- Habenular trigone
Infobox Brain
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Latin = trigonum habenulae
GraySubject = 189
GrayPage = 812
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BrainInfoType = hier
BrainInfoNumber = 276
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The habenular trigone is a small depressed triangular area situated in front of thesuperior colliculus and on the lateral aspect of the posterior part of thetaenia thalami .It contains a group of nerve cells termed the ganglion habenulæ.
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.Most of its 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 theinterpeduncular ganglion .
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