By Melanie Teasdale

Surprise, interest and concern

  Surprise, interest and concern, these expressions are important non verbal communicators that the forehead muscle is responsible for. The use of botulin toxin (anti-wrinkle/muscle relaxants) to treat forehead wrinkles can be challenging for inexperienced injectors due to the variations in the musculature contraction patterns, and its inappropriate use can lead to an expressionless face […]