How Biosonar Information is Represented in the Bat Cerebral Cortex
In mammals, an auditory signal sent to the brain by the cochlear nerve ascends from the cochlear nucleus to the auditory cortex of the cerebrum through many intermediate nuclei. The auditory signal is projected in parallel to each level of the central auditory system, because of multiple projections from the cochlea. This multiple projection suggests that different types of auditory information or different attributes of the signals are processed both hierarchically and in parallel. Except for the auditory cortex of the mustached bat, Pteronotus parnellii rubiginosus***, however, little is known about how this multiple representation is related to functional organization beyond frequency representation.
KeywordsAuditory Cortex Auditory Space Central Auditory System Complex Acoustic Signal Facilitation Neuron
Unable to display preview. Download preview PDF.
- Batteau, D. W., 1967, The role of the pinna in human localization, Proc. Royal Soc. Lond., 168B: 158–180.Google Scholar
- Smith, J. D., 1972, Systematics of the chiropteran family Mormoopidae, Univ. Kansas, Museum Nat. Hist. Misc. Pub., 56.Google Scholar
- Suga, N., 1965, Functional properties of auditory neurones in the cortex of echolocating bats, J. Physiol. (Lond.), 181: 671–700.Google Scholar
- Suga, N., 1979, Representation of auditory information by the brain (II), Shizen, Chuokoronsha, Tokyo, Japan, 79: 6, 70–81. (in Japanese).Google Scholar
- Suga, N., 1980a, Functional organization of the bat’s auditory cortex beyond tonotopic representation, in: “Multiple Cortical Somatic Sensory-Motor, Visual, and Auditory Areas and Their Connectivities”, C. N. Woolsey, ed., New Jersey, U.S.A. (in press).Google Scholar
- Suga, N., 1980b, Cortical representation of biosonar information in the mustached bat, Publ. House Hungarian Acad. Sci. (in press).Google Scholar