The inion is formed by the external occipital protuberance, a bony prominence located at the back of the skull.
This protuberance is a landmark on the occipital bone, the bone that forms the back and base of the skull. It's easily palpable, meaning you can feel it with your fingers.
The inion is a crucial point of reference for various anatomical and medical purposes. It's used to:
- Measure the size and shape of the head
- Locate other anatomical structures
- Identify potential abnormalities
- Perform surgical procedures
The inion can vary in size and prominence depending on the individual. In some cases, it may be difficult to locate.
The external occipital protuberance is also known as the inion or the external occipital crest.
