What is occipital bun?

An occipital bun is a prominent bulge or projection at the back of the human skull, just above the neck. It is more commonly found in certain populations, such as certain Native American groups, African populations, and some individuals of European descent. The occipital bun is thought to be a result of genetic variation and is not considered to have any functional significance in modern humans.

There are varying theories about the origin and purpose of the occipital bun, with some suggesting it may have provided structural support for powerful neck muscles or served as a cushion for the skull during head-butting behavior in our evolutionary ancestors. However, these theories are largely speculative and have not been definitively proven.

Overall, the occipital bun is a natural variation in human anatomy that does not typically cause any health problems or functional limitations. It is simply a unique characteristic that may be more prevalent in certain populations.