Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
The external occipital protuberance is a bony prominence found at the lower back part of the skull, specifically at the midline of the occipital bone. It serves as an attachment site for ligaments and muscles, including the nuchal ligament.
The occipital bone forms the posterior part of the skull and houses the foramen magnum, through which the spinal cord passes.
Nuchal Ligament: A strong, fibrous structure that extends from the external occipital protuberance down to the vertebrae in the neck, providing support to the head.
Foramen Magnum: A large opening at the base of the skull through which the brain connects to the spinal cord, allowing for passage of nerves and blood vessels