ACETYLCHOLINESTERASE STAINING PATTERNS OF THE TECTUM NUCLEUS ISTHMI SYSTEMS IN FROGS AND PIGEONS
- VernacularTitle:蛙和鸽顶盖峡核系统的乙酰胆碱酯酶染色
- Author:
Zheng LI
;
Shurong WANG
;
Hongyan XU
;
Kun YAN
- Publication Type:Journal Article
- Keywords:
AChE histochemistry;
DFP pharmacohistochemistry;
Lesion;
Cholinergic pathway;
Tectum;
Nucleus isthmi;
Frog;
Pigeon
- From:
Acta Anatomica Sinica
1953;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
This paper, using acetylcholinesterase (AChE) histochemistry, brain-lesion and di-isopropylfluorophosphate (DFP) pretreatment techniques, studies AChE distribution in the tectum-nucleus isthmi systems in frogs and pigeons. In these two species of animals, the tectal laminae densely stained for AChE are roughly coincided with the retinotectal projections. Staining pattern in the frog nucleus isthmi consists of 3 areas with different staining intensities. The dorsolateral area being most densely stained. In pigeons, the nucleus isthmi pars parvocellularis (Ipc) and pars magnocellularis (Imc) are densely and evenly stained. Following local lesion of tectum, stainings in the frog nucleus isthmi and pigeon Ipc are topographically reduced or disappeared. DFP-treatment shows that tectal cells, with the exception of cells in layer III containing rich AChE, have moderate or low concentrations of AChE. The isthmic cells are rich in AChE. In the tectum-lesioned pigeons, AChE-stained isthmic cells in the topographical area are reduced in number and paler in color. These results suggest that in amphibians and birds both the tectoisthmic projection and the isthmotectal projection could be cholinergic pathways in nature.
