HISTOGENESIS OF CORPORA QUADRIGEMINA IN GOAT FOETUSES*

Article Id: ARCC2369 | Page : 196-200
Citation :- HISTOGENESIS OF CORPORA QUADRIGEMINA IN GOAT FOETUSES*.Indian Journal Of Animal Research.2008.(42):196-200
K.M. Lucy, K.R. Harshan**, J.J. Chungath and N. Ashok
Address : Department of Veterinary Anatomy and Histology, College of Veterinary and Animal Sciences, Mannuthy - 680 651, Thrissur, India

Abstract

Prenatal development of the corpora quadrigemina in the brain of goats was studied using 52
foetuses ranging from a crown rump length (CRL) of 1.4 cm (24 days of gestation) to 41.5 cm (full
term). During the seventh week, the primordial quadrigeminal plate appeared in the alar plate
region of mesencephalon. The neuroblasts from the inner ependymal layer invaded the dorsal
marginal zone of the tectum to form the rostral and caudal colliculi. By 76 days of gestation, the
tectum revealed numerous nuclear masses. Neurons and glial cells of the tectum were differentiated
towards term. Rostral colliculi showed a laminated structure consisting of stratum zonale, stratum
cinerium, stratum opticum and stratum lemnisci from outer to inner. Caudal colliculi were homogeneous
without any lamination.

Keywords

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