Comparison of ERP Patterns by Suction and Puff Stimulus = Comparison of ERP Patterns by Suction and Puff Stimulus

다국어 초록 (Multilingual Abstract)

The aim of this study was to compare event-related potential (ERP) patterns activated somatosensory area (C3) and motor area (FC5) about suction and puff stimulus by applying these stimuli to the fingers. Twelve healthy right-handed men (mean age = 23.1 ± 2.0 years) participated in the study. One session consisted of a Rest Phase (9sec) and a Suction or Puff Phase (3sec). During the Rest Phase, the subjects were instructed to relax and get a ready without any stimulus being applied. During the Suction or Puff Phase, suction or puff stimulus of same intensity (4 psi) was applied to the first joint of the right index finger. Subjects performed 1 session (30 trials) for each suction and puff stimulus. 1 session is repeated twice. After completion of the session, a subjective magnitude test was presented. We extracted the maximum positive amplitude, minimum negative amplitude and relevant latency values from ERP signals from C3 and FC5. Suction and puff stimuli had similar subjective magnitude scores. For C3, the maximum positive latency (suction: 82ms, puff: 100ms) (p = .001) and minimum negative amplitude latency (suction: 167ms, puff: 188ms) (p<.001) was appeared earlier for the suction stimulus than for the puff stimulus. For FC5, the maximum positive latency (suction: 81ms, puff: 90ms) (p = .013) and minimum negative amplitude latency (suction: 168ms, puff: 186ms) (p = .010) was appeared earlier for the suction stimulus than for the puff stimulus. The suction stimulus caused a more sensitivity in the somatosensory area (C3) and motor area (FC5) than did the puff stimulus during suction and puff stimuli of the same intensity.