Masseter silent period: a study of magnetic stimulation.
We employed magnetic stimulation to study the masseter silent period (SP) in 16 healthy volunteers. Cutaneous perception threshold (CPT or 1 T) was determined. SP threshold was 30% M (maximal output) in each subject, equivalent to 1.5-3 T, and as intensity increased, SP durations prolonged. The correlation was higher with units of % M (r = 0.89) than CPT (r = 0.39). The recommended intensity was 60% M because of least variation of SP durations. Conclusively, magnetic stimulation is a new and painless method to study masseter SP. CPT is less effective in studying masseter SP with magnetic stimulation as the input effectiveness correlates best with % M rather than CPT.
Lin
Y Y
YY
Neurological Institute, Veterans General Hospital-Taipei, Peitou, Taiwan.
Liao
K K
KK
Wang
S J
SJ
Tang
S
S
Tsai
C P
CP
Wu
Z A
ZA
D000328:Adult; D000704:Analysis of Variance; D004576:Electromyography; D005260:Female; D006801:Humans; D008280:Magnetics; D008297:Male; D008406:Masseter Muscle / Q000502:physiology*; D008875:Middle Aged; D010465:Perception / Q000502:physiology; D011930:Reaction Time / Q000502:physiology