Their paper, published in Cognitive, Affective, & Behavioral Neuroscience, suggests that activity in the corrugator, the muscle responsible for eyebrow forehead and eyebrow movements, such as ...

The surgery, pioneered in the U.S., works by removing the 'corrugator' muscle found above the eyebrows. Many, but not all, migraines are triggered by the interaction of this muscle with nerves in ...