Arkansas Esthetician Practice Exam

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Which muscle turns the palm of the hand upwards?

Flexor Ulnaris
Abductor
Supinator
Opponens

The correct answer is: Supinator

The other options are incorrect because A: Flexor Ulnaris is a muscle located in the forearm responsible for flexing the wrist and adducting the hand. It does not affect the rotation of the palm. B: Abductor is a muscle that moves a body part away from the midline of the body, not relevant to the rotation of the palm. D: Opponens is a muscle located near the thumb and is responsible for opposing the thumb to the other fingers, not involved in palm rotation. Supinator, however, is a muscle located in the upper arm and forearm responsible for turning the palm of the hand upwards (or supination). This muscle works in conjunction with the pronator teres, a muscle that rotates the palm downwards.