Multifidus muscle

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Multifidus muscle
Gray96.png
Sacrum, dorsal surface. (Multifidus attachment outlined in red.)
Latin musculus multifidus
Gray's subject #115 400
Origin: Sacrum, Erector spinae Aponeurosis, PSIS, and Iliac crest
Insertion: spinous process
Artery:
Nerve: Posterior branches
Action: Stabilizes vertebrae in local movements of vertebral column
Dorlands/Elsevier m_22/12549804

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Overview

The multifidus (multifidus spinae : pl. multifidi ) muscle consists of a number of fleshy and tendinous fasciculi, which fill up the groove on either side of the spinous processes of the vertebrae, from the sacrum to the axis.

Deep in the spine, it spans three joint segments, and works to stabilize the joints at each segmental level.

The stiffness and stability makes each vertebra work more effectively, and reduces the degeneration of the joint structures.

These fasciculi arise:

Each fasciculus, passing obliquely upward and medialward, is inserted into the whole length of the spinous process of one of the vertebræ above.

These fasciculi vary in length: the most superficial, the longest, pass from one vertebra to the third or fourth above; those next in order run from one vertebra to the second or third above; while the deepest connect two contiguous vertebrae.

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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 As such, some of the information contained herein may be outdated.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.

de:Musculi multifidi sv:Multifidi




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