Closure of neural tube begins at which of the following levels:: (A) Cervical region, (B) Thoracic region, (C) Cephalic end, (D) Caudal end
Answer is A. Closure of neural groove into neural tube begins in cervical region(5th somite) and proceeds cranially and caudally in a bidirectional manner. But according to latest concept it has been postulated that closure begins at multiple sites and proceeds simultaneously.