At the lower end, the 11 lumbar, sacral, and coccygeal dermatomes are often grouped together as the lower extremity dermatomes. A spinal nerve root is a bundle of nerve fibers that branches off ...

From seven of these patients with normal lumbar vertebrae, cremasteric reflexes were adequate on 10 thighs of six patients (table2). The position of the dermatome gap was not different from the ...