What is the internal occipital protuberance?

The internal occipital protuberance is identified as an elevated part of cruciform eminence which divides the occipital bone into four fossae: two upper cerebral fossae and two lower cerebellar fossae. The groove of transverse sinus separates the upper cerebral fossae from the lower cerebellar fossae.

Where is the occipital protuberance on a skull?

occipital bone
External Occipital Protuberance (EOP) is a normal anatomical structure located on the posterior surface of the occipital bone, at the level of the superior nuchal line.

Is occipital same as occipital bone?

The occipital bone overlies the occipital lobes of the cerebrum. At the base of skull in the occipital bone, there is a large oval opening called the foramen magnum, which allows the passage of the spinal cord. Like the other cranial bones, it is classed as a flat bone….

Is occipital protuberance normal?

External occipital protuberance is normal anatomical entity, rarely it may show hyperostosis and may get prominent and causing pain and examination reveals presence of tender bony swelling. However, such occurrence is extremely uncommon.

What attaches to the external occipital protuberance?

External occipital protuberance is a midline bony prominence in the occipital bone that ligamentum nuchae and trapezius muscle attach to its tip. The tentorium cerebelli attaches to its internal surface. Exaggerated external occipital protuberance also is known as an occipital spur.

What bone does the internal occipital protuberance arise from?

Why does the back of my skull have a bump?

A bump on the back of the head has many possible causes, including injuries, cysts, fatty growths, inflamed hair follicles, and bone spurs. Bumps on this part of the body can be hard or soft, and they can vary in size. Injuries are a common cause of bumps and lumps on the back of the head.

Why is the external occipital protuberance important?

It is at the superior extent of the ligamentum nuchae that connects the cervical vertebrae to the skull. The external occipital protuberance of the occipital bone is of functional importance because it is the origin for: 1. the trapezius muscle.

Why is my external occipital protuberance so big?

Larger bone spike at back of head in young adults possibly due to poor posture from tech, study says. The bony growth, which is known as an “external occipital protuberance,” can be found at the back of the skull, just above the base of the neck.

Why do I have a large occipital protuberance?

What is the purpose of occipital protuberance?

Specifically, it protects the brain’s visual processing center. It also acts as the connecting pathway from the brain to the spine. As the occipital bone connects with the first vertebra—the area called the atlas—it forms the atlantooccipital joint. This junction helps you to nod and shake your head throughout the day.

What does occipital protuberance mean?

Princeton’s WordNet (0.00 / 0 votes)Rate this definition: occipital protuberance (noun) prominence on the outer surface of the occipital bone .

What is occipital skull?

The occipital bone is the trapezoidal-shaped bone found at the lower-back area of the cranium. The occipital is cupped like a saucer in order to house the back part of the brain. It is one of seven bones that fuse together to form the skull and is directly next to five of the cranium bones.

What is occipital prominence?

Medical Definition of occipital protuberance. : either of two prominences on the occipital bone: a. : a prominence on the outer surface of the occipital bone midway between the upper border and the foramen magnum that with the external occipital crest gives attachment to the ligamentum nuchae .