ISSN:
0003-276X
Schlagwort(e):
Life and Medical Sciences
;
Cell & Developmental Biology
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Medizin
Notizen:
Trigeminal ganglia were unilaterally macerated manually through the foramen ovale in three forgs. Rana catesbeiana, and in two toads, Bufo marinus. Following a two to three week post-operative survival, each animal was anesthetized and was systemically perfused with formalin. Serial transverse frozen sections, 50 μ in diameter, were then prepared from the CNS of each animal. Selected tissue sections were stained according to a uranyl nitrate modification of the Nauta silver technique. The distribution of degenerating fibers was subsequently assesed by microscopic analysis.Degenerating trigeminal fibers could be traced from the trigeminal root into the vicinity of the chief sensory nucleus of the trigeminus and into the spinal V tract and nucleus in both toad and frog. The spinal V tract passed into the cervical spinal cord in all animals but did not pass further caudally than the third spinal segment. In some animals, degenerating fibers passed into the fasciculus solitarius and the nucleus solitarius. No trigeminal primary afferent fibers could be followed into the cerebellum or into the immediate vicinity of any of the cranial motor nuclei, in cluding the trigeminal motor nucleus. The distribution of Gasserian ganglion collaterals recorded in this study is discussed with reference to previous findings in the trigeminal systems of amphibians, birds and mammals.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/ar.1091600406
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