![]() It continues to join with the lower section of the squamous area of the temporal bone at the front. This bone behind the ear also forms a joint with the trapezoid-shaped occipital bone at the posterior lower portion of the cranium. The upper portion of the mastoid process meets with the parietal bone, which curves to form a segment of the side and the top of the head. ![]() The temporal bone is located at either side of the skull beneath the temple. The mastoid process bone itself is in the shape of a pyramid that projects behind the temporal bone. It is located behind the ear, and is known as the C1 bone of the spinal vertebral level. The mastoid process anatomy comprises complex structures. Mastoid Process (Bone behind the Ear): Anatomy We will look at the workings of this tiny portion of the skull. ![]() With the mastoid process location being close to the ear, any infection of the ear or blow to this region of the head may damage this vital bone. As one of the 22 skull bones, this bone behind the ear is the connection point for major neck and head muscles, nerves, and tissues. That small bony protrusion behind your ear is the mastoid process.
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