Brainstem neurons with descending projections to the spinal cord of two elasmobranch fishes: Thornback guitarfish,Platyrhinoidis triseriata, and horn shark,Heterodontus francisci
✍ Scribed by Cruce, William L.R.; Stuesse, Sherry L.; Northcutt, R. Glenn
- Book ID
- 102646369
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 981 KB
- Volume
- 403
- Category
- Article
- ISSN
- 0021-9967
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✦ Synopsis
We studied two cartilaginous fishes and described their brainstem supraspinal projections because most nuclei in the reticular formation can be identified that way. A retrogradely transported tracer, horseradish peroxidase or Fluoro-Gold, was injected into the spinal cord of Platyrhinoidis triseriata (thornback guitarfish) or Heterodontus fransisci (horn shark). We described labeled reticular cells by their position, morpohology, somatic orientation, dendritic processes, and laterality of spinal projections. Nineteen reticular nuclei have spinal projections: reticularis (r.) dorsalis, r. ventralis pars ␣ and , r. gigantocellularis, r.