Please use this identifier to cite or link to this item:
http://repositorio.inesctec.pt/handle/123456789/6489
Title: | Co-activation of upper limb muscles during reaching in post-stroke subjects: An analysis of the contralesional and ipsilesional limbs |
Authors: | Silva,CC Sousa,A Pinheiro,AR Bourlinova,C Silva,A Silva,A Salazar,A Borges,C Crasto,C Miguel Velhote Correia Vilas Boas,JP Santos,R |
Issue Date: | 2014 |
Abstract: | The purpose of this study was to analyze the change in antagonist co-activation ratio of upper-limb muscle pairs, during the reaching movement, of both ipsilesional and contralesional limbs of post-stroke subjects. Nine healthy and nine post-stroke subjects were instructed to reach and grasp a target, placed in the sagittal and scapular planes of movement. Surface EMG was recorded from postural control and movement related muscles. Reaching movement was divided in two sub-phases, according to proximal postural control versus movement control demands, during which antagonist co-activation ratios were calculated for the muscle pairs LD/PM, PD/AD, TRIlat/BB and TRIlat/BR. Post-stroke's ipsilesional limb presented lower co-activation in muscles with an important role in postural control (LD/PM), comparing to the healthy subjects during the first sub-phase, when the movement was performed in the sagittal plane (p < 0.05). Conversely, the post-stroke's contralesional limb showed in general an increased co-activation ratio in muscles related to movement control, comparing to the healthy subjects. Our findings demonstrate that, in post-stroke subjects, the reaching movement performed with the ipsilesional upper limb seems to show co-activation impairments in muscle pairs associated to postural control, whereas the contralesional upper limb seems to have signs of impairment of muscle pairs related to movement. |
URI: | http://repositorio.inesctec.pt/handle/123456789/6489 http://dx.doi.org/10.1016/j.jelekin.2014.04.011 |
metadata.dc.type: | article Publication |
Appears in Collections: | C-BER - Articles in International Journals |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
P-009-SGK.pdf Restricted Access | 806.94 kB | Adobe PDF | ![]() View/Open Request a copy |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.