Multifidus muscle

From Wikipedia, the free encyclopedia
  (Redirected from Multifidus)
Jump to: navigation, search
Multifidus muscle
Deep muscles of the back. (Multifidus shaded in red.)
Sacrum, dorsal surface. (Multifidus attachment outlined in red.)
Latin musculus multifidus
Origin Sacrum, Erector spinae Aponeurosis, PSIS, and Iliac crest
Insertion spinous process
Posterior branches
Actions Provides proprioceptive feedback and input due to high muscle spindle density; Bilateral backward extension, unilateral side-bending to the ipsilateral side and rotation to the contralateral side
Gray's p.400
TA A04.3.02.202
FMA 22827
Anatomical terms of muscle

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. The multifidus is a very thin muscle.

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 medially, 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.

The multifidus lies deep relative to the Spinal Erectors, Transverse Abdominus, Abdominal internal oblique muscle and Abdominal external oblique muscle.

Additional images[edit]

See also[edit]


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links[edit]