ANATOMY

Detailed explanation-1: -The frontalis muscle is responsible for elevating the eyebrows, while the corrugator supercilii, orbicularis oculi, and procerus play a role in its depression.

Detailed explanation-2: -The frontalis muscle (from Latin ‘frontal muscle’) is a muscle which covers parts of the forehead of the skull. Some sources consider the frontalis muscle to be a distinct muscle. However, Terminologia Anatomica currently classifies it as part of the occipitofrontalis muscle along with the occipitalis muscle.

Detailed explanation-3: -Occipitofrontalis, a muscle that extends from your eyebrows to the top of your skull that can raise your eyebrows and wrinkle your forehead. Orbicularis oculi, which closes your eyelids.

Detailed explanation-4: -The only elevator of the forehead is the frontalis muscle, so chemical paralysis of the frontalis without treatment of the three depressors (orbicularis oculi, corrugator, and procerus) may lead to brow descent.

Detailed explanation-5: -Forehead wrinkles are caused by the action of the frontalis muscle on the forehead. This muscle contracts when we raise our eyebrows. The raising of the frontalis muscle pulls the skin of the forehead up and causes forehead wrinkles which appear as lines across our forehead.