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김동수,임상희,김동현,송명호,김형균,최원아,박윤길 대한근전도전기진단의학회 2008 대한근전도 전기진단의학회지 Vol.10 No.2
Objectives: To determine the influence of circadian rhythm on amplitude and latency of SSR (sympathetic skin response) Methods: Thirty healthy adults who have no disease in sympathetic and other nerve systems participated in this study. We recorded the SSR 3 times, in the morning (7:30 am), afternoon (12:30 pm) and evening (5:30 pm). We attached the active electrode on the left palm and reference electrode on the back of the left hand and ground on the left forearm. We stimulated the right median nerve at wrist three times. To avoid habituation, intermission between stimuli were more than 1 min and we measured onset latency and peak to peak amplitude. Results: Average latency of SSR was recorded 1.49±0.12 sec in the morning, 1.48±0.13 sec in the afternoon and 1.46±0.14 sec in the evening. In addition, average amplitudes were recorded 1.97±1.25 mV, 1.68±0.99 mV and 1.61±0.93 mV respectively. The average latency and amplitude were greater in the morning compared to the result in the afternoon and evening, but not statistically significant. There was no significant difference between men and women. Conclusion: Latency of SSR was not affected by the change of circadian rhythm. However, not only amplitude has a tendency to be increased in the morning but also latency has a tendency to be shortened in the evening, which should be considered when analyzing the result of SSR.
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한국산 메기류(진구아강 : 메기목)아홉종의 핵형에 대하여
김동수,박은호,김지식 한국유전학회 1982 Genes & Genomics Vol.4 No.2
The karyotypes of nine species of Korean bagrid and silurid catfishes were examined to obtain karyological information of this group of teleosts. Chromosome morphologies and numbers generally showed high variability from species to species. The presence of microchromosomes in one species of silurids was detected. This is the first finding of microchromosomes in the entire teleostean fishes. In some other species, chromosomes bearing large secondary constrictions with heteromorphism were also found. Karyologic and evolutionary implications of the results are discussed.
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