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 ...

[24–27] The clinical decision for a nerve root involvement required a history ... sensory loss in the L5 dermatome, and the muscle power for the hip abduction, ankle dorsiflexion, ankle eversion ...