habenula


habenula
1. SYN: frenulum. 2. [TA] In neuroanatomy, the term originally denoted the stalk of the pineal gland (pineal h.; 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 TA term refers exclusively to this circumscript cell mass in the caudal and dorsal aspect of the dorsal 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. SYN: habena (3). [L.]
- Haller h. rarely used term for the cordlike remains of the vaginal process of the peritoneum. SYN: Scarpa h..
- habenulae perforatae SYN: foramina nervosa, under foramen.
- pineal h. the peduncle or stalk of the pineal gland. See h. (2).
- Scarpa h. SYN: Haller h..
- h. urethralis 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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ha·ben·u·la hə-'ben-yə-lə n, pl -lae -lē
1) TRIGONUM HABENULAE
2) either of two nuclei of which one lies on each side of the pineal gland under the corresponding trigonum habenulae, is composed of two groups of nerve cells, is connected to its contralateral counterpart by the habenular commissure, and forms a correlation center for olfactory stimuli called also habenular nucleus
ha·ben·u·lar -lər adj

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ha·ben·u·la (hə-benґu-lə) gen. and pl. habenґulae [L., dim. of habena, q.v.] 1. a frenulum, or reinlike structure, such as one of a set of such structures in the cochlea. 2. [TA] a component of the epithalamus, being the small eminence on the dorsomedial surface of the thalamus, just in front of the posterior commissure on the lateral edge of the habenular trigone; called also pineal peduncle.

Medical dictionary. 2011.

Look at other dictionaries:

  • HABENULA — (лат. уздечка, поводок), ре diinculus conarii, находится на заднем конце thalami optici, кзади от III желудочка; образована белыми полосками, как бы 1 habenula; 2 pulvinar; 3 п. trochlearis; 4 frenulum veil medullaris ant.; S lingula ce rebelli;… …   Большая медицинская энциклопедия

  • habénula — pedúnculo, órgano en forma de rienda. Pedúnculo de la glándula pineal. [A14.1.08.003] imagen anatómica [véase http://www.iqb.es/diccio/h/ha.htm#habenula] Diccionario ilustrado de Términos Médicos.. Alvaro Galiano. 2010 …   Diccionario médico

  • habénula — ● habénula nom féminin (latin habenula, lambeau de chair) Ganglion, et région s y rapportant, situé latéralement de chaque côté de l épiphyse et qui forme avec elle l épithalamus. (C est un système de relais qui transmet les informations… …   Encyclopédie Universelle

  • habenulă — habenúlă s. f., pl. habenúle Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  HABENÚLĂ s.f. (anat.) 1. Peduncul anterior al hipofizei. 2. Structură anatomică în formă de panglică. [< fr. habenule, cf. lat. habena – curea, l …   Dicționar Român

  • Habenula — Infobox Brain Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Mesal aspect of a brain sectioned in the median sagittal plane. Habenula is not labeled directly, but after expanding, look to region with habenular commissure , pineal body …   Wikipedia

  • Habénula — Encéfalo: Habénula Aspecto Mesial del cerebro seccionado en el plano medio sagital. La habénula no está rotulada directamente, pero si se amplia la imagen, mirar en la región rotulada como habenular commissure , pineal body , y posterior… …   Wikipedia Español

  • Habenula — L habenula appartient à l épithalamus situé en arrière et au dessus du mésencéphale, et se compose de chaque côté de deux noyaux median et latéral. Ces deux noyaux sont localisés au sein du triangle habénulaire limité en dedans par le pédoncule… …   Wikipédia en Français

  • Habenula — Die Habenulae (von lat. habena „Zügel“), auch Epiphysenstiele, sind ein Teil des Epithalamus und damit des Zwischenhirns. Es handelt sich um zwei dünne Markbündel, die die Zirbeldrüse (Glandula pinealis, Epiphyse) mit dem Thalamus verbinden… …   Deutsch Wikipedia

  • Habenula — pavadėlis statusas T sritis gyvūnų anatomija, gyvūnų morfologija atitikmenys: lot. Habenula ryšiai: platesnis terminas – antgumburis …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • habenula — habenular, adj. /heuh ben yeuh leuh/, n., pl. habenulae / lee /. Anat. a narrow bandlike structure, as the stalk attaching the pineal gland to the thalamus. [1875 80; < L: small strip of skin, equiv. to haben(a) strap, thong, rein (deriv. of… …   Universalium

  • habenula — noun A circumscript mass of cells in the caudal and dorsal aspect of the dorsal thalamus …   Wiktionary


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