OBJECTIVE: (1) to develop a method for masseteric repetitive nerve stimulation (RNS) and to obtain normative data for amplitude and area decrement of the muscle (M) response. (2) To investigate @entity1737 ( @entity1737 ) @entity1 with masseteric RNS. Masticatory muscles are frequently affected in @entity1737 , but no RNS test is available to investigate this district. METHODS: Fifteen healthy subjects and 17 @entity1737 @entity1 were examined. The masseteric nerve was stimulated by a monopolar needle (cathode), inserted between the mandibular incisure and the zygomatic arch, and a surface electrode (anode), on the contralateral cheek. Masseteric M response was recorded using surface electrodes on the muscle belly and below the mandibular angle. Stimuli were delivered at 3 Hz in trains of 9, at rest and after isometric effort. RESULTS: Normal subjects: mean amplitude decrement was 0.3+/-1.2% at rest, and 1.9+/-1.3% after isometric effort. @entity1 : 15 @entity1 (88%) were positive on masseteric RNS; in 3 of these it was the only positive RNS test. The extent of decrement observed in masseter muscle was significantly greater than in trapezius muscle. CONCLUSIONS: Masseteric RNS is a simple and well-tolerated procedure; it offers a new possibility in testing the cranial muscles in disorders of neuromuscular transmission.

Masseteric repetitive nerve stimulation in the diagnosis of XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'PATIENTS'] @entity1737 :: ('MESH:D009157', 'Disease') :: ['MG', 'myasthenia gravis']
@entity1737 :: (MESH:D009157,Disease) :: ['myasthenia gravis']
