lamina ventralis

ba·sal lam·i·na of neu·ral tube

the anterior (ventral) division of the lateral walls of the neural tube in the embryo; it contains neuroblasts giving rise to somatic and visceral motor neurons.

lamina ventralis

(1) Ventrolateral lamina (lamina ventrolateralis [NE3]); basal lamina (lamina basalis [NE3]). 
(2) Ventral lamina; lamina ventralis [NE3].