Nerve
Radial
Ulnar
Median
Dermatomes to Remember
Sensory Distribution
Thumb
Middle finger
Pinky
Nipple
Umbilicus
Big toe
Sole of foot
Peripheral Nerves to Remember
Sensory Distribution
Dorsum of hand
Pinky side of hand
Pajm of hand
Lateral femoral cutaneous
Peroneal
Lateral aspect of thigh
Lateral aspect of leg and dorsum of foot
If spinal cord compression is suspected, be certain to check for a sensory
level on the trunk. Perianal sensation is important to check in patients with suspected
cauda equina lesions.
2 1 2 • Neurology
Dissociated sensory loss, i . e . , loss of pain and temperature on