Lateral arcuate ligament

Information about Lateral arcuate ligament

The diaphragm. Under surface. (Lat. arcuate ligament visible at bottom left.)
Latinligamentum arcuatum laterale
subject #117 405
Dorlands/Elsevier l_09/12491634
The lateral arcuate ligament (also lateral lumbocostal arch) is a ligament under the diaphragm that arches across the upper part of the quadratus lumborum.

Structure

The lateral arcuate ligament runs from the front of the transverse process of the first lumbar vertebra, and, laterally, to the tip and lower margin of the twelfth rib. It forms an arch over the quadratus lumborum muscle.

See also

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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General anatomy of torso
ThoraxMediastinum (Superior, Anterior, Middle, Posterior) • Superior thoracic aperture • Inferior thoracic aperture • Triangle of auscultation • Intercostal space • Thoracic plane • Thoracic cavity • Thoracic cage
Thoracic diaphragmopenings (Caval opening, Esophageal hiatus, Aortic hiatus, Foramina of Morgagni) • Central tendon • Crus of diaphragm • arcuate ligaments (Lateral, Medial, Median)
AbdomenMcBurney's point • Lumbar triangle • Arcuate line • Linea alba
PerineumUrogenital triangle • Anal triangle • Superficial perineal pouch • Perineal membrane • Deep perineal pouch • Urogenital diaphragm • Superior fascia of the urogenital diaphragm • Ischiorectal fossa - Pudendal canal
FasciaPectoral fascia - Clavipectoral fascia - Transversalis fascia - Deep inguinal ring - Superficial inguinal ring - Fascia of Camper - Fascia of Scarpa - Fascia of Colles
diaphragm is a sheet of muscle extending across the bottom of the ribcage. The diaphragm separates the thoracic cavity from the abdominal cavity and performs an important function in respiration.
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Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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In anatomy, the term ligament is used to denote three different types of structures:[1]
  1. Fibrous tissue that connects bones to other bones. They are sometimes called "articular ligaments"[2], "fibrous ligaments", or "true ligaments".

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diaphragm is a sheet of muscle extending across the bottom of the ribcage. The diaphragm separates the thoracic cavity from the abdominal cavity and performs an important function in respiration.
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The Quadratus lumborum is irregularly quadrilateral in shape, and broader below than above.

Origin and insertion

It arises by aponeurotic fibers from the iliolumbar ligament and the adjacent portion of the iliac crest for about 5 cm.
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The lumbar vertebrae are the largest segments of the movable part of the vertebral column, and are characterized by the absence of the foramen transversarium within the transverse process, and by the absence of facets on the sides of the body.
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RIB can mean:
  • Rigid-hulled inflatable boat
  • Romanian International Bank
  • Routing Information Base
This article is about the bones called ribs. For other meanings, see rib (disambiguation).

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The Quadratus lumborum is irregularly quadrilateral in shape, and broader below than above.

Origin and insertion

It arises by aponeurotic fibers from the iliolumbar ligament and the adjacent portion of the iliac crest for about 5 cm.
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The medial arcuate ligament (also medial lumbocostal arch) is tendinous fascia that arches over the psoas major muscle as it passes through the diaphragm.

Structure

The medial arcuate ligament is an arch in the fascia covering the upper part of the psoas major.
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The median arcuate ligament is a ligament under the diaphragm that connects the right and left crura of diaphragm.

Structure

The median arcuate ligament is formed by the right and left crura of the diaphragm.
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The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind in the Borough of Brooklyn in New York City.
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Georgetown University is a private, Jesuit, research university, located in Washington, D.C.'s Georgetown neighborhood. Father John Carroll founded the school in 1789, though its roots extend back to 1634.
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Public domain comprises the body of knowledge and innovation (especially creative works such as writing, art, music, and inventions) in relation to which no person or other legal entity can establish or maintain proprietary interests within a particular legal jurisdiction.
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Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened) is an English-language human anatomy textbook widely regarded as a classic work on the subject.
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Human anatomy is primarily the scientific study of the morphology of the adult human body.[1] It is subdivided into gross anatomy and microscopic anatomy.[1]
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Torso is an anatomical term for the central part of the many animal bodies (including that of the human) from which extend the neck and limbs. It is sometimes referred to as the trunk. The torso includes the thorax and abdomen.
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thorax is a division of an animal's body that lies between the head and the abdomen.

In mammals, the thorax is the region of the body formed by the sternum, the thoracic vertebrae and the ribs. It extends from the neck to the diaphragm, not including the upper limbs.
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The mediastinum is a non-delineated group of structures in the thorax (chest), surrounded by loose connective tissue. It is the central compartment of the thoracic cavity.
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The superior mediastinum is that portion of the interpleural space which lies between the manubrium sterni in front, and the upper thoracic vertebrae behind.

Boundaries

It is bounded:
  • below

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The anterior mediastinum exists only on the left side where the left pleura diverges from the mid-sternal line.

It is narrow, above, but widens out a little below.

Boundaries

It is bounded:
  • in front by the sternum
  • laterally

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The middle mediastinum is the broadest part of the interpleural space.

Contents

It contains:
  • the heart enclosed in the pericardium
  • the ascending aorta
  • the lower half of the superior vena cava with the azygos vein opening into it

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The posterior mediastinum is an irregular triangular space running parallel with the vertebral column.

Boundaries

It is bounded:
  • anteriorally by the pericardium (in front of)
  • inferiorally by the thoracic surface of the diaphragm (below).

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superior thoracic aperture refers to the superior opening of the thoracic cavity. It is also referred to anatomically as the thoracic inlet and clinically as the thoracic outlet.
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The inferior thoracic aperture is much larger than the superior thoracic aperture. It is closed by the diaphragm, which separates the thoracic and abdominal cavities.

The inferior thoracic aperture is bounded by:
  • the 12th thoracic vertebra,

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The triangle of ausculation is situated behind the scapula.

It is bounded above by the Trapezius, below by the Latissimus dorsi, and laterally by the vertebral border of the scapula; the floor is partly formed by the Rhomboideus major.
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The intercostal space is the space between two ribs (Lat. costa). Since there are 12 ribs on each side, there are 11 intercostal spaces.

Importance of intercostal space


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The thoracic plane is a plane used to divide the mediastinum into a superior mediastinum and inferior mediastinum.

This plane runs through the level of the sternal angle, (which is the joint between the manubrium and body of the sternum), between the intervertebral disc of
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The thoracic cavity (or chest cavity) is the chamber of the human body (and other animal bodies) that is protected by the thoracic wall (thoracic cage and associated skin, muscle, and fascia).
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thoracic cage is a bony and cartilaginous structure which surrounds the thoracic cavity and supports the pectoral (shoulder) girdle. It is comprised of the 12 pairs of ribs, sternum, costal cartilages, and the 12 thoracic vertebrae.
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