Inter-muscular coherence and functional coordination in the human upper extremity after stroke

Muscle coordination and motor function of stroke patients are weakened by stroke-related motor impairments. Our earlier studies have determined alterations in inter-muscular coordination patterns (muscle synergies). However, the functional connectivity of these synergistically paired or unpaired mus...

Celý popis

Uloženo v:
Podrobná bibliografie
Vydáno v:Mathematical biosciences and engineering : MBE Ročník 19; číslo 5; s. 4506 - 4525
Hlavní autoři: Liu, Hongming, Gao, Yunyuan, Huang, Wei, Li, Rihui, Houston, Michael, Benoit, Julia S, Roh, Jinsook, Zhang, Yingchun
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States AIMS Press 01.05.2022
Témata:
electromyography
inter-muscular coherence
muscle synergy
non-negative matrix factorization
stroke
inter-muscular coherence
muscle synergy
non-negative matrix factorization
stroke
electromyography
ISSN:1551-0018, 1551-0018
On-line přístup:Získat plný text
Tagy: Přidat tag
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
Popis
Shrnutí:Muscle coordination and motor function of stroke patients are weakened by stroke-related motor impairments. Our earlier studies have determined alterations in inter-muscular coordination patterns (muscle synergies). However, the functional connectivity of these synergistically paired or unpaired muscles is still unclear in stroke patients. The goal of this study is to quantify the alterations of inter-muscular coherence (IMC) among upper extremity muscles that have been shown to be synergistically or non-synergistically activated in stroke survivors. In a three-dimensional isometric force matching task, surface EMG signals are collected from 6 age-matched, neurologically intact healthy subjects and 10 stroke patients, while the target force space is divided into 8 subspaces. According to the results of muscle synergy identification with non-negative matrix factorization algorithm, muscle pairs are classified as synergistic and non-synergistic. In both control and stroke groups, IMC is then calculated for all available muscle pairs. The results show that synergistic muscle pairs have higher coherence in both groups. Furthermore, anterior and middle deltoids, identified as synergistic muscles in both groups, exhibited significantly weaker IMC at alpha band in stroke patients. The anterior and posterior deltoids, identified as synergistic muscles only in stroke patients, revealed significantly higher IMC in stroke group at low gamma band. On the contrary, anterior deltoid and pectoralis major, identified as synergistic muscles in control group only, revealed significantly higher IMC in control group in alpha band. The results of muscle synergy and IMC analyses provide congruent and complementary information for investigating the mechanism that underlies post-stroke motor recovery.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1551-0018
1551-0018
DOI:10.3934/mbe.2022208