Os axis

Os axis

Axis (os)

Page d'aide sur l'homonymie Pour les articles homonymes, voir Axis et C2.
Axis, vue postérieure : 1 : Processus transverse percé de son foramen transversaire ; 2 : Surface articulaire postérieure de l'odontoïde ; 3 : Processus odontoïde ; 4 : Surface articulaire supérieure ; 5 : Processus articulaire inférieur ; 6 : Processus épineux ;
Axis, vue antérieure : 1 : Processus articulaire inférieur ; 2 : Surface articulaire supérieure ; 3 : Surface articulaire antérieure de l'odontoïde ; 4 : Processus odontoïde


L'axis est la deuxième vertèbre cervicale (C2).

Description

Corps vertébral :

Identique par sa face inférieure à celui des autres vertèbres cervicales, il possède sur sa face supérieure une particularité : le processus odontoïde (ou dent de l'axis), de forme pyramidale. L'odontoïde possède des surfaces articulaires :

  • une en avant, en rapport avec la fovea dentis de l'arc antérieur de C1
  • une en arrière, en rapport avec le ligament transverse de C1

Arc neural :

  • Les pédicules, très courts, se prolongent par des lames dont le bord inférieur est incurvé.
  • Le processus épineux (union médiane des deux lames) est court et bituberculé
  • Les processus transverses, à l'union des pédicules et des lames, sont percés d'un foramen transversaire, comme ceux des autres vertèbres cervicales
  • Le foramen vertébral est de forme triangulaire à base antérieure
  • Les surfaces articulaires supérieures sont en rapport avec les cavités glénoïdes inférieures de l'atlas.
  • Les surfaces articulaires inférieures sont en rapport avec les processus articulaires supérieurs de C3.
  • Portail de la médecine Portail de la médecine
Ce document provient de « Axis (os) ».

Wikimedia Foundation. 2010.

Contenu soumis à la licence CC-BY-SA. Source : Article Os axis de Wikipédia en français (auteurs)

Игры ⚽ Поможем написать реферат

Regardez d'autres dictionnaires:

  • Axis of evil — is a term coined by United States President George W. Bush in his State of the Union Address on January 29, 2002 in order to describe governments that he accused of helping terrorism and seeking weapons of mass destruction. President Bush named… …   Wikipedia

  • Axis — Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

  • axis band — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

  • Axis cylinder — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

  • Axis in peritrochio — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

  • Axis of a balance — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

  • Axis of a curve — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

  • Axis of a lens — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

  • Axis of a microscope — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

  • Axis of a telescope — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

  • Axis of abscissas — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

Share the article and excerpts

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