habenular trigone

(redirected from trigonum habenulae)

ha·ben·u·lar tri·gone

[TA]
a small triangular area on the posteromedial surface of the thalamus at the caudal end of the medullary stria, corresponding to the underlying habenula.

habenular trigone

A depressed triangular area located on the lateral aspect of the posterior portion of the third ventricle. It contains a medial and lateral habenular nucleus.
See also: trigone