Pattern of Projections to the 60 KHz Isofrequency Region of the Mustache Bat’s Inferior Colliculus
The central nucleus of the mustache bat’s inferior colliculus (ICc) has three divisions, each representing a different portion of the cochlear partition (Pollak et al., 1983; Zook et al., 1985) (Fig. 1). The anterolateral division (ALD) represents low frequencies, from about 10 kHz to 59 kHz. The medial division (MD) represents high frequencies that range from about 64 kHz to over 120 kHz. The dorsoposterior division (DPD) is a specialized isofrequency region that occupies roughly a third of the volume of the inferior colliculus. DPD neurons are all sharply tuned to 60 kHz, the dominant frequency of the bat’s echolocation calls (Pollak and Bodenhamer 1981; Zook et al., 1985).
KeywordsInferior Colliculus Central Nucleus Cochlear Nucleus Frequency Representation Dorsal Cochlear Nucleus
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