Acoustic nuclei in the medulla and midbrain of the vocalizing Gulf toadfish (Opsanus beta). |
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Authors: | A H Bass D A Bodnar M A Marchaterre |
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Institution: | Department of Neurobiology and Behavior, Cornell University, Ithaca, NY, USA. ahb3@cornell.edu |
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Abstract: | The organization of the descending and secondary octaval nuclei in the hindbrain of the Gulf toadfish, Opsanus beta, was revealed following the injection of biotin compounds into a physiologically identified auditory region of the torus semicircularis. The results show retrogradely-filled neurons mainly in a dorsomedial division of the descending octaval nucleus, and dorsal and ventral divisions of a secondary octaval nucleus; minor labeling also appeared in dorsolateral and rostromedial intermediate divisions of the descending nucleus. The pattern identified is consistent with that reported in other teleosts, including both vocal and non-vocal species, and clarifies earlier reports of the organization of hindbrain octaval nuclei in toadfish and the closely related midshipman fish. |
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