This title in the popular Pearls Series focuses on electrodiagnostic studies of neuromuscular diseases. EMGs and their interpretation are a major component of the specialty of physical medicine and rehab physicians, and they are important to neurologists and electromyographers. For each case, patient information is presented, the EMG findings are discussed, and the reader is asked to make a diagnosis based on these findings. The next page reveals the diagnosis, discussed the case and the medical condition in question, and then presents 3-4 pearls of practice distilled from the case.