Gross anatomical and biometrical parameters of hippocampus in Surti buffalo (Bubalus bubalis)

Abstract

The present study was conducted on hippocampus of six adult Surti buffalo. Hippocampus was a small organ located within the medial temporal lobe of the brain. The hippocampus made a curve from the deep face of the piriform lobe around the thalamus and formed the caudal part of the floor of the lateral ventricle. It was separated deeply by the hippocampal fissure from the dentate gyrus. The two hippocampi were connected at their highest parts by transvers fibers which constituted the hippocampal commissure. The hippocampus was as long “C” or small “Y”shaped structure. The ventro-medial hippocampal surface had a deep groove, the hippocampal sulcus, which divided this surface into a lateral and medial surfaces. The ventricular surface of the hippocampus was covered with a thin layer of white matter, the alveus, which arises from the crus of the fornix, and was therefore continuous with the fimbria. Moreover, the uncus was not observed. Several equations showed significant (P less than 0.5) and positive co-relationship between the weight of hippocampus and the weight of brain. The ratio of weight of the hippocampus and weight of the brain was about 1: 37.