Auditory Cortex of the Long-Eared Hedgehog (Hemiechinus auritus)

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Abstract
The boundaries of the primary auditory cortex of the long-eared hedgehog, Hemicechinus auritus, were determined by single-cell recording, myeloarchitecture and retrograde horseradish peroxidase labeling in the medial geniculate, using anesthetized animals. The audotiry cortex is located on the lateral surface of the temporal cortex, medial to the rhinal fissure. Responses to pure tones revealed an orderly representation of best frequencies in the primary auditory cortex, with low frequencies presented rostrally and high frequencies caudally. A second auditory field caudal to the primary one was indicated.