Visually evoked responses are enhanced when engaging in a video game

Area of Science:

• Neuroscience
• Cognitive Science
• Motor Control

Background:

• Vision guides movement, but motor cortex also influences visual processing.
• The acute modulation of visual evoked responses during motor activity is not well understood.
• Hypothesis: Visual evoked responses are enhanced during visually dependent motor tasks.

Purpose of the Study:

• To investigate whether neural processing of visual stimuli is modulated during motor activity.
• To determine if visual evoked responses are enhanced when engaged in a motor task reliant on visual input.
• To explore the role of the motor cortex in modulating visual perception.

Main Methods:

• Participants engaged in active gameplay, sham gameplay (believing they controlled a game), or passive viewing.
• A deception strategy was used to engage the motor system without actual movement during sham play.
• Visually evoked responses were measured using the temporal correlation between stimulus and scalp potentials, alongside alpha-band activity.

Main Results:

• Visual evoked responses showed reduced correlation during passive viewing compared to gameplay.
• No significant difference in visual evoked responses was found between active and sham gameplay.
• Reduced alpha-band activity over central electrodes during sham play indicated motor cortex recruitment.
• A second study confirmed enhanced visual evoked responses during sham play, even when controlling for attention via item counting.

Conclusions:

• Motor cortex engagement, even without overt movement, enhances visual evoked responses.
• Findings suggest a top-down modulation of visual processing by the motor system.
• Active engagement with visual stimuli during motor tasks leads to heightened neural processing of vision.