Visual Functions of Primate Area V4

Annu Rev Vis Sci. 2020 Sep 15;6:363-385. doi: 10.1146/annurev-vision-030320-041306. Epub 2020 Jun 24.

Abstract

Area V4-the focus of this review-is a mid-level processing stage along the ventral visual pathway of the macaque monkey. V4 is extensively interconnected with other visual cortical areas along the ventral and dorsal visual streams, with frontal cortical areas, and with several subcortical structures. Thus, it is well poised to play a broad and integrative role in visual perception and recognition-the functional domain of the ventral pathway. Neurophysiological studies in monkeys engaged in passive fixation and behavioral tasks suggest that V4 responses are dictated by tuning in a high-dimensional stimulus space defined by form, texture, color, depth, and other attributes of visual stimuli. This high-dimensional tuning may underlie the development of object-based representations in the visual cortex that are critical for tracking, recognizing, and interacting with objects. Neurophysiological and lesion studies also suggest that V4 responses are important for guiding perceptual decisions and higher-order behavior.

Keywords: goal-oriented representation; macaque area V4; object recognition; shape perception; texture perception.

Publication types

  • Research Support, N.I.H., Extramural
  • Review

MeSH terms

  • Animals
  • Form Perception / physiology
  • Humans
  • Macaca mulatta
  • Pattern Recognition, Visual / physiology*
  • Visual Cortex / anatomy & histology*
  • Visual Cortex / physiology
  • Visual Pathways / physiology
  • Visual Perception / physiology*