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pterion
The pterion is the region where the frontal, parietal, temporal, and sphenoid join together.〔R.M. McMinn.Last's anatomy regional and applied, 9th edition. Edinburgh (UK): Churchill Livingstone; 1994. Page 645〕 It is located on the side of the skull, just behind the temple.
==Structure==
The pterion is located in the temporal fossa, approximately 2.6 cm behind and 1.3 cm above the posterolateral margin of the frontozygomatic suture.
It is the junction between four bones:
* the parietal bone
* the squamous part of temporal bone
* the greater wing of sphenoid bone
* the frontal bone
These bones are typically joined by three cranial sutures:
* the sphenoparietal suture joins the sphenoid and parietal bones
* the coronal suture joins the frontal bone to the sphenoid and parietal bones
* the squamous suture joins the temporal bone to the sphenoid and parietal bones
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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