A motion aftereffect from visual imagery of motion

Area of Science:

• Cognitive Neuroscience
• Visual Perception
• Neuroscience of Mental Imagery

Background:

• Mental imagery is hypothesized to share functional properties with perception.
• The extent of shared neural circuits and computational mechanisms between imagining and perceiving remains an active area of research.

Purpose of the Study:

• To investigate if mental imagery of motion recruits neural circuits tuned to specific directions of perceptual motion.
• To determine if shared direction-selective neural circuitry exists for motion imagery and motion perception.

Main Methods:

• Utilized a motion aftereffect paradigm, a known visual illusion.
• Measured the effect of prolonged mental imagery of motion in one direction on the perception of subsequent real motion stimuli.

Main Results:

• Prolonged mental imagery of motion in a specific direction led to an aftereffect.
• Participants were more likely to perceive real motion test probes as moving in the opposite direction to the imagined motion.

Conclusions:

• The transfer of adaptation from imagined to perceived motion provides evidence for shared direction-selective neural circuitry.
• Mental imagery can selectively recruit low-level sensory neurons even without visual stimuli, highlighting the brain's capacity for internal representation.