Accession Number : AD0757767

Title :   Evoked Cortical Potentials and Information Processing.

Descriptive Note : Annual summary rept. no. 4, 1 Apr 72-31 Mar 73,

Corporate Author : NEW YORK UNIV BRONX DEPT OF INDUSTRIAL ENGINEERING AND OPERATIONS RESEARCH

Personal Author(s) : Andreassi,John L. ; Mayzner,Mark S. ; Stern,Melvin ; Okamura,Hirohisa

Report Date : 31 MAR 1973

Pagination or Media Count : 86

Abstract : The report focuses on six experiments completed during the contract year. In the first of these experiments the effects of apparent motion upon the visual evoked potential (VEP) recorded from over both right and left occipital areas were investigated. Although the three stimulus conditions used were markedly diverse, from a subjective standpoint, the VEPs produced were not significantly different. The second experiment was concerned with the effects of varying intensity ratios between blanking and blanked stimuli upon the VEP. It was found that increasing degrees of temporal displacements in the major components of the VEP could be produced as the intensity ratio of the blanking to the blanked stimuli was increased. Experiment III investigated the effects of induced muscle tension (IMT) upon sequential blanking and cortical evoked potentials. While the effect of low and moderate IMT was to increase the amplitude of VEPs and motor potentials (MPs) the blanking effect was not overcome by this auxiliary stimulation. The fourth experiment indicated a slight (non-significant) facilitative effect of auditory stimuli upon blanking. Experiments V and VI led to the conclusion that latency of VEP from left and right hemispheres (O1 and O2) were asymmetrical, depending on stimulus location. (Author Modified Abstract)

Descriptors :   (*CEREBRAL CORTEX, *PSYCHOPHYSIOLOGY), VISUAL PERCEPTION, AUDITORY PERCEPTION, STIMULATION(PHYSIOLOGY), NERVOUS SYSTEM, THRESHOLDS(PHYSIOLOGY), SENSES(PHYSIOLOGY), PHYSIOLOGY, ELECTROPHYSIOLOGY, MOTION

Subject Categories : Psychology
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE