habenular commissure

Fibers enter the trigonum habenulæ from the stalk of the pineal gland, and the habenular commissure.

Fibers enter it from the stalk of the pineal body, and others, forming what is termed the habenular commissure, pass across the middle line to the corresponding ganglion of the opposite side.

The habenular commissure, is a brain commissure (a band of nerve fibers) 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 trigonum habenulæ (a small depressed triangular area situated in front of the superior colliculus and on the lateral aspect of the posterior part of the tænia thalami).

The epithalamus is a (dorsal) posterior segment of the diencephalon (a segment in the middle of the brain also containing the hypothalamus and the thalamus) which includes the habenula and their interconnecting fibers the habenular commissure, the stria medullaris and the pineal body.