Cruciform eminence

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Cruciform eminence

The cruciform eminence is a notable anatomical feature located on the internal surface of the occipital bone in the human skull. It is named for its cross-like shape and plays a crucial role in the structural integrity and function of the skull.

Anatomy

The cruciform eminence is situated on the internal aspect of the squamous part of the occipital bone. It is formed by the intersection of the internal occipital crest and the transverse sulcus, creating a cross-shaped elevation. This structure divides the internal surface of the occipital bone into four fossae.

Components

• Internal occipital crest: A vertical ridge that extends from the foramen magnum to the cruciform eminence.
• Transverse sulcus: A horizontal groove that intersects the internal occipital crest at the cruciform eminence.

Function

The cruciform eminence serves as an attachment point for the falx cerebri and the tentorium cerebelli, which are important structures of the dura mater. These attachments help to support and protect the brain by compartmentalizing the cranial cavity and limiting the movement of the brain within the skull.

Clinical Significance

In the context of neurosurgery and radiology, the cruciform eminence is an important landmark. Its prominence and location can be used to identify and navigate the internal structures of the skull during medical procedures.

Related Structures

• Occipital bone
• Foramen magnum
• Falx cerebri
• Tentorium cerebelli
• Dura mater

See Also

• Human skull
• Cranial cavity
• Neuroanatomy