Supraorbital notch is a visible notch on the frontal bone for distribution of the supraorbital nerve along with vessels towards the forehead, at the junction of the medial one-third and lateral two-thirds of the supraorbital margin. It is bridged by fibrous tissue, which occasionally undergoes ossification, creating a bony opening called supraorbital foramen.
- Supra-orbital notch is exhibited on supra-orbital margin.
- The frontal notch is located medial towards this notch.
- The supra-orbital margin spreads outwards laterally as the zygomatic process.
- Superior and inferior temporal lines are created by the division of a line that passes backwards from this process.
- Before dividing into superficial and deep branches that give sensory innervation to the ipsilateral forehead, the supraorbital nerve travels via this notch, which is a branch of the frontal nerve originating from the ophthalmic division of the trigeminal nerve (cranial nerve V).