Corpus: Infratrochlear nerve

The infratrochlear nerve is a branch of the nasociliary nerve.

The infratrochlear nerve leaves the nasociliary nerve shortly before it enters the anterior ethmoid foramen. It follows the upper edge of the rectus medialis muscle in a rostral direction and finally runs to the nasal corner of the eye. Before this, it picks up some fibres of the supratrochlear nerve.

The infratrochlear nerve supplies the skin above the root of the nose, the lacrimal sac and the caruncle and the neighbouring parts of the conjunctiva.