Which finding would support radiculopathy as the diagnosis?

• A. Dermatomal pattern of weakness and sensory loss with reflex changes
• B. Normal reflexes with isolated nerve distribution weakness
• C. Distal symmetric weakness with preserved dermatomes
• D. Non-dermatomal patchy sensory loss

Answer: (A)

When radiculopathy is present, the weakness and sensory loss follow a single dermatomal pattern and are accompanied by changes in reflexes at the involved root level. This happens because a compressed or irritated nerve root affects all the fibers that exit at that specific root, so you see sensory loss in the skin area served by that dermatome and weakness in the muscles supplied by the same myotome, with reflexes that are diminished or absent for that root. This combination—dermatomal sensory loss, myotomal weakness, and corresponding reflex changes—points to a root-level issue rather than a problem confined to a peripheral nerve or to a generalized neuromuscular process. In contrast, normal reflexes with weakness confined to a peripheral nerve distribution would suggest a mononeuropathy, distal symmetric weakness with preserved dermatomes points away from a root, and non-dermatomal patchy sensory loss suggests a non-radicular or multifocal process rather than radiculopathy.