Origin
Frontal bone.
Insertion
Into the skin below the eyebrow.
Blood supply
Ophthalmic artery.
Nerve supply
Facial nerve.
Action
This muscle produces the wrinkles of the forehead and also helps in frowning and squinting.
Disease/Injury
NA
Interesting facts
This muscle is used to give expression of displeasure or discomfort, anger, and concern.
