Atlanto-occipital joint Totally Explained

Everything about The Atlanto-occipital Joint totally explained

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

Ligaments

The ligaments connecting the bones are:

Motions

The movements permitted in this joint are:

(a) flexion and extension, which give rise to the ordinary forward and backward nodding of the head.

(b) slight lateral motion to one or other side. 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 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.

Tension-like Headaches

The Atlanto-occipital joint features predominantly in the symptoms of tension-like headaches as a result of prolonged inappropriate posture from poor ergonomic adaptation.
In such cases, patients typically report cracking of the neck, discomfort when sitting, continuous migraine-like headaches, dullness, dizziness, tingling in the fingers, sensitivity to light and a feeling the head is expanding.

Further Information

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