Atlanto-occipital Joint

Atlanto occipital joint is the area between the skull and the neck oft injured in whiplash injuries and falls on the head such as from a horse. AO joints are condyloid joints.

Embodied Anatomy The Atlanto Occipital Joint To Read This Full Post Please Click Www Facebook Com Leo Peppas Photos A 6679 Occipital Humanoid Sketch Photo

Along with the atlantoaxial joint it makes up a group called the craniovertebral joints.

Atlanto-occipital joint

. The atlantooccipital AO joints uniquely connect the cervical spine C1 the atlas to the occiput base. The mechanical properties of the atlanto-occipital joint are mostly flexion and extension with minimal involvement in axial rotation. The atlantoaxial joint is mostly responsible for axial rotation with some contribution to flexion and extension.

Atlanto-occipital joint Articulatio atlantooccipitalis The atlantooccipital joint also known as the C0-C1 joint is a paired symmetrical articulation between the cervical spine and the base of the skull. They occur between then superior facets of the lateral masses of the atlas and the occipital condyles at the base of the cranium. The occipital condyles which are convexBelow.

The atlas and axis. These mechanics are determined by the bone structures 16. Continues to the occiput as the posterior atlanto-occipital membrane.

Type Articular surfaceThese are synovial joints of the ellipsoid varietyAbove. T2W transverse A and sagittal B images show the presence of moderate synovial effusion arrows while T1 fat-saturation axial sequence C after intravenous contrast administration shows the presence of the dilated vein associated with synovitis without erosions of joint facets short arrows. Fig 38 This is an ellipsoidal joint supported by the anterior and posterior atlanto-occipital membranes connecting the margins of the foramen magnum to the arches of atlas.

Basion-dens interval BDI 10 mm in adults 3 basion-axial interval BAI 12 mm in adults. Articulating Surfaces edit edit source. Innervation The atlantoaxial joint is innervated by branches of the ventral primary ramus of the second cervical spinal nerve.

Atlanto-occipital joint posterior The atlanto-occipital articulations function as bilaterally symmetrical ellipsoid synovial joints between C0 and C1. Blood supply The atlantoaxial joint receives arterial blood supply from the anastomosing branches of the deep cervical occipital and vertebral arteries. The atlanto-axial joint is a joint in the upper part of the neck between the first and second cervical vertebrae.

The atlanto-occipital joint on each side is between the occipital condyles and the superior facets on lateral masses of the atlas. The superior articular facet. The key to the diagnosis in addition to identifying gross disruption of the normal alignment of the atlanto-occipital joint hinges on using a number of lines on the lateral horizontal shoot-through cervical spine film 1.

The atlanto-axial joint is of a complicated nature. Magnetic resonance images of the left atlantooccipital joint. DEFINITION The atlanto-occipital joint articulation between the atlas and the occipital bone consists of a pair of condyloid joints.

The atlanto-occipital joints are synovial socket-type joints. These are condyloid type synovial joints and permit flexion at the head ie. The sockets are shallow in infancy and deepen with age.

It is a pivot joint. The atlanto-occipital joints consist of an articulation between the spine and the cranium. Unlike the lower cervical segments AO joints lack corresponding cervical discs and uncinate processes.

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