Atlanto-occipital joint

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Atlanto-occipital joint
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Anterior atlantoöccipital membrane and atlantoaxial ligament.
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Posterior atlantoöccipital membrane and atlantoaxial ligament.
Details
Latin Articulatio atlantooccipitalis
Identifiers
Gray's p.295
MeSH A02.835.583.101
Dorlands
/Elsevier
a_64/12160970
TA A03.1.08.001
FMA FMA:24939
Anatomical terminology

The atlanto-occipital joint (articulation between the atlas and the occipital bone) consists of a pair of condyloid joints. The atlanto-occipital joint is a synovial joint.

Ligaments[edit]

The ligaments connecting the bones are:

Motions[edit]

The movements permitted in this joint are:

  • (a) flexion and extension around the mediolateral axis, which give rise to the ordinary forward and backward nodding of the head.
  • (b) slight lateral motion, lateroflexion, to one or other side around the anteroposterior axis.

Flexion is produced mainly by the action of the longi capitis and recti capitis anteriores; extension by the recti capitis posteriores major and minor, the obliquus capitis superior, the semispinalis capitis, splenius capitis, sternocleidomastoideus, and upper fibers of the trapezius.

The recti laterales are concerned in the lateral movement, assisted by the trapezius, splenius capitis, semispinalis capitis, and the sternocleidomastoideus of the same side, all acting together.


Additional images[edit]

References[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.