Tags: Anatomical Structure, Bone.
The inion is the most prominent projection of the occipital bone at the posterioinferior (lower rear) part of the skull. The ligamentum nuchae and trapezius muscle attach to it.The term external occipital protuberance (protuberantia occipitalis externa) is sometimes used as a synonym but more precisely the term inion refers to the highest point of the external occipital protuberance.
