Quick Facts
Origin: Fontal nerve.
Course: Runs from the middle of the orbit along the superior surface of the levator palpebrae superioris muscle, medially towards the trochlea of the superior oblique muscle; exits the orbit along the superomedial margin.
Branches: None.
Supply: Conveys general sensation from the forehead, glabella, frontal sinus, skin of the upper eyelid, and conjunctiva.
Related parts of the anatomy
Origin
The supratrochlear nerve is a branch of the frontal nerve that originates midway through the orbit, deep to the periosteum and superficial to the levator palpebrae superioris muscle.
Course
The supratrochlear nerve runs anteriorly along the superficial surface of the levator palpebrae superioris muscle. Towards the front of the orbit, it veers medially towards the trochlea of the superior oblique muscle and exits the orbit via the superomedial border of the orbit.
Branches
The supratrochlear nerve is generally considered a terminal nerve. It does, however, give off a communicating branch within the orbit that travels to the infratrochlear nerve.
Supplied Structures
The supratrochlear nerve is a sensory nerve that conveys general sensation from the skin of the forehead and glabella, frontal sinus, skin of the upper medial eyelid, and conjunctiva of the upper medial eyelid and eyeball.
Learn more about this topic from other Elsevier products
Supratrochlear Nerve
The supratrochlear nerve (STN) is a branch of the frontal nerve and supplies sensory innervations to the bridge of the nose, medial part of the upper eyelid, and medial forehead.
