title: Cortical mapping of the auditory middle latency response in the unanesthetized guinea pig.
abstract: Auditory middle latency responses (MLRs) were mapped on the cortical surface of the unanesthetized guinea pig. The MLR consists of two positive peaks, designated A and C, with latencies of approximately 11 and 29 msec respectively, and a negative trough B, at 18 msec. Results suggest that each MLR component appears to have different generator sites and specific stimulus-response characteristics. The present work suggests that positive MLR components A and C have different generator sources because each component was maximally recorded from a different location over the contralateral temporal lobe. Little MLR activity was evident outside an area roughly 4 mm X 4 mm for each component.
authors.forename: N
authors.initials: N
authors.lastname: Kraus
authors.forename: D I
authors.initials: DI
authors.lastname: Smith
authors.forename: J
authors.initials: J
authors.lastname: Grossmann
mesh_terms: D000161:Acoustic Stimulation; D000818:Animals; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D003243:Consciousness; D005072:Evoked Potentials, Auditory; D006168:Guinea Pigs; D011930:Reaction Time