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Biomedical subjects

M Rodi

Publications and source records attributed to M Rodi.

13 recordsLinked to original sources
PubMed1988

Automatic sleep-wake scoring in the rat on microcomputer APPLE II.

An automatic scoring system in real time of sleep-wake behavior in the rat was elaborated on microcomputer APPLE II. Four electrophysiological recording channels were used to distinguish seven behavioral states. Because the rat shows behavioral stages which are short-lasting, the analysis is performed second by second. It is based on the detection of the signal energy in specific frequency bands. The percentage of time passed in each stage is computed every 15 min, 1 h, 6 h and 24 h, the analysis extending during several days without interruption. The data are also printed out in a listing in real time and histograms in batch mode. Because of the interindividual differences, a calibration is needed. It is performed with a program in batch mode which allows an adjustment of parameters of determination from given specific digitized sequence in each rat. The accuracy of the automatic method was tested by the C contingency test, the theoretical maximal level being at 0.93: the intra- and inter-researchers contingency was 0.89, that between researchers and the computer was 0.85.

Animals↗
PubMed1980

Electroencephalographic recordings during parachute jump sessions.

Electroencephalographic (EEG) recordings of experienced parachutists were done by means of telemetry before, during, and after jumps of up to 3500m. During free-fall and after stabilization, alpha rhythm was recorded from several alpha reactive subjects when they closed their eyes. No pathological EEG recordings were obtained during the different phases of the jump.

Alpha Rhythm↗
PubMedDate not supplied

[Radiotelemetric study of heart rate and electroencephalogram during parachute jumping (author's transl)].

Twelve subjects, experienced parachutists, have been recorded by telemetry before, during and after free-fall parachute jumps. The heart rate showed a statistically significant tachycardia during the different events of the jump (exit, free-fall, opening, open parachute and landing) compared to the baseline before boarding the aircraft. This tachycardia indicates a stress reaction confirmed by a significant increase of adrenalin and noradrenalin in urine. The electroencephalographic invesitgation does not show any adnormalities. Alpha rhythms have been recorded from alpha reactive subjects during free-fall stabilization.

Aviation↗