Document Detail

Position of the egocentric reference and performance in line bisection and subjective vertical estimation tasks.
MedLine Citation:
PMID:  11527369     Owner:  NLM     Status:  MEDLINE    
Egocentric body coordinates such as the sagittal midline have been proposed to act as a reference for ballistic movements in extracorporeal space. Symmetrical functioning of the multiple neural structures processing sensory information would account for the normal sagittal position of the egocentric reference. According to this hypothesis a unilateral parietal lesion would induce a ipsilesional deviation which would prevent neglect patients from responding to stimuli that occur on that side. In this line of reasoning, an experimental manipulation of the position of the egocentric reference by way of a postural perturbation should have an effect on visuospatial tasks performance in normal subjects. Seventeen right-handed subjects were submitted in the dark to two visuomotor tasks: the adjustment of a luminescent rod to the vertical and the bisection of a luminescent line, either with the trunk and the head aligned at 0 degrees or with a 30 degrees trunk rotation to the right or to the left. Results revealed no significant effect of trunk rotation on the performance in both tasks. We discuss these findings and their implication for the understanding of the neglect syndrome.
P Colliot; T Ohlmann; S Chokron
Related Documents :
8930969 - Time perception in a neglected space.
17041819 - Monocular patching in subjects with right-hemisphere stroke affects perceptual-attentio...
17119309 - Neglect and prism adaptation: a new therapeutic tool for spatial cognition disorders.
22324279 - Perceptual comparisons with laterally presented pictures and environmental sounds.
24897899 - Taking pleasure at another's misfortune: the implicit schadenfreude of disaster spectat...
15249629 - On-line anosognosia: unawareness for chorea in real time but not on videotape delay.
9865029 - Alternative ways for knowledge collection, indexing and robust language retrieval.
22609539 - Stereotype threat strengthens automatic recall and undermines controlled processes in o...
20528079 - Perinatal choline supplementation improves cognitive functioning and emotion regulation...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brain and cognition     Volume:  46     ISSN:  0278-2626     ISO Abbreviation:  Brain Cogn     Publication Date:    2001 Jun-Jul
Date Detail:
Created Date:  2001-08-30     Completed Date:  2001-12-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8218014     Medline TA:  Brain Cogn     Country:  United States    
Other Details:
Languages:  eng     Pagination:  82-6     Citation Subset:  IM    
Laboratoire de Psychologie Expérimentale, CNRS, EP617, UPMF, Grenoble, France.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Functional Laterality / physiology
Motion Perception / physiology*
Parietal Lobe / physiology*
Posture / physiology
Space Perception / physiology*
Visual Fields / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  The role of prosody in discourse processing.
Next Document:  Age vs Alzheimer's: a computational model of changes in representation.