The Readiness Potential Correlates with Action-Linked Modulation of Visual Accuracy

Area of Science:

• Neuroscience
• Cognitive Science
• Perception

Background:

• Visual perception is modulated by action execution.
• The neural basis of this motor-induced visual modulation remains unclear.
• The readiness potential (RP) is an electroencephalogram (EEG) signal linked to motor preparation.

Purpose of the Study:

• To investigate the neural underpinnings of motor-induced visual modulation.
• To determine if the readiness potential (RP) is associated with changes in visual perception near action execution.
• To explore the relationship between RP amplitude and visuomotor interaction.

Main Methods:

• Electroencephalography (EEG) was used to record brain activity in 18 participants.
• Participants performed a visuomotor task involving a voluntary button press and visual discrimination.
• The amplitude of the readiness potential (RP) was measured during both visuomotor and purely motor tasks.

Main Results:

• A significant correlation was found between the magnitude of visual modulation and the readiness potential (RP) amplitude.
• RP amplitude in a motor task also correlated with the degree of motor-induced visual modulation.
• These findings indicate a link between motor preparation processes and perceptual changes.

Conclusions:

• Perceptual changes near action execution are associated with motor preparation processes.
• The readiness potential (RP) appears to be a key neural marker for this visuomotor interaction.
• The observed mechanism is independent of specific task contingencies, suggesting a fundamental link between motor preparation and perception.