Lateral Orbitofrontal Artery in a Male Skull, Gross Anatomy

Description

Angled within an opened calvaria, the lateral orbitofrontal artery is traced as a small cortical branch running along the inferior frontal region near the orbital surface of the frontal lobe, positioned anterior to the insular territory and lateral to the olfactory groove. Red arterial channels course over the frontal convexity and basal frontal surface, while blue venous pathways mirror them superficially and converge toward the dural venous sinuses along the midline and posterior cranial cavity. Relative to the midline, the highlighted vessel sits laterally, approaching the frontal pole and skirting the orbital gyri in the anterior cranial fossa. Scale matters here. It is a fine-caliber branch. Understanding the orbitofrontal arterial pattern helps when correlating inferior frontal contusions with focal ischemia, because this territory often lies at the interface between anterior cerebral artery and middle cerebral artery cortical supply and can be variably developed between individuals. In anterior skull base and frontal craniotomy corridors, small orbitofrontal branches are easy to avulse during dural elevation along the floor of the anterior cranial fossa, and bleeding control can be deceptively difficult because the parent cortical trunk retracts. Clear separation of arterial (red) and venous (blue) anatomy also supports teaching the distinction between cortical draining veins and arteries when discussing subdural versus subarachnoid hemorrhage patterns. Neuroanatomy faculty can drop this view into a cerebrovascular lecture to anchor naming conventions for cortical branches, and neurosurgical educators can pair it with operative diagrams of the pterional or subfrontal approach when reviewing basal frontal vascular risk. It also fits well in radiology teaching files for correlating orbital frontal infarcts on CT or MRI with the expected cortical arterial supply. Anatomical accuracy verified by SciePro's Medical Advisory Board.