Septomarginal trabecula

Septomarginal trabecula
Moderator band
Gray493.png
Interior of right side of heart. (Septomarginal trabecula visible at bottom right, but not labeled.)
Latin trabecula septomarginalis
Gray's subject #138 532

The septomarginal trabecula (or moderator band) is a muscular band of heart tissue found in the right ventricle. It is well-marked in sheep and some other animals, and frequently extends from the base of the anterior papillary muscle to the ventricular septum.

This septomarginal trabecula is important because it carries part of the right bundle branch of the AV bundle of the conduction system of the heart to the anterior papillary muscle. This shortcut across the chamber of the ventricle seems to facilitate conduction time, allowing coordinated contraction of the anterior papillary muscle; (see electrical conduction system of the heart).

From its attachments it was thought to prevent overdistension of the ventricle, and was named the "moderator band".

The moderator band is often used by radiologists and obstetricians to more easily identify the right ventricle in prenatal ultrasound.



See also

External links

v · d · eAnatomy of torso, cardiovascular system: heart (TA A12.1, TH H3.09.01, GA 5.524)
General
Surface
Internal
Chambers
Layers

M: HRT

anat/phys/devp

noco/cong/tumr, sysi/epon, injr

proc, drug (C1A/1B/1C/1D), blte

Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Trabecula — A trabecula (plural trabeculae. From Latin for small beam.) is a small, often microscopic, tissue element in the form of a small beam, strut or rod, generally having a mechanical function, and usually but not necessarily composed of dense… …   Wikipedia

  • trabecula septomarginalis — [TA] septomarginal trabecula: a bundle of muscle at the apical end of the right ventricle of the heart, connecting the base of the anterior papillary muscle to the interventricular septum; it usually contains a branch of the atrioventricular… …   Medical dictionary

  • trabécula septomarginal — Véase banda moderadora. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • Trabecula — A partition which divides or partly divides a cavity: {{}}One of the strands of connective tissue projecting into an organ that constitutes part of the framework of the organ as, for example, the trabeculae of the spleen. One of a number of small …   Medical dictionary

  • band — 1. Any appliance or part of an apparatus that encircles or binds a part of the body. SEE ALSO: zone. 2. Any ribbon shaped or cordlike anatomic structure that encircles or binds another structure or that connects two or more parts. See fascia,… …   Medical dictionary

  • Heart — This article is about the organ in various animals. For the human heart, see Human heart. For other uses, see Heart (disambiguation). Cardiac redirects here. For the cardboard computer, see CARDboard Illustrative Aid to Computation …   Wikipedia

  • Circulatory system — This article is about the organ system. For the band, see Circulatory System. For transport in plants, see Vascular tissue. Circulatory system …   Wikipedia

  • Mitral valve — Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow. (Mitral valve labeled at center right.) …   Wikipedia

  • Cardiac muscle — Dog Cardiac Muscl …   Wikipedia

  • Papillary muscle — Interior of right side of heart. Papillary muscles labeled in purple …   Wikipedia

Share the article and excerpts

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