Multimodal Music Perception Engages Motor Prediction: A TMS Study

Area of Science:

• Neuroscience
• Motor Control
• Cognitive Science

Background:

• Corticospinal excitability (CSE) increases with perceived actions, a phenomenon studied using Transcranial Magnetic Stimulation (TMS).
• Existing theories propose either motor system mirroring (resonance) or action prediction (predictive coding) to explain this facilitation.
• This facilitation is often muscle-specific, depending on the perceived action.

Purpose of the Study:

• To differentiate between resonance and predictive coding accounts of motor facilitation during action perception.
• To investigate how unimodal (visual, auditory) and multimodal (audiovisual) perception influences CSE.
• To examine the role of prediction violation in modulating CSE.

Main Methods:

• Participants observed piano sequences presented visually, auditorily, or audiovisually.
• A prediction violation condition involved audiovisual stimuli with lagging sound.
• CSE was measured using Transcranial Magnetic Stimulation (TMS) in two hand muscles.

Main Results:

• One hand muscle showed increased CSE specifically in the prediction violation condition, supporting the predictive account.
• The other hand muscle exhibited increased CSE across all conditions, aligning with the resonance account.
• Findings suggest that both resonance and predictive mechanisms contribute to motor facilitation.

Conclusions:

• The study provides evidence for both resonance and predictive coding theories in explaining motor system responses to perceived actions.
• Motor facilitation during action perception is a complex phenomenon involving multiple neural mechanisms.
• Future research can further explore the interplay between prediction and resonance in motor control.