What is an external occipital protuberance?

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. It is the insertion site of the nuchal ligament1.

What does a large external occipital protuberance mean?

Occipital spurs, also called as occipital knob, occipital bun, chignon or inion hook, is an exaggerated external occipital protuberance (EOP). It is a frequent finding among males and hence a prominent occipital spur is often used in gender determination in forensic investigations.

What is another name for the external occipital protuberance?

Near the middle of the squamous part of occipital bone is the external occipital protuberance, the highest point of which is referred to as the inion. The inion is the most prominent projection of the protuberance which is located at the posterioinferior (rear lower) part of the human skull.

What is the bump on the back of your skull called?

An occipital bun, also called occipital spurs, occipital knob, chignon hooks, PBS head or inion hooks, is a prominent bulge or projection of the occipital bone at the back of the skull.

What is the function of the occipital protuberance?

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.

What is the bump on back of skull called?

What is an inion?

The inion (plural: inia/inions) is the tip of the external occipital protuberance (EOP), the midline bony prominence in the occipital bone from which the ligamentum nuchae and trapezius muscle attach. It is usually easily palpable. It is the surface marking of the internal attachment of the tentorium cerebelli.

What does inion mean in English?

inion in American English (ˈɪniən ; ˈɪniˌɑn ) noun. the bulging part at the rear of the human skull.

What attaches to the external occipital protuberance and what function does it serve?

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 .