抄録
Backgroud & objects: EGGs were recorded before and during MDT in order to study the stress effects on EGG. Methods: EGGs(τ=5 sec, high cut=0.5 Hz) were recorded from 16 locations on thoraco-abdominal surface. EGG spectral groups were classified into 5 ones, 1cpm ones (0-2.4 cpm), 3 (2.5-4.9), 6 (5.0-7.4), 8 (7.5-9.9) and 10 (10.0-12.9). Peak power ratio(MDT/rest) of epigastric(ch3-6), supraumbilical(ch7-9) and infraumbilical region(ch12-14) was calculated. Anxiety and depression scores were obtained from HADS(after Zigmond & Snaith). Informed consent was obtained from the subjects(n=43) Results: Respiratory frequency and heart rate at rest significantly increased during MDT. The MDT stress induced dual excitatory(MDT/rest>1.0) or inhibitory effects(MDT/rest<1) on EGG. The mean frequencies of the inhibitory groups at rest were significantly higher than those of the excitatory ones and they became lower during MDT. Those of the excitatory ones at rest were significantly lower than those of the inhibitory ones and they became higher during MDT. Anxiety or depression scores of the excitatory groups were significantly higher than those of the inhibitory ones in epigastric 6 and 10 cpm, supraumbilical 6 cpm and infraumbilical 1, 3 and 6 cpm groups. The LF/HF during MDT of the inhibitory group was significantly higher than that of the excitatory one just in infraumbilical 3 cpm group. Discussion & conclusion: Anxiety, depression and LF/HF seemed to have some relationships to MDT stress responses of EGG. [Jpn J Physiol 55 Suppl:S113 (2005)]
