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.
Synonym(s): trigonum habenulae [TA], trigone of 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