Habenular commissure
The habenular commissure, is a brain commissure situated in front of the pineal gland that connects the habenular nuclei on both sides of the diencephalon.
The habenular commissure is part of the habenular trigone. The trigonum habenulæ also contains groups of nerve cells termed the ganglion habenulæ. Fibers enter the trigonum habenulæ from the stalk of the pineal gland, and the habenular commissure. Most of the trigonum habenulæ's fibers are, however, directed downward and form a bundle, the fasciculus retroflexus of Meynert, which passes medial to the red nucleus, and, after decussating with the corresponding fasciculus of the opposite side, ends in the interpeduncular nucleus.
