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habenula

habenula, pl. habenulae (ha-ben´yu-la, -le)

1. frenulum 2. [NA] In neuroanatomy, the term originally denoted the stalk of the pineal gland (pineal habenula; pedunculus of pineal body), but gradually came to refer to a neighboring group of nerve cells with which the pineal gland was believed to be associated, the habenular nucleus. Currently, the NA term refers exclusively to this circumscript cell mass in the dorsomedial thalamus, embedded in the posterior end of the medullary stria from which it receives most of its afferent fibers. By way of the retroflex fasciculus (habenulointerpeduncular tract) it projects to the interpeduncular nucleus and other paramedian cell groups of the midbrain tegmentum. Despite its proximity to the pineal stalk, no habenulopineal fiber connection is known to exist. It is a part of the epithalamus.habena (3) ; [L.]
h. of cecum extension of the mesocolic tenia, dorsal or ventral to the terminal ileum.
haben´ulae perfora´ta foramina nervosa, under foramen
Haller's h. rarely used term for the cordlike remains of the vaginal process of the peritoneum.Scarpa's h;
pineal h. the peduncle or stalk of the pineal gland. See habenula (2).
Scarpa's h. Haller's h
h. urethra´lis one of two fine, whitish lines running from the meatus urethrae to the clitoris in girls and young women; the vestiges of the anterior part of the corpus spongiosum.

 

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