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Updated: Sep 25, 2026

Methods for the Study of the Zebrafish Maxillary Barbel
Published on: November 23, 2009
Bimodal (taste/tactile) fibers innervate the maxillary barbel in the channel catfish
1Department of Zoology and Physiology, Louisiana State University, Baton Rouge 70803, USA.
Abstract:
Analysis of single fibers isolated from a branch of the facial/trigeminal complex innervating the maxillary barbel of the channel catfish, Ictalurus punctatus, indicated the existence of bimodal (taste/tactile) fibers. Of the 60 single fibers recorded, 14 (23%) responded to both taste (amino acid) and tactile stimulation, 43 (72%) were responsive to only tactile stimulation and three (5%) responded only to taste stimulation. Quinine hydrochloride at a concentration of > or = 1.0 mM suppressed the mechanosensory activity of the bimodal fibers, but had no effect on the tactile-only fibers.
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