Une application de l'analyse spectrale dans le traitement des signaux electrosplanchnographiques

Tonković, Stanko; Penaud, J; Thouvenot, J; Mountafian, J. P.

doi:10.1007/bf02477738

Cited by 2 publications

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“…Par ailleurs, I'electrophysiologie par derivations externes, ou Clectrosplanchnographie (THOWENOT et al, 1968(THOWENOT et al, & 1973, utilisant des constantes de temps longues, permit d'individualiser toute une skrie d'activitks lentes abdominales, et d'attribuer, par analyse spectrale (BROWN et al, 1975;TONKOVIC et al, 1975)' au cblon, la gamme de frkquence de 0 a 2 c/min, et de la sCparer nettement de celle de l'estomac qui est de 2.5 A 4.1 c/min. Devant la complexitk des rksultats obtenus actuellement, le problkme de la part respective des differents rythmes lents et rapides, ainsi que leur origine circulaire ou longitudinale, se pose.…”

Section: Introductionunclassified

Relations entre les activitiés électriques du taenia coli et des fibres circulaires. Étude sur le côlon transverse chez l'homme

Giorgio

Abbattista

Tritto

et al. 1987

Archives Internationales de Physiologie et de Biochimie

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First results of the comparison between the electrical activity of taenia coli and circular muscle are described. Experimental techniques consisted in recording electrical activity for 83 h in 12 patients during the post-operative period after cholecystectomy. Bipolar wire electrodes were surgically inserted in each muscle of the transverse colon's median portion. Statistical treatment leads to the principal conclusion as follows: Whatever type of muscles we have investigated, always could be found slow rhythmic components (called electro-control activity, ECA) in frequency ranges of 1-5 c/min and 9-12 c/min. Major part of taenia coli ECA is in frequency range between 1-5 c/min. ECA in this frequency range can be found in 21% of circular ECA, 23% of taenia coli ECA and 9% of common ECA (% means percents of total recording time). Higher frequencies are found in 7% of circular ECA, 4% of taenia coli ECA and 3% of common ECA. Using long time constant (more than 2 s) the bursts of spikes (10-50 microV) meaning active responses are always accompanied with slower components of important amplitude (greater than or equal to 100 microV): In the discrete mode of activity (DERA) short bursts (during 1-2.5 s) always follow the ECA, whereas in the continuous mode of activity (CERA) mostly longlasting bursts (up to 30 s) could be found. The bursts represent 14% of total time, namely in 8% of longitudinal ECA, 4% of circular ECA and 2% of common ECA. ECA of taenia coli in the case of common ECA is always prolonged. Typical slow waves of greater amplitude (greater than or equal to 500 microV) different from ECA are frequently recorded probably due the intensive contractile process.

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Section: Introductionunclassified