What conditions can an F-wave be useful?   Typically, F-waves are used to assist in evaluating for guillain-barre, lumbar spinal stenosis, and early peripheral polyneuropathy.

Is there a treatment for Issac's syndrome?   The only treatment that exists for Issac's syndrome is symptom management.  Anticonvulsants can be used to help with stiffness and muscle spasms.

How about in the lower extremities?   H-reflexes are typically used to evaluate S1 radiculopathies in the lower extremities.