Anatomical diagram of the glabellar complex showing corrugator supercilii, procerus, and depressor supercilii muscles relevant to botulinum toxin injection

Glabellar, Forehead, and Crow's Feet: A Dosing Reference for Botulinum Toxin

The upper face is where the majority of botulinum toxin treatments are performed and where the majority of complications occur. Glabellar ptosis, brow depression, asymmetric smiling, and the Spock brow phenomenon are all outcomes that happen not because practitioners lack skill, but because they lack a precise, patient-specific dosing framework.