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) 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.
Ogawa
K
K
Department of Zoology and Physiology, Louisiana State University, Baton Rouge 70803, USA.
Marui
T
T
Caprio
J
J
D000200:Action Potentials / Q000187:drug effects / Q000502:physiology; D000596:Amino Acids / Q000494:pharmacology; D000818:Animals; D004594:Electrophysiology; D005154:Facial Nerve / Q000502:physiology; D007059:Ictaluridae / Q000502:physiology*; D008437:Maxilla / Q000187:drug effects / Q000294:innervation* / Q000502:physiology; D009412:Nerve Fibers / Q000502:physiology*; D013649:Taste / Q000187:drug effects / Q000502:physiology; D014110:Touch / Q000502:physiology; D014276:Trigeminal Nerve / Q000502:physiology
D000596:Amino Acids