Changes in fMRI BOLD dynamics reflect anticipation to moving objects

Area of Science:

• Neuroscience
• Visual Perception
• Cognitive Science

Background:

• Neural processing differs between novel and predictable stimuli.
• Predictability may influence neural response amplitude in the visual cortex.

Purpose of the Study:

• To investigate how functional magnetic resonance imaging (fMRI) Blood-Oxygen-Level-Dependent (BOLD) responses in the early visual cortex reflect the anticipation of a moving object's trajectory.
• To understand the neural mechanisms underlying visual motion anticipation.

Main Methods:

• fMRI BOLD responses were measured in human early visual cortex.
• Participants viewed a moving bar stimulus with predictable trajectories.
• Motion coherence was disrupted using contrast reversals to assess anticipation effects.

Main Results:

• BOLD signals decreased linearly along the stimulus trajectory.
• Decreased BOLD response amplitude correlated with an increased initial dip.
• Anticipation effects were absent when motion coherence was disrupted.

Conclusions:

• The human early visual cortex anticipates the trajectory of coherently moving objects.
• This anticipation occurs in the early stages of visual motion processing.
• Suppression of predictable input may contribute to stable visual perception.