2024-03-29T13:02:58Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00020938
2022-12-15T03:51:34Z
453:456
471:537:538:1173
正中神経刺激による中潜時体性感覚誘発電位の研究 : 刺激条件(刺激強度, 刺激頻度)の影響について
正中神経刺激による中潜時体性感覚誘発電位の研究 : 刺激条件(刺激強度, 刺激頻度)の影響について
Effect of Stimulus Intensity and Stimulus Rate on Middle-latency Somatosensory Evoked Potentials after Median Nerve Stimulation in Man
本田, 吉穂
evoked potential
somatosensory evoked potential
middle latency
stimulus rate
stimulus intensity
誘発電位
体性感覚誘発電位
中潜時
刺激頻度
刺激強度
Effect of the stimulus intensity and the stimulus rate on middle-latency somatosensory evoked potentials (SEP) was studied in details. These were recorded over the parietal and central scalp after median nerve stimulation. The amplitude of N32 and N60 recorded from the central scalp became maximum between 2.5 and 3 times sensory threshold. N20 recorded from the parietal scalp saturated at 3.5 times sensory threrhold. The median nerve action potential recorded at the elbow required 4 times sensory threshold for its saturation. These findings suggests that N32 and N60 (middle-latency SEP) have more effective central nervous amplifying system than N20 (short-latency SEP). When the stimulus rate decreased from 6.1Hz to 0.1Hz, we observed the amplitude of the N60 potential increased gradually and that N32 became two distinct peaks. These two peaks, N32a and N32b, could be clearly observed by the zero-phase-shift digital filtering. These findings suggest that N32 and N60 are composites of multiple waves similar to FFP (fast frequency potentials), identified as several small wavelets over the ascending and descending phases of the major negative wave of N20. These findings are compatible with the presence of polysynaptic network.
新潟医学会
1992-06
jpn
departmental bulletin paper
http://hdl.handle.net/10191/39778
https://niigata-u.repo.nii.ac.jp/records/20938
AN00182415
00290440
新潟医学会雑誌
新潟医学会雑誌
106
6
555
562
https://niigata-u.repo.nii.ac.jp/record/20938/files/106(06)_555-562.pdf
application/pdf
1.7 MB
2019-08-16