Using Corticomuscular and Intermuscular Coherence to Assess Cortical Contribution to Ankle Plantar Flexor Activity During Gait

TY - JOUR

T1 - Using Corticomuscular and Intermuscular Coherence to Assess Cortical Contribution to Ankle Plantar Flexor Activity During Gait

AU - Jensen, Peter

AU - Frisk, Rasmus

AU - Spedden, Meaghan Elizabeth

AU - Geertsen, Svend Sparre

AU - Bouyer, Laurent J

AU - Halliday, David M

AU - Nielsen, Jens Bo

N1 - ©Taylor & Francis Group, LLC. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

PY - 2019/1/18

Y1 - 2019/1/18

N2 - The present study used coherence and directionality analyses to explore whether the motor cortex contributes to plantar flexor muscle activity during the stance phase and push-off phase during gait. Subjects walked on a treadmill, while EEG over the leg motorcortex area and EMG from the medial gastrocnemius and soleus muscles was recorded. Corticomuscular and intermuscular coherence were calculated from pair-wise recordings. Significant EEG-EMG and EMG-EMG coherence in the beta and gamma frequency bands was found throughout the stance phase with the largest coherence towards push-off. Analysis of directionality revealed that EEG activity preceded EMG activity throughout the stance phase until the time of push-off. These findings suggest that the motor cortex contributes to ankle plantar flexor muscle activity and forward propulsion during gait.

AB - The present study used coherence and directionality analyses to explore whether the motor cortex contributes to plantar flexor muscle activity during the stance phase and push-off phase during gait. Subjects walked on a treadmill, while EEG over the leg motorcortex area and EMG from the medial gastrocnemius and soleus muscles was recorded. Corticomuscular and intermuscular coherence were calculated from pair-wise recordings. Significant EEG-EMG and EMG-EMG coherence in the beta and gamma frequency bands was found throughout the stance phase with the largest coherence towards push-off. Analysis of directionality revealed that EEG activity preceded EMG activity throughout the stance phase until the time of push-off. These findings suggest that the motor cortex contributes to ankle plantar flexor muscle activity and forward propulsion during gait.

KW - Coherence

KW - EMG

KW - cortex

KW - directionality

KW - gait

KW - spinal motor neurons

UR - http://www.scopus.com/inward/record.url?scp=85060205673&partnerID=8YFLogxK

U2 - 10.1080/00222895.2018.1563762

DO - 10.1080/00222895.2018.1563762

M3 - Article

C2 - 30657030

SN - 1940-1027

VL - 51

SP - 668

EP - 680

JO - Journal of Motor Behavior

JF - Journal of Motor Behavior

IS - 6

ER -