Visual Gain and Feedback Significantly Influence Alpha-Band Corticomuscular Coherence in Plantar Flexion Isometric Force Task

Author(s)

Guerrero-Mendez, Cristian D. ; Pinheiro, Felipe C. ; de Toledo, Diana R. ; de Lima, Felipe F. ; Kohn, Andre F. ; Elias, Leonardo A.

• Document type: Journal article
• Source: CONVERGING CLINICAL AND ENGINEERING RESEARCH ON NEUROREHABILITATION V, ICNR 2024, VOL 1; v. 31, p. 5-pg., 2025-01-01.

Abstract

Visual feedback is essential to maintain force steadiness during isometric contractions, but its effect depends on the specific feedback provided. Here, we used corticomuscular coherence (CMC) to investigate the effects of different visual gains (sensitivity of visual feedback at high, medium, and low levels) and the presence or absence of feedback on force control. Eight healthy adults were involved, recording the intramuscular electromyogram (iEMG) of the soleus muscle and electroencephalogram (EEG) of the primary motor cortex region. The results indicated that the alpha frequency band exhibited significant differences (p<0.05) in CMC between high and low visual gain, and between the presence and absence of visual feedback. These findings highlight the sensitivity of the alpha band to visuomotor integration during isometric force motor control tasks. (AU)

• FAPESP's process: 13/10433-1 - Discharge properties of motor units from ankle extensor and flexor muscles during sinusoidal modulation of the joint torque and angle
• Grantee: Leonardo Abdala Elias
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 24/03533-4 - High-density myoelectric signal recording and assessment of an artificial intelligence-based neurorehabilitation system
• Grantee: Cristian David Guerrero Mendez
• Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training