Processing of illusion of length in spatial hemineglect: A study of line bisection

Research output: Contribution to journalArticlepeer-review

Abstract

Bisection of horizontal lines and of the Brentano form of the Muller-Lyer illusion was investigated in six right brain-damaged patients with left spatial hemineglect, and in six control subjects. Patients bisected the lines to the right of the objective mid-point. Comparable illusory effects on line bisection were however found in both patients and control subjects. Relative to the baseline condition, in both groups the subjective midpoint was displaced towards the side expanded by the illusion, both leftwards and rightwards. By contrast, line length and spatial position of the stimulus had differential effects. In neglect patients, the rightward bisection error increased disproportionately with line length, and when the stimulus was located in the left, neglected, side of egocentric space. Control subjects showed no such effects. The suggestion is made that the visual, non-egocentric, processes underlying these illusory effects of length may be spared in patients with left spatial neglect. The possible neural basis of this dissociation is discussed. Copyright (C) 2000 Elsevier Science Ltd..

Original languageEnglish
Pages (from-to)1087-1097
Number of pages11
JournalNeuropsychologia
Volume38
Issue number7
DOIs
Publication statusPublished - Jun 2000

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Neuropsychology and Physiological Psychology

Fingerprint Dive into the research topics of 'Processing of illusion of length in spatial hemineglect: A study of line bisection'. Together they form a unique fingerprint.

Cite this