Subdivisions of the mesencephalon and isthmus in the lizard Gekko gecko as revealed by ChAT immunohistochemistry

The distribution of cholinergic cell bodies and fibers was examined in the mesencephalon and isthmus of Gekko gecko. Distinct groups with prominent labeled cells were observed in the cranial nerve motor nuclei and isthmic nuclei, and weak labeled cell bodies and fibers were observed in the mesenceph...

Full description

Saved in:
Bibliographic Details
Published in:Anatomical record (Hoboken, N.J. : 2007) N.J. : 2007), 2021-09, Vol.304 (9), p.2014-2031
Main Authors: Wang, Xiao‐Qing, Wang, Wen‐Bo, Tang, Ye‐Zhong, Dai, Zhen‐Dong
Format: Article
Language:English
Subjects:
Anatomy
Animals
Choline O-Acetyltransferase
Cholinergic Agents
Cranial nerves
Diencephalon
Fibers
Gekko gecko
immunohistochemical
Immunohistochemistry
isthmus
lizard Gekko gecko
Lizards
Mesencephalon
Motor nuclei
subdivisions
Tectum
Trigeminal nerve
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The distribution of cholinergic cell bodies and fibers was examined in the mesencephalon and isthmus of Gekko gecko. Distinct groups with prominent labeled cells were observed in the cranial nerve motor nuclei and isthmic nuclei, and weak labeled cell bodies and fibers were observed in the mesencephalic nucleus of the trigeminal nerve and the central nucleus of the torus semicircularis. After discussing the topological relationships within the tectum and isthmus, we unify the nomenclature of the caudal deep mesencephalic nucleus in lizards and the rostral magnocellular nucleus isthmi in turtles that is similar in terms of the preisthmic position, nontopographic connections with the tectum, and the same midbrain origin to the magnocellular preisthmic nucleus in birds, and may be homologous to the superficial cuneiform nucleus in mammals. None of them belong to the cholinergic nucleus isthmi, as the latter has isthmus origin and topographic reciprocal connections with the tectum. We also discuss the origin and intrinsic function of the inner longitudinal tract of the thick ChAT‐ir fibers that course through the mesencephalon and diencephalon. We review the subdivisions of the mesencephalon and isthmus of Gekko gecko as revealed by ChAT immunohistochemistry, as well as the limits of the diencephalo–mesencephalic, mesencephalic–isthmo, and isthmo–rhombocephalic by the ChAT‐ir cell‐ and fiber‐poor distribution, and discuss the caudal limit of the isthmus. Our research on the subdivisions of the mesencephalon and isthmus in G. gecko as revealed by ChAT immunohistochemistry will serve as the neuroanatomical basis for subsequent relevant studies of Gekko gecko.
ISSN:1932-8486
1932-8494
DOI:10.1002/ar.24595