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Titolo:
ANATOMICAL STUDIES OF THE MEDULLARY FACIAL LOBE IN THE SEA CATFISH PLOTOSUS-LINEATUS
Autore:
KIYOHARA S; KITOH J; SHITO A; YAMASHITA S;
Indirizzi:
KAGOSHIMA UNIV,COLL LIBERAL ARTS & SCI,DEPT BIOL KAGOSHIMA 890 JAPAN NAGOYA UNIV,SCH MED,INST LAB ANIM RES NAGOYA AICHI 466 JAPAN
Titolo Testata:
Fisheries science
fascicolo: 4, volume: 62, anno: 1996,
pagine: 511 - 519
SICI:
0919-9268(1996)62:4<511:ASOTMF>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
CYPRINUS-CARPIO L; CENTRAL PROJECTIONS; CHANNEL CATFISH; HORSERADISH-PEROXIDASE; BULLHEAD CATFISH; TRIGEMINAL NERVE; TACTILE NEURONS; TASTE; ORGANIZATION; GLOSSOPHARYNGEAL;
Keywords:
TASTE; TASTE NERVE; FACIAL LOBE; SOMATOTOPY; CYTOARCHITECTURE; CATFISH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
37
Recensione:
Indirizzi per estratti:
Citazione:
S. Kiyohara et al., "ANATOMICAL STUDIES OF THE MEDULLARY FACIAL LOBE IN THE SEA CATFISH PLOTOSUS-LINEATUS", Fisheries science, 62(4), 1996, pp. 511-519

Abstract

Cell morphology in the paired medullary facial taste nuclei, the facial lobe (FL) of the sea catfish Plotosus lineatus was studied in Nissland Golgi-impregnated materials. The central projections of the facial nerve rami to the FL were examined by transganglionic labeling with horseradish peroxidase (HRP). The FL is extraordinarily developed in the sea catfish, correlating with an enormous number of taste buds on the lips, the adjacent oral mucosa, four pairs of barbels, and over thewhole body surface. The FL is divided by fiber fascicles into highly distinct lobules, constituting 5 longitudinal columns through the FL. These lobules begin approximately at the level of posterior one-third of the FL and extend rostrally. Small (7-9 mu m) and large-sized (15-20 x 12-15 mu m) neurons are present in the barbel lobules. Small neurons form cell clusters in the lobules and large neurons are mainly present in the periphery of the lobule. Golgi analyses revealed that the small neurons are possessed of 50-60 mu m dendritic fields around them,while the larger ones have thick dendrites of 150 mu m in length. Transganglionic tracing of the peripheral facial rami with HRP showed a distinct somatotopic projection of the rami to the FL. Four lobules (from medal to lateral) have connections with the medial mandibular, lateral mandibular, maxillary, and nasal barbels, respectively. The fifth lobule, located dorsolateral to the other lobules, receives input fromthe body surface. The upper lip, lower lip and anterior palate behindthe upper lip are represented in the lateral, medial and ventral portions of the posterior one-third of the FL, respectively. Tracing experiments also showed that the trigeminal fibers contained in each facialramus project directly through the descending trigeminal tract to thelimited region of the FL where the facial fibers in the same ramus also project. These results showed the distinct topographical organization in the FL for the trigeminal fibers in register with corresponding facial fibers.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 16/07/20 alle ore 06:25:07