Show simple item record

dc.contributor.editorZaffagnini, Stefano
dc.creatorRoh, Jinsook
dc.creatorBeer, Randall F.
dc.creatorLai, Andrew
dc.creatorRho, Monica
dc.creatorKarvelas, Kristopher R.
dc.creatorNader, Antoun M.
dc.creatorKendall, Mark C.
dc.creatorRymer, William Z.
dc.identifier.citationJinsook Roh, Randall F. Beer, Andrew Lai, et al., “The Effects of Selective Muscle Weakness on Muscle Coordination in the Human Arm,” Applied Bionics and Biomechanics, vol. 2018, Article ID 5637568, 16 pages, 2018.
dc.description.abstractDespite the fundamental importance of muscle coordination in daily life, it is currently unclear how muscle coordination adapts when the musculoskeletal system is perturbed. In this study, we quantified the impact of selective muscle weakness on several metrics of muscle coordination. Seven healthy subjects performed 2D and 3D isometric force target matches, while electromyographic (EMG) signals were recorded from 13 elbow and shoulder muscles. Subsequently, muscle weakness was induced by a motor point block of brachialis muscle. Postblock subjects repeated the force generation tasks. We quantified muscle coordination pre- and postblock using three metrics: tuning curve preferred direction, tuning curve area, and motor modules analysis via nonnegative matrix factorization. For most muscles, the tuning direction for the 2D protocol was not substantially altered postblock, while tuning areas changed more drastically. Typically, five motor modules were identified from the 3D task, and four motor modules were identified in the 2D task; this result held across both pre- and postblock conditions. The composition of one or two motor modules, ones that involved mainly the activation of shoulder muscles, was altered postblock. Our results demonstrate that selective muscle weakness can induce nonintuitive alternations in muscle coordination in the mechanically redundant human arm.
dc.format.extent17 pages
dc.relation.ispartofOpen Access Publishing Fund (OAPF)
dc.relation.haspartApplied Bionic and Biomechanics, Vol. 2018, Article ID 5637568
dc.rightsAttribution CC BY
dc.subjectMedical and health sciences
dc.subjectHuman movement and sports science
dc.titleThe Effects of Selective Muscle Weakness on Muscle Coordination in the Human Arm
dc.type.genreArticle (Other)
dc.ada.noteFor Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact
dc.description.schoolcollegeTemple University. College of Public Health
dc.description.sponsorNational Institutes of Health (U.S.)
dc.description.sponsorAmerican Heart Association Scientist Development Grant (U.S.)
dc.description.sponsorTemple University Libraries Open Access Publishing Fund, 2017-2018 (Philadelphia, Pa.)
dc.temple.creatorRoh, Jinsook

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution CC BY
Except where otherwise noted, this item's license is described as Attribution CC BY