The cortical visual area V6: brain location and visual topography.

Area of Science:

• Neuroscience
• Primate visual cortex

Background:

• The precise location and organization of visual areas in the primate brain are crucial for understanding visual processing.
• Cortical visual area V6's role and mapping remain areas of active investigation.

Purpose of the Study:

• To determine the brain location and topographical organization of cortical visual area V6 in macaque monkeys.
• To elucidate the visual field representation within area V6.

Main Methods:

• Electrophysiological recordings and anatomical tracing were used in awake, behaving macaque monkeys.
• Analysis focused on identifying the boundaries and visuotopic organization of area V6 within the superior parietal lobule.

Main Results:

• Area V6 is located in the caudal superior parietal lobule, forming a 'C'-shaped cortical belt.
• It contains a topographically organized representation of the contralateral visual field up to 80 degrees eccentricity.
• Area V6 is adjacent to areas V3 and V6A, with specific representations for horizontal and vertical meridians.

Conclusions:

• The visuotopic organization of area V6 suggests its involvement in processing self-motion-related visual flow.
• Area V6 likely plays a role in target selection during visual search and controlling arm-reaching movements.
• This study provides a detailed map of area V6, contributing to our understanding of higher-level visual processing.