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
• Mentalis
• 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.