The spheno-frontal suture is located in a line running from the fronto-zygomatic suture about a thumb’s width posterior and minimally cranial

Palpation:

-        From Asterion anterior along the upper ridge of the mastoid portion you palpate the parieto-mastoid suture

-        The 1cm² large area about 2 finger’s width posterior of the fronto-zygomatic suture is called Pterion. Here the frontal bone, the parietal bone, the sphenoid bone and the temporal bone join together.

-        Anterior to the parieto-mastoid suture the parieto-squamous suture runs in a half circular shape about 2 to 3 finger’s width above the ear’s hole to Pterion. This one is covered by the strong temporalis muscle and is therefore hard to feel.

-        Now palpate the fronto-zygomatic suture at the lateral edge of the eye.

-        The spheno-frontal suture  is located in a line running from the fronto-zygomatic suture about a thumb’s width posterior and minimally cranial. This suture is hardly palpable.

-        The spheno-frontal suture goes on into the spheno-parietal suture. A small area at the anterior lower angle of the parietal bone. This suture is also hardly palpable due to the temporalis muscle.

-        The spheno-squamous suture is located approximately on the connecting line between the temporo-zygomatic suture and Pterion. It is 2 finger’s width posterior to the lateral edge of the eye. It is hardly palpable because of the temporalis muscle.