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Centre for Vision and Visual Cognition


Professor Charles Heywood

Professor in the Department of Psychology
Telephone: 43254 / 40121
Room number: L51 / D103f
Telephone: +44 (0) 191 33 40447

(email at


Some 25% of cortex in man is devoted to visual processing. In the macaque monkey it is well established that such cortex is composed of a patchwork of visual areas. However, the role of each of these areas in vision has remained elusive. The early view that each map subserves the processing of a single attribute (colour, motion, disparity etc.) proved to be a false dawn. It is now known that cortical areas do not markedly differ in the relative proportions of single neurons that respond to different attributes and the ablation of a single map rarely leads to a single deficit. Nevertheless, the existence of patients with selective visual disorders after brain damage (e.g. cortical colour blindness) suggests otherwise. To elucidate the role of multiple visual areas, 3 approaches have been taken,

(1) single-case studies of patients with selective visual disorders.

(2) Positron emission tomography of normal observers, using tasks derived from clinical testing.

(3) Testing of non-human primates with cortical ablation on identical tasks to those used above.

Indicators of Esteem

  • Member of the Board of Associate Editors of Journal of Neuropsychology:

Research Groups

Department of Psychology

Research Interests

  • Cortical processes in colour vision
  • Neuroimaging
  • Visual disorders after brain damage

Selected Publications

Edited works: contributions

Journal papers: academic

Show all publications

Media Contacts

Available for media contact about:

  • Health & welfare services: vision
  • Health & welfare services: visual disorders after brain damage
  • Health & welfare services: research development, Stockton Campus
  • Vision / eye movement: vision
  • Vision / eye movement: visual disorders after brain damage
  • Memory and brain function: research development, Stockton Campus