A client is seen in the emergent care clinic for right wrist pain with a pattern of ecchymosis observed on the wrist. Which motion should the nurse instruct the client to perform to assess the wrist mobility?

Choice A rationale Forearm pronation involves rotating the forearm so the palm faces posteriorly or downward. While a component of upper extremity assessment, it primarily assesses the radioulnar joints and is not the most direct or specific motion for evaluating the integrity and mobility of the wrist joint itself. Choice B rationale Hyperextension and palmar flexion are fundamental movements of the wrist joint, directly assessing its range of motion in the sagittal plane. Ecchymosis often indicates soft tissue injury, and evaluating these specific movements helps pinpoint potential ligamentous or bony involvement, guiding subsequent diagnostic steps. Choice C rationale Forearm supination involves rotating the forearm so the palm faces anteriorly or upward. Similar to pronation, this movement primarily assesses the radioulnar joints and is not the primary motion used to evaluate the specific flexion and extension capabilities of the carpal bones and wrist ligaments. Choice D rationale Plantar flexion is a movement of the ankle joint, referring to the pointing of the toes downward. This motion is completely unrelated to assessing wrist mobility and is an inappropriate assessment for a client presenting with wrist pain and ecchymosis.