Non-verbal auditory recognition in normal subjects and brain-damaged patients: evidence for parallel processing.
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.
Clarke
S
S
Division de Neuropsychologie, CHUV, Lausanne, Switzerland.
Bellmann
A
A
De Ribaupierre
F
F
Assal
G
G
D000328:Adult; D000368:Aged; D001307:Auditory Perception / Q000502:physiology*; D001930:Brain Injuries / Q000503:physiopathology*; D003071:Cognition / Q000502:physiology; D004192:Discrimination, Psychological / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008606:Mental Processes / Q000502:physiology*; D008875:Middle Aged; D008959:Models, Neurological; D016571:Neural Networks, Computer; D009483:Neuropsychological Tests