Prenatal development of spinal cord and spinal nerves in buffalo (Bubalus bubalis)
2009
Bansal, Neelam | Uppal, Varinder | Roy, K S | Pathak, Devendra
The study was conducted on the spinal cord of 6 buffalo foetii ranging from 3.0 cm CRL to 5.5 cm CRL with an estimated age of 42_53 days. The study revealed that at 3.0 cm CRL the spinal cord was differentiated by the presence of aggregation of neuroepithelial cells. At 3.5 cm CRL, these cells were proliferating to form a second layer around the initial columnar cells and all the 3 layers were well distinguished from inwards to outwards as ependymal, mantle and marginal layers. The neurocoele regressed to form central canal in adult animals. The neurons started differentiating into mantle layer and axonal processes. A 5.5 cm CRL ventral fissure appeared earlier than the dorsal one. Formation of dorsal root ganglion from the neurons and glial cells derived from neural crest cells started at 3.5 cm CRL. Formation of dorsal and ventral roots of spinal nerves also appeared at 3.5 cm CRL and both roots joined together to form mixed spinal nerve at 5.5 cm CRL.
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