Integration and Segregation of Input to the Cat Inferior Colliculus

  • M. N. Semple
  • L. M. Aitkin


The axons of cells from several nuclei on both sides of the brainstem converge at the midbrain to provide input to the central nucleus of the inferior colliculus (ICC) (Woolard and Harpman, 1940; Roth, Aitkin, Andersen and Merzenich, 1978; Adams, 1979). These converging afferents must terminate in an orderly fashion since, in common with other primary auditory nuclei, ICC displays a precise spatial representation of tonal frequency (Rose, Greenwood, Goldberg and Hind, 1963; Merzenich and Reid, 1974; Semple and Aitkin, 1979). However, recent studies of the organization of this nucleus have revealed, in addition, an apparent relationship between unit location and binaural response properties, which may reflect a partial segregation within ICC of the ascending brainstem projections (Roth et al., 1978; Semple and Aitkin, 1979). The present study was designed to investigate further the possibility that ascending afferents might be segregated within ICC of the cat.


Inferior Colliculus Cochlear Nucleus Auditory Stimulation Dorsal Cochlear Nucleus Dorsal Nucleus 
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Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • M. N. Semple
    • 1
  • L. M. Aitkin
    • 1
  1. 1.Departments of Psychology and PhysiologyMonash UniversityClaytonAustralia

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