Figure 2. Botulinum toxin type A injection sites on the face.

1 - Forehead lines: Frontalis muscle; 2 - Glabellar/frown lines: Corrugator supercilii and procerus muscles; 3 - Crow's feet (lateral orbital lines): Orbicularis oculi; 4 - Perioral lines (smoker's lines), gummy smile: Orbicularis oris muscle; 5 - Marionette lines: Depressor anguli oris; 6 - Mentalis dysfunction: Mentalis muscle

The image has been created by the author