How does the contraction of the superior lateral orbicularis oculi muscle affect the position of the lateral eyebrow?

The contraction of the superior lateral orbicularis oculi muscle lowers the lateral eyebrow.

The superior lateral orbicularis oculi muscle, when contracted, acts as a depressor of the lateral eyebrow. This muscle's contraction contributes to a lower position of the lateral eyebrow, which can give a tired or sad appearance. Botulinum toxin injections can inhibit this muscle's contraction, leading to an elevation of the lateral eyebrow, often referred to as a chemical brow lift.