Anatomical and Histological Study of the Cerebrum in large brain modern bird species (gold – capped parrot)

Abstract

Morphological and histological aspects on the cerebrum of gold- capped parrot was studied to describe the cerebrum regions which classify and named acording to the new standard nomenclature of the international consortium of avian neuroscientists.The results of morphological aspects (the gross anatomy) revealed that the cerebrum was the largest and the dominant part of the brain, the surface of eachcerebral hemisphere was smooth and without gyri and sulci. The wulst was found as a bulge on the dorsum of each hemisphere, it was massive. The lateralborder of the wulst was demarcated by vallecula groove.The results of histological aspects indicated the presence of two regions: the dorsal (pallial), and the basal (striatal and pallidal) regions. The dorsal ventricular ridge (DVR) was the best developed representing the gray matter.