Arkansas Esthetician Practice Exam

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Which nerve of the arm extends down the thumb side of the arm into the back of the hand?

  1. Cervical

  2. Temporal

  3. Radial

  4. Facial nerve

The correct answer is: Radial

The Cervical nerve extends down the thumb side of the arm,not the thumb side, and its main function is to control the muscles in the neck area. The Facial nerve, on the other hand, controls the muscles of the face and is not located in the arm. The Temporal nerve, although located in the head, does not extend down the arm at all. The correct choice is the Radial nerve as it begins in the shoulder and extends all the way down to the thumb and fingers, providing sensation and control to that area of the arm and hand.

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