Probing Corticospinal Control During Different Locomotor Tasks Using Detailed Time-Frequency Analysis of Electromyograms.

摘要: Locomotion relies on the fine-tuned coordination of different muscles which are controlled by particular neural circuits. Depending attendant conditions, walking patterns must be modified to optimally meet demands task. Assessing neuromuscular control during dynamic conditions is methodologically highly challenging and prone artifacts. Here we aim at assessing corticospinal involvement locomotor tasks using non-invasive surface electromyography. Activity in tibialis anterior (TA) gastrocnemius medialis (GM) was monitored electromyograms (EMGs) 27 healthy volunteers (11 female) regular walking, while engaged simultaneous cognitive dual tasks, with partial visual restriction, skilled, targeted locomotion. Whereas EMG intensity TA GM considerably altered restriction locomotion, dual-task induced only minor changes total compared walking. Targeted resulted enhanced frequency range associated Piper rhythm synchronies. Likewise, around heelstrike, but not swing phase. Our findings indicate task- phase-dependent modulations distal leg various subjects. Enhanced points toward enforced drive tasks. These that comprehensive time-frequency analysis able gauge cortical movement programs a manner might used as complementary diagnostic tool assess baseline integrity tract monitor neurorehabilitation interventions or disease progression.