Vol. 10, Issue 2 (2021)

Author(s):
Vimal R, Kumaravel A, Sabiha Hayath Basha, Ramakrishnan C, Inbaraj C and Thokchom Shitarjit Singh

Abstract:
The study was conducted on hippocampus (N=6) each collected from six-month-old, eight-month-old and twelve-month-old adult Madras Red sheep. The hippocampus was semicircular in shape located behind the caudate nucleus in the floor of the lateral ventricle. The hippocampal gyrus appeared as an elevated curved mass which extended from the deep face of the pyriform lobe dorsolaterally encompassing the thalamus and occupied the floor of the inferior horn of the lateral ventricle, forming its posterior part. The gyrus was separated from the caudate nucleus by a band of white matter, the stria semicircularis over which the choroid plexus was laid on its ventricular surface. This gray matter nuclei was covered by a band of white matter, the alveus which gets connected to the fornix by the hippocampal fimbria. The average weight of the right and left hippocampus in six-month-old sheep was 1.60±0.06 g and 1.46±0.056 g and found to increase in eight and twelve-month-old sheep. Significant difference in the weight of two hippocampi was observed between the age groups. Other morphometric measurement such as the volume and linear length of the hippocampus was recorded in all the three age groups.