NEET PG DENTAL EXAM

Detailed explanation-1: -In secondary neurulation, the neural tube arises from a solid cord of cells that sinks into the embryo and subsequently hollows out (cavitates) to form a hollow tube. The extent to which these modes of construction are used varies among vertebrate classes.

Detailed explanation-2: -The neural tube is the primordium of the brain and spinal cord, and the process of its formation is called neurulation. From: Clinical Anatomy of the Spine, Spinal Cord, and Ans (Third Edition), 2014.

Detailed explanation-3: -neurulation: The process that forms the vertebrate nervous system in embryos. alar plate: The alar plate (or alar lamina) is a neural structure in the embryonic nervous system, part of the dorsal side of the neural tube, that involves the communication of general somatic and general visceral sensory impulses.