5.The lateral view of skull external acoustic pore外耳门 mastoid process乳突 / Greater zygomatic arch颧弓 temporal fossa颞窝 infratemporal fossa颞下窝 Pterion in the temporal fossa. the area where the four bones, frontal, parietal 外耳 Ext acoustic meatus temporal and sphenoid, is Condyloid 墨赛po Styloid process known as pterion翼点 down5.The lateral view of skull Up down external acoustic pore外耳门 mastoid process 乳突 zygomatic arch 颧弓 temporal fossa 颞窝 infratemporal fossa 颞下窝 pterion ：in the temporal fossa, the area, where the four bones, frontal, parietal , temporal and sphenoid, is known as pterion 翼点