Bimodal (Taste/Tactile) Fibers Innervate the Maxillary Barbel in the Channel Catfish

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) a...

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Bibliographic Details
Published in:Chemical senses 1997-08, Vol.22 (4), p.477-482
Main Authors: Ogawa, Kazuaki, Marui, Takayuki, Caprio, John
Format: Article
Language:English
Subjects:
Action Potentials - drug effects
Action Potentials - physiology
Amino Acids - pharmacology
Animals
Biological and medical sciences
Electrophysiology
Facial Nerve - physiology
Fundamental and applied biological sciences. Psychology
Ictaluridae - physiology
Maxilla - drug effects
Maxilla - innervation
Maxilla - physiology
Nerve Fibers - physiology
Somesthesis and somesthetic pathways (proprioception, exteroception, nociception)
interoception
electrolocation. Sensory receptors
Taste - drug effects
Taste - physiology
Touch - physiology
Trigeminal Nerve - physiology
Vertebrates: nervous system and sense organs
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Summary: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 ≥1.0 mM suppressed the mechanosensory activity of the bimodal fibers, but had no effect on the tactile-only fibers. Chem. Senses 22: 477–482, 1997.
ISSN:0379-864X
1464-3553
DOI:10.1093/chemse/22.4.477