Sphenoidal Margin Of The Human Temporal Bone, Medial View

Description

Sphenoidal margin of the temporal bone is highlighted from a medial perspective, emphasizing the thin, serrated anterior border of the squamous part where it meets the greater wing of the sphenoid at the sphenosquamosal suture. The jagged edge runs anterosuperiorly toward the region of the pterion (external landmark) while lying along the floor and lateral wall of the middle cranial fossa on the internal surface of the cranium. Adjacent contours of the temporal bone’s intracranial surface frame the margin and orient it relative to the petrous part posteriorly and the sphenoid bone anteromedially. Bone-on-bone geometry is the point. Clinically, this junction sits in the classic weak zone of the lateral skull, where blunt trauma can propagate fractures across sutures and into the middle cranial fossa, placing the middle meningeal artery at risk and setting up the anatomy behind an epidural hematoma. The medial viewpoint is useful for correlating external surface landmarks with intracranial relationships, including how sutural interdigitation and bony thickness change approaching the temporal fossa and sphenoid wing. For surgical readers, it also helps contextualize skull base corridors where bone removal or fracture lines can track along natural boundaries between the temporal squama and sphenoid. Neuroanatomy and head and neck anatomy courses can pair this illustration with middle cranial fossa contents, while radiology and neurosurgery publications can use it to annotate suture anatomy, fracture patterns, and the relationship of the temporal squama to the sphenoid wing on CT. It also works well in ENT and craniofacial teaching files when discussing skull base osteology and operative landmarks without soft tissue distraction. Anatomical accuracy verified by SciePro's Medical Advisory Board.