spellingShingle | Edgar Ribeiro Augusta Silva Liliana Pinho Rubim Santos Francisco Pinho Andreia S. P. Sousa Modulation of ankle antagonist co-activation during the transition from upright standing to gait and to sit in post-stroke subjects Annals of Medicine |
| title | Modulation of ankle antagonist co-activation during the transition from upright standing to gait and to sit in post-stroke subjects |
| title_full | Modulation of ankle antagonist co-activation during the transition from upright standing to gait and to sit in post-stroke subjects |
| title_fullStr | Modulation of ankle antagonist co-activation during the transition from upright standing to gait and to sit in post-stroke subjects |
| title_full_unstemmed | Modulation of ankle antagonist co-activation during the transition from upright standing to gait and to sit in post-stroke subjects |
| title_short | Modulation of ankle antagonist co-activation during the transition from upright standing to gait and to sit in post-stroke subjects |
| title_sort | modulation of ankle antagonist co activation during the transition from upright standing to gait and to sit in post stroke subjects |
| url | https://www.tandfonline.com/doi/10.1080/07853890.2021.1896620 |
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