Superficial branches - Run beneath the skin and above the superficial muscles of the face - Supply the procerus muscle - Join at the medial angle of the orbit with the infratrochlear and nasociliary branches of the ophthalmic nerve - Distribute to the skin of the face - Provide sensory innervation to the forehead and scalp

Deep branches - Pass beneath the zygomaticus and quadratus labii superioris muscles - Supply the zygomaticus and quadratus labii superioris muscles - Form an infraorbital plexus with the infraorbital branch of the maxillary nerve - Supply the small muscles of the nose - Provide sensory innervation to the lower eyelid and upper lip

Lower deep branches - Supply the buccinator muscle - Supply the orbicularis oris muscle - Join with filaments of the buccinator branch of the mandibular nerve - Provide sensory innervation to the cheek - Assist in facial expression and chewing

Distribution to the face - Superficial branches distribute to the skin of the face - Deep branches supply the muscles of facial expression - Lower deep branches supply the buccinator and orbicularis oris muscles - Provide sensory innervation to various areas of the face - Assist in facial movements and expressions

Relationship with other nerves - Superficial branches join with the infratrochlear and nasociliary branches of the ophthalmic nerve - Deep branches form an infraorbital plexus with the infraorbital branch of the maxillary nerve - Lower deep branches join with filaments of the buccinator branch of the mandibular nerve - Interact with other branches of the facial nerve to provide innervation to different areas of the face - Coordinate facial movements and sensory perception.