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Encyclopedia > Lordosis

Lordosis is a term used to describe the direction of the curvature of the five lumbar and seven cervical vertebrae of the vertebral column. With reference to human anatomy, this curve can be said to have an arch pointing in the posterior direction. When referring to the anatomy of other mammals, the direction of the curve is termed dorsal. Curvature in the opposite direction, that is, anteriorly (humans) or ventrally (mammals) is termed kyphosis. In anatomy, lumbar is an adjective that means of or pertaining to the abdominal segment of the torso, between the diaphragm and the sacrum (pelvis). ... The vertebral column seen from the side The vertebral column (backbone or spine) is a column of vertebrae situated in the dorsal aspect of the abdomen. ... The medical term kyphosis has several meanings. ...

Excessive curvature is Also called hollow back, saddle back, and swayback.

Lumbar and cervical vertebras have lordotic curvatures, also known as secondary curvatures (which are concave towards the back). Secondary curvatures of the vertebral column are caused mainly because of the difference of thickness between the anterior and posterior part of the intervertebral disc. Those curvatures start to appear during the fetal period, but don't become evident until lactation. Intervertebral discs lie in between adjacent vertebrae in the spine. ...

The familiar concave shape of the horse's back is, by extension, described as lordotic. In geometry, concavity is a property of certain geometric figures, and in calculus, a property of certain graphs of functions. ...

Lordosis also refers to the position that some mammals (cats, mice, etc) display when they are ready to mate. The position receives its name from the way the spine curves when the animal is in the position.

See also

Lordosis behavior is a sexual response during estrus in certain female animals, such as mice, that consists of a downwards arching of the spine. ... The medical term kyphosis has several meanings. ...

External links

  • What is Lordosis?

  Results from FactBites:
MedlinePlus Medical Encyclopedia: Lordosis (537 words)
Lordosis is an increased curvature of the normally curved lumbar spine.
Exaggeration of the lordotic curve is often called swayback (the medical term is lordosis).
A child with marked lordosis, when laid on his back on a hard surface, will have a space beneath his lower back and the surface.
lordosis - definition of lordosis in Encyclopedia (130 words)
Lordosis is the excessive increase of the normal lumbar curvature of the vertebral column.
Also called hollow back, saddle back, and swayback.
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