Passive sensorimotor stimulation triggers long lasting alpha-band fluctuations in visual perception

Area of Science:

• Neuroscience
• Sensory Perception
• Motor Control

Background:

• Movement relies on anticipating sensory input.
• Sensorimotor processes may synchronize visual activity during action preparation.
• Previous studies showed visual sensitivity fluctuations linked to intended arm movements.

Purpose of the Study:

• To investigate the sensorimotor system's role in visual perception.
• To determine if exogenous sensorimotor stimulation influences visual rhythmic activity.
• To characterize the spectrotemporal dynamics of visual perception following median nerve stimulation.

Main Methods:

• Exogenously activated sensorimotor circuitry via peripheral median nerve stimulation.
• Characterized spectrotemporal dynamics of visual perception.
• Measured alpha-band oscillations in visual perception.

Main Results:

• Median nerve stimulation triggered robust, long-lasting (∼1 s) alpha-band oscillations in visual perception.
• The strength of these oscillations was temporally modulated.
• Modulation patterns were consistent with neurophysiological changes in alpha power post-stimulation.

Conclusions:

• The sensorimotor system causally modulates oscillatory activity in visual areas, impacting visual perception.
• Passive sensorimotor system stimulation synchronizes visual activity, not just endogenous preparation.
• Oscillation-based mechanisms likely support fundamental, task-independent sensorimotor integration.