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.