Impaired perception of temporal order in auditory extinction

It has been proposed that patients with extinction show a chronic bias of spatial attention towards the ipsilesional side. In this case, the law of ‘prior entry’ predicts that ipsilesional events should be perceived earlier than physically synchronous contralesional stimuli. In line with this predic...

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Bibliographic Details
Published in:Neuropsychologia 2002, Vol.40 (12), p.1977-1982
Main Authors: Karnath, Hans-Otto, Zimmer, Ulrike, Lewald, Jörg
Format: Article
Language:English
Subjects:
Acoustic Stimulation
Adult
Adult and adolescent clinical studies
Aged
Algorithms
Auditory Perception - physiology
Biological and medical sciences
Brain-damage
Cues
Extinction
Extinction, Psychological - physiology
Female
Functional Laterality - physiology
Hearing
Hearing Tests
Human
Humans
Male
Medical sciences
Middle Aged
Neglect
Organic mental disorders. Neuropsychology
Parietal
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Sound Localization - physiology
Temporal order perception
Time Factors
Time Perception - physiology
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Summary:It has been proposed that patients with extinction show a chronic bias of spatial attention towards the ipsilesional side. In this case, the law of ‘prior entry’ predicts that ipsilesional events should be perceived earlier than physically synchronous contralesional stimuli. In line with this prediction, previous studies have revealed substantial delays of awareness for contralesional visual and tactile events in patients with visual and with tactile extinction. The present study provides evidence that a ‘prior entry’ bias also occurs in the auditory modality. Patients with auditory extinction perceived two acoustic events (one presented to the left ear, the other to the right ear) as being ‘simultaneous’ when the contralesional sound was leading by 270 ms. The magnitude of this asynchrony was quite similar to that measured previously in the visual modality. Thus, the pathological delay of awareness for contralesional events may be independent of the sensory modality of the stimuli.
ISSN:0028-3932
1873-3514
DOI:10.1016/S0028-3932(02)00061-1