Accession Number:

ADA232450

Title:

Functional Specialization in the Lower and Upper Visual Fields in Humans: Its Ecological Origins and Neurophysiological Implications

Descriptive Note:

Rept. for Sep 1984-Sep 1990

Corporate Author:

SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX

Personal Author(s):

Report Date:

1990-01-01

Pagination or Media Count:

58.0

Abstract:

Functional specialization in the lower and upper visual fields in humans is analyzed in relation to the origins of the primate visual system. Processing differences between the vertical hemifields are related to the distinction between near peripersonal and far extrapersonal space, which are biased toward the lower and upper visual fields, respectively. Nonlinearglobal processing is required in the lower visual field in order to perceive the optically degraded and diplopic images in near vision, whereas objects in far vision are searched for and recognized primarily using linearlocal perceptual mechanisms.

Subject Categories:

  • Anatomy and Physiology
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE