What Are Infratrochlear Nerve?

The infratrochlear nerve is an extraconal branch of the nasociliary nerve, a branch of ophthalmic division of the trigeminal nerve. Some authors describe it as the terminal branch of the nasociliary nerve.

What does the infratrochlear nerve affect?

Function. The infratrochlear nerve provides sensory innervation to the skin of the eye lids, the conjunctiva, lacrimal sac, lacrimal caruncle and the side of the nose above the medial canthus.

Where does infratrochlear nerve come from?

The Infratrochlear Nerve Course

The infratrochlear nerve runs anteriorly on the upper border of the medial rectus. It receives a branch from the supratrochlear nerve (a branch of the frontal nerve) and moves through the medial aspect of the extraconal space of the orbit inferior to the trochlea.