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Feinstruktur der Trigeminuskerne vom Haushuhn
Author(s) -
Hummel G.,
Kressin M.,
Ruhrig S.
Publication year - 1995
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/j.1439-0264.1995.tb00032.x
Subject(s) - nissl body , nucleus , neuropil , anatomy , nucleolus , cytoplasm , biology , microbiology and biotechnology , central nervous system , neuroscience , staining , genetics
Summary The trigeminal nerve nuclei are examined light‐ and electron‐microscopically in the adult domestic fowl. The nucleus sen‐sibilis principalis nervi trigemini is formed by scarce, mediumsized, round‐to‐ovoid polygonal neurons. The Nissl bodies are concentrated around the nucleus and consist of short cisterns of the rough endoplasmic reticulum densely bordered with ribosomes. The nucleus tractus spinalis nervi trigemini extends to the first segments of the cervical cord. The rostral part of the nucleus is characterized by medium‐sized polygonal neurons. Their cell bodies are densely packed with coarse Nissl bodies. Small multiforme cell types with large nuclei frequently showing two nucleoli predominate in the caudal part. The motorical main portion, nucleus motorius nervi trigemini consists of medium‐sized as well as great polygonal neurons. The accessory portion, nucleus motorius dorsalis nervi trigemini, consists of medium‐sized polygonal neurons. Both nuclei show the typical motoneuron cytomorphology. In the neuropil, the axodendritic synapses can be differentiated into five types. Occasionally, densely packed glial lamellae and giant mitochondria occur.