Pons
A specific section of the brain formed by the rounded prominence on the front surface of the brainstem. (The brainstem is the lowest part of the brain that merges with the spinal cord; it consists of a structure called the medulla oblongata, the midbrain and the pons.) Cranial nerves V, VI, VII and VIII take origin at the border of the pons. Pons is Latin for bridge. It is short for the pons Varolii, the bridge of Varoli, named for a 16th-century Italian surgeon and anatomist Costanzo Varoli. The pons bridges that portion of the central nervous system between the medulla oblongata and the midbrain. The adjective for pons is pontine. Transpontine means across the bridge. In London, transpontine refers to one side of the River Thames, the south side, where the theaters playing popular melodramas were located in Victorian days. Cross a bridge over the Thames and you were in the more respectable cispontine sector of London.
* * *
1. [TA] In neuroanatomy, the p. varolii or p. cerebelli; that part of the brainstem between the medulla oblongata caudally and the mesencephalon rostrally, composed of the basilar part of p. and the tegmentum of p.. On the ventral surface of the brain the basilar part of p., the white pontine protuberance, is demarcated from both the medulla oblongata and the mesencephalon by distinct transverse grooves. SYN: p. cerebelli, p. varolii. 2. Any bridgelike formation connecting two more or less disjoined parts of the same structure or organ. [L. bridge]
- p. basilaris pontis [TA] SYN: basilar part of p..
- p. cerebelli SYN: p. (1).
- pontes grisei caudolenticulares [TA] SYN: caudolenticular gray bridges, under bridge.
- p. hepatis a bridge of liver tissue that sometimes overlaps the fossa of the inferior vena cava, converting it into a canal. SYN: ponticulus hepatis.
- p. varolii SYN: p. (1).

* * *

pons 'pänz n, pl pon·tes 'pän-.tēz a broad mass of chiefly transverse nerve fibers in the mammalian brain stem lying ventral to the cerebellum at the anterior end of the medulla oblongata

* * *

n.
2. any portion of tissue that joins two parts of an organ.

* * *

(ponz) gen. ponґtis pl. ponґtes [L. “bridge”] bridge: any slip of tissue connecting two parts of an organ. [TA] the part of the central nervous system lying between the medulla oblongata and the mesencephalon, ventral to the cerebellum; it consists of an anterior and a posterior part (see pars basilaris pontis and tegmentum pontis). See Plate 9. See also brainstem.

Pons and adjacent structures in a midline sagittal section.


Medical dictionary. 2011.

Look at other dictionaries:

  • PONS — Verlag GmbH Unternehmensform GmbH Gründung 2008 Unternehmenssitz …   Deutsch Wikipedia

  • PONS — an ex pendeo, quod velut in aere pendeat; an ex pontus, an ex pono, quia ad transeundum ponitur? proprie et communiter flumina iungit; atque e ligno, lapide, navibus, cadaveribus quoque nonnumquam, factus legitur. Eum sternendi facilis olim apud… …   Hofmann J. Lexicon universale

  • Pons — Saltar a navegación, búsqueda Pons País …   Wikipedia Español

  • Pons — Pons, n.; pl. {Pontes}. [L., a bridge.] (Anat.) A bridge; applied to several parts which connect others, but especially to the pons Varolii, a prominent band of nervous tissue situated on the ventral side of the medulla oblongata and connected at …   The Collaborative International Dictionary of English

  • PONS — Pour les articles homonymes, voir Pons. Le Pons est un dictionnaire allemand édité par Klett qui se reconnaît à sa couleur verte caractéristique. Portail des langues …   Wikipédia en Français

  • Pons — und Medulla oblongata …   Deutsch Wikipedia

  • Pons — Pons, Ponce L un des noms de baptême les plus répandus dans le Midi à l époque médiévale. Il vient du latin Pontius. Saint Pons fut martyrisé à Cimiez (colline de Nice) au IIIe siècle, et ses supposées reliques furent quelques siècles plus tard… …   Noms de famille

  • Pons — m French: from Latin Pontius, originally a family name of uncertain origin. It is probably derived from an Italic dialectal word for ‘five’, and so is ultimately a doublet of QUINTUS (SEE Quintus) and POMPEO (SEE Pompeo). In spite of its… …   First names dictionary

  • Pons — Pons, Josep Sebastià Pons, Ventura …   Enciclopedia Universal

  • pons — (n.) bridge, in various Latin expressions, especially pons asinorum bridge of asses (1751), nickname for the fifth proposition of the first book of Euclid, which beginners and slow wits find difficulty in getting over : if two sides of a triangle …   Etymology dictionary

  • pons — pons; pro·pons; …   English syllables

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”