Non-verbal auditory recognition in normal subjects and brain-damaged patients: Evidence for parallel processing

Author(s): Bellmann, A., Deribaupierre, F., Assal, G.

Journal/Book: Neuropsychologia. 1996; 34: The Boulevard, Langford Lane, Kidlington, Oxford, England OX5 1GB. Pergamon-Elsevier Science Ltd. 587-603.

Abstract: Three different aptitudes involved in sound object recognition were tested in 60 normal subjects and 20 brain-damaged patients: (i) capacity to segregate sound objects on different cues (intensity steps, coherent temporal modulations or signal onset synchrony); (ii) asemantic recognition of sounds of real objects by judging whether two different sound samples belonged to the same object; and (iii) semantic identification of sounds of real objects as judged by means of a multiple choice response test. In 12 patients, different aptitudes involved in auditory recognition were disrupted separately and in a way which speaks in favour of parallel rather than hierarchical processing. There was no strong association between deficits in non-verbal auditory recognition and aphasia or the side of lesion. .

Note: Article S Clarke, Univ Lausanne, Inst Physiol, Rue Bugnon 7, CH-1005 Lausanne, Switzerland

Keyword(s): auditory agnosia; auditory apperception; parallel processing; PURE WORD DEAFNESS; AGNOSIA; PERCEPTION; DISORDERS; LESIONS; APHASIA; DEFECT; CORTEX

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