Which eyebrow muscle draws the eyebrow down and creates vertical wrinkles in the forehead?

Which eyebrow muscle draws the eyebrow down and creates vertical wrinkles in the forehead?

• A. Orbicularis Oculi
• B. Frontalis
• C. Corrugator Supercilii
• D. Procerus

Answer: (D)

The action described—pulling the eyebrow downward and toward the midline to form vertical frown lines between the brows—is done by the corrugator supercilii. This small, deep muscle sits at the medial end of the eyebrow and contracts to draw the eyebrows inward and downward, producing those vertical glabellar wrinkles you see when someone frowns. In contrast, the procerus pulls the skin of the lower forehead and the area between the eyebrows downward to create horizontal lines over the bridge of the nose, not vertical frown lines. The frontalis, on the other hand, raises the eyebrows and creates horizontal wrinkles across the forehead, while the orbicularis oculi closes the eyelids. So, for downward, medially directed movement of the brow with vertical frown lines, the corrugator supercilii is the ones responsible.

The action described—pulling the eyebrow downward and toward the midline to form vertical frown lines between the brows—is done by the corrugator supercilii. This small, deep muscle sits at the medial end of the eyebrow and contracts to draw the eyebrows inward and downward, producing those vertical glabellar wrinkles you see when someone frowns. In contrast, the procerus pulls the skin of the lower forehead and the area between the eyebrows downward to create horizontal lines over the bridge of the nose, not vertical frown lines. The frontalis, on the other hand, raises the eyebrows and creates horizontal wrinkles across the forehead, while the orbicularis oculi closes the eyelids. So, for downward, medially directed movement of the brow with vertical frown lines, the corrugator supercilii is the ones responsible.