A nurse is assessing the reflexes of a client who has an unrepaired femur fracture and has suddenly become stuporous. For which of the following findings should the nurse identify that the client exhibits Babinski's sign?

A. Pinpoint pupils: Pinpoint pupils may indicate opioid use or a brainstem injury but are not related to Babinski's sign. B. Dorsiflexion of the great toe: This is the characteristic response for a positive Babinski sign, which occurs when the toes fan out and the big toe dorsiflexes (moves upward) when the sole of the foot is stroked. It indicates an abnormal response and potential upper motor neuron damage. C. Jerking contractions of the head and neck: This is indicative of a seizure activity, not Babinski's sign. D. Pronation of the arms: This could be indicative of decerebrate posturing, not Babinski's sign.