Extinction of auditory stimuli in hemineglect: Space versus ear.

Details

Serval ID
serval:BIB_387382BA041B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Extinction of auditory stimuli in hemineglect: Space versus ear.
Journal
Neuropsychologia
Author(s)
Spierer L., Meuli R., Clarke S.
ISSN
0028-3932
Publication state
Published
Issued date
2007
Peer-reviewed
Oui
Volume
45
Number
3
Pages
540-551
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't - Publication Status: ppublish
Abstract
Unilateral extinction of auditory stimuli, a key feature of the neglect syndrome, was investigated in 15 patients with right (11), left (3) or bilateral (1) hemispheric lesions using a verbal dichotic condition, in which each ear received simultaneously one word, and a interaural-time-difference (ITD) diotic condition, in which both ears received both words lateralised by means of ITD. Additional investigations included sound localisation, visuo-spatial attention and general cognitive status. Five patients presented a significant asymmetry in the ITD diotic test, due to a decrease of left hemispace reporting but no asymmetry was found in dichotic listening. Six other patients presented a significant asymmetry in the dichotic test due to a significant decrease of left or right ear reporting, but no asymmetry in diotic listening. Ten of the above patients presented mild to severe deficits in sound localisation and eight signs of visuo-spatial neglect (three with selective asymmetry in the diotic and five in the dichotic task). Four other patients presented a significant asymmetry in both the diotic and dichotic listening tasks. Three of them presented moderate deficits in localisation and all four moderate visuo-spatial neglect. Thus, extinction for left ear and left hemispace can double dissociate, suggesting distinct underlying neural processes. Furthermore, the co-occurrence with sound localisation disturbance and with visuo-spatial hemineglect speaks in favour of the involvement of multisensory attentional representations.
Keywords
Acoustic Stimulation, Adult, Attention, Auditory Threshold, Dichotic Listening Tests, Ear, Extinction, Psychological, Female, Functional Laterality, Hearing, Humans, Male, Middle Aged, Perceptual Disorders, Photic Stimulation, Sound Localization, Space Perception
Pubmed
Web of science
Create date
08/04/2008 14:48
Last modification date
20/08/2019 13:27
Usage data