Algorithm for Electrodiagnostic Testing of Congenital Facial Weakness. Serial testing of Facial NCS, Limb NCS, NEMG, and possible RNS and SFEMG. (Abbreviations: CN7 – cranial nerve 7, CMAP – compound muscle action potential, NCS – nerve conduction studies, EMG – electromyography, small pp mu – small polyphasic motor unit potentials, RNS – repetitive nerve stimulation, SFEMG – single fiber EMG, HCFP – Hereditary Congenital Facial Paresis, Ryr – Ryanodine)