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Spurling’s maneuver and modified Spurling’s maneuver aka neck compression test.
This maneuver is highly specific for the presence of cervical root compression
Can be used to reproduce radicular pain/symptoms.
Perform this maneuver with caution as it should not be performed in patients who have potential cervical spine instability.
Keeping the patient’s head in a neutral position pressing down on the top of the head. If this fails to reproduce the patient's pain, the test is repeated with the head extended, rotated and tilted to the affected side (the modified Spurling’s maneuver).
Reproduction of symptoms (limb pain or paresthesias) beyond the shoulder is considered positive. Neck pain alone is nonspecific and constitutes a negative test.
The test has a high specificity (0.89 to 1.00) but low sensitivity (0.38 to 0.97).
Meaning a positive test is helpful but a negative test does not rule out radicular pain.
This test should be used in conjunction with a thorough history and physical examination (strength, sensation and reflex testing)
https://www.youtube.com/watch?v=17QWqbXjSpc
References
Thoomes, Spine J 2018 Value of physical tests in diagnosing cervical radiculopathy: a systematic review.