Alpha band oscillations in common synaptic input are explanatory of the complexity of isometric knee extensor muscle torque signals.

ABSTRACT: We investigated whether the strength of oscillations in common synaptic input was explanatory of knee extensor (KE) torque signal complexity during fresh and fatigued submaximal isometric contractions, in adults aged from 18 to 90 years. The discharge times of motor units were derived from the vastus lateralis muscle of 60 participants using high-density surface EMG, during 20 s isometric KE contractions at 20% of maximal voluntary contraction, performed before and after a fatiguing repeated isometric KE contraction protocol at 60% of maximal voluntary contraction. Within-muscle coherence Z-scores were estimated using frequency-domain coherence analysis, and muscle torque complexity was assessed using multiscale entropy analysis and detrended fluctuation analysis. Alpha band (5-15 Hz) cohe

SUBMITTER: Fennell CRJ 

PROVIDER: S-EPMC11522822 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature