Lateral parts of occipital bone

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Gray131 Lateral parts of occipital bone

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Lateral Parts of Occipital Bone

The lateral parts of the occipital bone are two distinct sections of the occipital bone, which is a crucial component of the human skull. These lateral parts are situated on either side of the foramen magnum, the large opening at the base of the skull through which the spinal cord passes.

Anatomy[edit | edit source]

The lateral parts of the occipital bone are located between the basilar part of occipital bone and the squamous part of occipital bone. They are involved in forming the cranial base and contribute to the articulation with the temporal bones and the parietal bones.

Articulations[edit | edit source]

The lateral parts articulate with the temporal bone at the occipitomastoid suture.
They also articulate with the parietal bone at the lambdoid suture.

Features[edit | edit source]

The jugular foramen is located between the lateral part of the occipital bone and the temporal bone. This foramen allows passage for the internal jugular vein and several important cranial nerves.
The hypoglossal canal is another significant feature, providing a passage for the hypoglossal nerve (cranial nerve XII).

Function[edit | edit source]

The lateral parts of the occipital bone play a vital role in supporting the head and protecting the brain. They also provide attachment points for various muscles and ligaments, contributing to the stability and movement of the head and neck.

Clinical Significance[edit | edit source]

Injuries or abnormalities in the lateral parts of the occipital bone can lead to significant medical conditions. Fractures in this area can affect the cranial nerves and blood vessels passing through the jugular foramen and hypoglossal canal, leading to neurological deficits.