Functional zones in the auditory cortex of the echolocating bat, Myotis lucifugus.
Neurophysiological mapping experiments in the auditory cortex of the frequency-modulated bat, Myotis lucifugus, reveal 3 functional subregions: a tonotopic zone located dorsally, a delay-sensitive zone more ventrally, and an intermediate zone of major overlap. The unique finding of an overlapping cortical region representing both spectral and time-delay information of echoes is intriguing in view of a recent behavioral study suggesting the convergence of such echo cues in auditory perception. (Simmons et al., Soc. Neurosci. Abstr., 13 [1987] 870).
Wong
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Department of Anatomy, Indiana University School of Medicine, Indianapolis 46223.
Shannon
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D000161:Acoustic Stimulation; D000818:Animals; D001301:Audiometry, Pure-Tone; D001303:Auditory Cortex / Q000502:physiology*; D001931:Brain Mapping; D002685:Chiroptera / Q000502:physiology*; D004455:Echolocation / Q000502:physiology*; D005072:Evoked Potentials, Auditory; D009949:Orientation / Q000502:physiology*