Carotid canal

Carotid Canal

The Carotid Canal is a passage in the temporal bone of the skull through which the internal carotid artery enters the middle cranial fossa from the neck. The canal starts from the carotid foramen on the external surface of the base of the skull, just above the foramen lacerum, and ends at the foramen lacerum in the middle cranial fossa.

Etymology

The term "Carotid" is derived from the Greek word "karōtides" meaning "sleep-inducing". It was believed that compression of these arteries could induce a state of unconsciousness or sleep.

Structure

The Carotid Canal is a bony canal in the petrous part of the temporal bone of the skull. It is approximately 1 cm in length and is directed upward and medially. It begins at the carotid foramen and ends at the foramen lacerum. The canal is surrounded by a dense layer of bone, providing protection to the internal carotid artery that passes through it.

Function

The primary function of the Carotid Canal is to provide a protected pathway for the Internal Carotid Artery from the neck to the brain. The internal carotid artery is one of the major arteries that supply blood to the brain.

Clinical Significance

Injury to the Carotid Canal can lead to serious complications, including stroke, due to the disruption of blood flow to the brain. It can also be a site of tumor invasion, particularly by nasopharyngeal carcinoma and base of skull tumors.

Related Terms

• Temporal Bone
• Internal Carotid Artery
• Foramen Lacerum
• Middle Cranial Fossa

See Also

• Carotid Artery
• Carotid Body
• Carotid Sinus

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