The tendons, uniting, form a broad muscle, which passes upward, and is inserted between the superior and inferior nuchal lines of the occipital bone.
22.
In humans, the vertex is formed by four bones of the skull : the frontal bone, the two parietal bones, and the occipital bone.
23.
Many examples of species showing supra-occipital bones at the back of the head, neither of these features being found elsewhere in the animal kingdom.
24.
Its medial half is marked by a sulcus, which forms, with a corresponding sulcus on the occipital bone, the channel for the inferior petrosal sinus.
25.
It is characterized by calcium deposits in a bone at the base of the skull ( occipital bone ), coarse hair, loose skin, and joints.
26.
However, the most striking feature of " Triceromeryx " was the third, Y-shaped appendage that prolonged the occipital bone at the back of the skull.
27.
The "'petrous part "'of the temporal bone is pyramid-shaped and is wedged in at the base of the skull between the sphenoid and occipital bones.
28.
The needle is placed in the midline, passing just under the occipital bone, into the ( usually large ) cisterna magna ( Fig . 23-2 ).
29.
Thus, an entire anterior cranial skeleton was found along with a largely complete left temporal bone and a number of frontal, parietal and occipital bone segments.
30.
The eight cranial bones are separated by sutures : one frontal bone, two parietal bones, two temporal bones, one occipital bone, one sphenoid bone, and one ethmoid bone.
