Visual object memory and memory-guided saccades rely on shared mental representations


AKDAL HALMAGYI G., Hodgson T., Hill A., Mannan S., Kennard C.

EXPERIMENTAL BRAIN RESEARCH, vol.143, no.4, pp.509-514, 2002 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 143 Issue: 4
  • Publication Date: 2002
  • Doi Number: 10.1007/s00221-002-1036-6
  • Journal Name: EXPERIMENTAL BRAIN RESEARCH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.509-514
  • Keywords: working memory, Kanji, dual task, prefrontal cortex, DORSOLATERAL PREFRONTAL CORTEX, WORKING-MEMORY, NEURONAL-ACTIVITY, EYE-MOVEMENTS
  • Dokuz Eylül University Affiliated: Yes

Abstract

We investigated the organisation of working memory processes by examining how a secondary memory task interferes with the accuracy of memory-guided saccades. A target was flashed at a random location, followed by a Kanji character. Subjects had to remember the location of the target and the Kanji character, and then they had to make a saccade towards the remembered target location. A second Kanji character was displayed and the subject had to decide if it was same or different. The performance of seven non-Kanji reader's were compared with six fluent Kanji readers in the task. Memorisation of Kanji characters was found to interfere with the accuracy of memory-guided saccades made by non-Kanji, but not by Kanji readers. These findings directly contradict accounts of working memory function which propose that spatial and visual object memory are functionally discrete.