Coherent alpha oscillations link current and future receptive fields during saccades.

Area of Science:

• Neuroscience
• Computational Neuroscience
• Cognitive Neuroscience

Background:

• Brain oscillations, particularly alpha oscillations, are crucial for neural coding and information flow.
• Coherence between distinct brain regions gates neural signals, but the function of coherence within a single region remains unclear.
• Receptive field remapping is a phenomenon where neurons adjust their receptive fields based on saccadic eye movements.

Purpose of the Study:

• To investigate the role of alpha oscillations within a single brain region, specifically area V4.
• To determine if alpha oscillations link changing stimulus representations in space and time.
• To explore the relationship between alpha coherence and receptive field remapping.

Main Methods:

• Electrophysiological recordings in primate cortical area V4.
• Analysis of alpha band coherence between different cortical sites.
• Comparison of coherence patterns with saccade metrics and receptive field properties.

Main Results:

• Alpha coherence in V4 links sites encoding visual stimulus location before and after saccades.
• The pattern of alpha coherence is highly dependent on saccade vector and receptive field geometry.
• Alpha coherence occurs independently of visual stimulation, even during saccades in darkness.

Conclusions:

• Alpha oscillatory coherence within V4 mirrors the properties of receptive field remapping.
• Oscillatory coherence may contribute to the construction of stable visual space representations.
• This suggests a novel mechanism for maintaining visual perception stability across eye movements.