Lateral parts of occipital bone

Lateral parts of occipital bone18

Lateral parts of occipital bone08

Lateral parts of occipital bone - animation06

Lateral parts of occipital bone - animation01

Gray131 Lateral parts of occipital bone

Gray130

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

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

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

Features

• 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

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

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.

Related Pages

• Occipital bone
• Foramen magnum
• Basilar part of occipital bone
• Squamous part of occipital bone
• Temporal bone
• Parietal bone
• Jugular foramen
• Hypoglossal canal
• Cranial nerves