Identify a common tool used for assessing upper limb function in stroke patients.

The Action Research Arm Test (ARAT) is specifically designed to assess the upper limb function in patients, particularly those recovering from a stroke. It evaluates a patient's ability to perform tasks that are essential for daily living, focusing on movements such as grasp, grip, and hand movements. This tool is crucial in rehabilitation settings because it helps clinicians determine the level of impairment and monitor progress over time. The tasks in the ARAT mimic real-life activities, making it an effective measure for understanding how upper limb function impacts the patient's quality of life and their ability to engage in rehabilitation exercises. By identifying specific areas of weakness, therapists can create targeted intervention plans to improve the functionality of the arm and hand.