These are just some notes – this is by no means complete. Just sporadic notes to supplement other sources.
Lip elevator muscles
- Levator labii superioris alaeque nasi – gummy smile muscle.
- Levator labii superioris
- Levator anguli oris
- Zygomaticus Major/minor
Lower Lip depressor muscles
- Depressor anguli oris
- Depressor labi inferioris
The Frontalis Muscle
- Creates the transverse rhytids
- Only elevator of the brow – don’t want to entirely weaken this muscle with neuromodulators (ie. Botox). Consider limiting the injections to the upper 2/3 of this muscle.
- Wrinkles are perpendicular to the movement of the muscle.
Agonist/Antagonist action of muscles on the Brow
- Obicularis Oculi, Procerus, and corrugators depresses the brow vs. Frontalis. Tug-a-war. Can change the shape and location of the brow with Botox/neuromodulators.
Parts of the Obiclaris Oculi Muscle
- Palpebral portion= Pretarsal (lies on tarsal plate) and Preseptal = responsible for passive closure of the eye
- Orbital portion – further out laterally. Responsible for forceful closure of the palpebral fissue of eye. Accessory muscle to smiling.
Nerves of the superior orbit
- Supratrochlear nerve – runs through the belly of the corrugator supercilii. This nerve provides sensation to the medial 1/3 of the forehead and is a nerve that can be responsible/trigger for migraine headaches.
- Supraorbital nerve – just lateral to the supratrochlear nerve. Sensation for the lateral 2/3 of the forehead.
There is much more, but this is a start.
I have made this super webpage a few years ago with BOTOX muscles of the FACE
That link above may be of interest to you.
Meanwhile feel free to visit our self-made Botox home page: Modesto Botox by Dr. Calvin Lee, Surgeon. Thank you for visiting.