What are the key neurologic signs of cervical and lumbar radiculopathy, and how do they differ?

Cervical and lumbar radiculopathy present with muscle weakness, decreased reflexes, and dermatomal sensory deficits corresponding to the affected nerve root. Key diagnostic features include pain radiating along the nerve distribution and positive Spurling's test for cervical radiculopathy. Clinical pearls include recognizing that lumbar radiculopathy may mimic peripheral neuropathy, and cervical radiculopathy can be confused with shoulder pathology. A common pitfall is overlooking non-dermatomal pain patterns, which may suggest a more complex pathology.