Final answer:
The Cervical Distraction test is used to diagnose cervical radiculopathy. Pain relief during the test suggests nerve root compression, while increased pain indicates other cervical pathologies or muscle strain.
Step-by-step explanation:
The Cervical Distraction test is a clinical examination procedure used to evaluate for the presence of cervical radiculopathy. During the test, the examiner applies a gentle upward force under the patient's chin and at the base of the occiput to 'distract', or slightly separate, the cervical vertebrae. If symptoms are alleviated or diminished, such as a decrease in radicular pain, this may indicate nerve root compression. Conversely, if the symptoms of pain increase, this may suggest muscle strain or cervical spine pathology not related to nerve root compression. Cervical dystonia, where individuals experience involuntary muscle contractions leading to abnormal movements and postures, such as in Nasir's case, might also be exacerbated during this test, depending on the severity and the nature of the condition.