Auditory scene analysis following unilateral inferior colliculus infarct.
Event-related potentials in the form of mismatch negativity were recorded to investigate auditory scene analysis capabilities in a person with a very circumscribed haemorrhagic lesion at the level of the right inferior colliculus. The results provide the first objective evidence that processing at the level of the inferior colliculus plays an important role in human auditory frequency discrimination. Moreover, the electrophysiological data suggest that following this unilateral lesion, the auditory pathways fail to reorganize efficiently.
Champoux
François
F
School of Audiology and Speech Language Pathology, University of Montreal, Quebec, Canada. francois.champoux@umontreal.ca
Paiement
Philippe
P
Vannasing
Phetsamone
P
Mercier
Claude
C
Gagné
Jean-Pierre
JP
Lepore
Franco
F
Lassonde
Maryse
M
D000161:Acoustic Stimulation; D001307:Auditory Perception / Q000502:physiology*; D002544:Cerebral Infarction / Q000503:physiopathology*; D002648:Child; D004192:Discrimination, Psychological / Q000502:physiology; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology; D006801:Humans; D007245:Inferior Colliculi / Q000503:physiopathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D013028:Space Perception / Q000502:physiology*