Critical Care Registered Nurse (CCRN) Practice Exam

During which test would a patient be observed for the downward drifting of arms?

1. Romberg Test

2. Pronator Drift Test

3. Cerebellar Function Tests

4. Decerebrate Posturing Assessment

The correct answer is: Pronator Drift Test

The pronator drift test is specifically designed to assess upper extremity strength and motor function. During this test, the patient is asked to hold both arms straight out in front of them with palms facing upwards. The medical professional then observes for any downward drifting of the arms, which can indicate weakness on one side of the body or issues with coordination. Observing a downward drift of one arm can provide critical information regarding potential neurological deficits, particularly in conditions like stroke or other focal neurological injuries. The other tests listed assess different aspects of neurological function. The Romberg test evaluates balance and proprioception, requiring the patient to stand with feet together and eyes closed. Cerebellar function tests focus on coordination and may include activities like finger-to-nose testing or heel-to-shin movements. Decerebrate posturing assessment is a method of evaluating severe brain injury and involves the observation of arms and legs extending in response to stimuli. Thus, the pronator drift test is unique in its targeted observation of arm movement related to strength and motor control.