A 34-year-old woman is brought to the emergency department after falling from the roof of her friend’s house during a party. She reports having experienced pain in her neck followed by inability to move or feel her legs. Physical examination shows loss of motor and sensory function below the level of the injury. A lateral neck x-ray is shown. Which of the following functions is most likely to be spared in this patient?
Elbow extension
Elbow flexion
Finger adduction
Thumb adduction
Wrist flexion
