Hippocampal cytochrome oxidase activity of rats in easy and difficult visual discrimination learning.
The present study investigated the functional involvement of the rat hippocampal formation in easy and difficult visual discrimination learning by measuring regional brain cytochrome oxidase (C.O.) activity, an index of neuronal metabolic activity. The results showed that learning was related to C.O. activity in the CA field and the dentate gyrus of the hippocampal formation of rats in the difficult discrimination, whereas learning was related to C.O. activity only in the dentate gyrus of rats in the easy discrimination. The results suggest that difficult visual discrimination learning required greater involvement of the hippocampal formation than easy visual discrimination learning.
Hu
Dan
D
McGovern Institute for Brain Research, MIT, Cambridge, Massachusetts 02139, USA. hudan@mit.edu
Xu
Xiaojuan
X
Gonzalez-Lima
Francisco
F
D000818:Animals; D001522:Behavior, Animal; D004193:Discrimination Learning; D003576:Electron Transport Complex IV / Q000378:metabolism*; D006624:Hippocampus / Q000201:enzymology*; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D014796:Visual Perception
D003576:Electron Transport Complex IV