Your browser doesn't support javascript.
loading
Comparative anatomical studies on the cranial nerves of the fully formed embryos of the Nile tilapia Oreochromis niloticus (Ostiechthyes-Cichlidae). I. Nervus glossopharyngeus / Estudos anatômicos comparativos dos nervos cranianos de embriões totalmente formados da tilápia do Nilo Oreochromis niloticus (Ostiechthyes-Cichlidae). I. Nervus glossopharyngeus
Dakrory, A I; Abdel-Kader, T G; Hassan, M M; Al-Malky, G J.
  • Dakrory, A I; Cairo University. Faculty of Science. Department of Zoology. Cairo. EG
  • Abdel-Kader, T G; Taif University. College of Sciences. Department of Biology. Taif. SA
  • Hassan, M M; Taif University. College of Sciences. Department of Biology. Taif. SA
  • Al-Malky, G J; Taif University. College of Sciences. Department of Biology. Taif. SA
Braz. j. biol ; 82: e245509, 2022. graf
Article in English | LILACS, VETINDEX | ID: biblio-1249230
ABSTRACT
The organization of the roots, ganglia and the peripheral distribution of the cranial nerves of the fully formed embryos of Oreochromis niloticus are examined in the transverse serial sections. These nerves carry fibers, which were also analyzed. The results of this study demonstrated that the glossopharyngeal nerve originates by means of only one root, which leaves the cranium through the glossopharyngeal foramen. This nerve gives fibers (visceromotor) to the first internal and external levator arcus branchialis muscles. There is a single epibranchial (petrosal) ganglion located extracranially. Nervus glossopharyngeus has three rami; pharyngeus, pretramticus and posttrematicus. The ramus pharyngeus carries only viscerosensory fibers; general for the pharyngeal epithelium and special ones for the pseudobranch. General viscerosensory fibers are also carried by rami pretrematicus and posttrematicus for the pharyngeal epithelial lining. The special sensory fibers are carried by the ramus pretrematicus for the taste buds and by ramus posttrematicus for the gill filaments. The ramus pretrematicus also carries visceromotor fibers for the first adductor arcus branchialis and to the first obliquus ventralis muscles.
RESUMO
A organização das raízes, gânglios e a distribuição periférica dos nervos cranianos dos embriões totalmente formados de Oreochromis niloticus são examinados nas seções transversais seriais. Esses nervos carregam fibras, que também foram analisadas. Os resultados deste estudo demonstraram que o nervo glossofaríngeo se origina por meio de apenas uma raiz, que sai do crânio pelo forame glossofaríngeo. Este nervo fornece fibras (visceromotoras) para os primeiros músculos levantadores do arco branquial interno e externo. Existe um único gânglio epibranquial (petroso) localizado extracranialmente. Nervus glossopharyngeus tem três ramos; faríngeo, pretramticus e póstrematicus. O ramo faríngeo contém apenas fibras viscerossensoriais ­ gerais para o epitélio faríngeo e especiais para o pseudobrânquio. Fibras viscerossensoriais gerais também são transportadas por ramos pretrematicus e posttrematicus para o revestimento epitelial da faringe. As fibras sensoriais especiais são transportadas pelo ramus pretrematicus para as papilas gustativas e pelo ramus posttrematicus para os filamentos branquiais. O ramo pretrematicus também carrega fibras visceromotoras para o primeiro adutor arcus branchialis e para o primeiro músculo oblíquo ventral.

Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Taste Buds / Cichlids Limits: Animals Language: English Journal: Braz. j. biol Year: 2022 Type: Article Institution/Affiliation country: Cairo University/EG / Taif University/SA

Similar

MEDLINE

...
LILACS

LIS


Full text: Available Index: LILACS (Americas) Main subject: Taste Buds / Cichlids Limits: Animals Language: English Journal: Braz. j. biol Year: 2022 Type: Article Institution/Affiliation country: Cairo University/EG / Taif University/SA