[Detection of the bioelectric activity of respiratory musculature in clinically healthy persons of various ages].
We studied the amplitude of the integrated electromyogram of three sets of muscles, which have an active part in the respiratory movements, for senile changes. Bipolar 50-mm2 electrodes with an interelectrode spacing of 20 mm were used to produce the electromyograms. A "Mediator" electromyograph equipped with an amplitude and frequency analyzer and synchronized to a "Medikor" spirograph was used. The electrodes were placed at precisely determined locations. 164 clinically healthy persons, 85 men and 79 women, aged between 18 to 89 years, were included in the study. The amplitude of the pectoral muscles decreases significantly in case of accelerated exspiration. The amplitude of cervical muscles increases in case of women respirating regularly, whereas that of the abdominal muscles decreases significantly in case of deep respiration and accelerated exspiration. This applies to women only for accelerated inspiration. The amplitude response to a number of respiratory movements is lower in old age, particularly in women.
D000009:Abdominal Muscles / Q000502:physiology; D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D004576:Electromyography; D005260:Female; D006801:Humans; D007366:Intercostal Muscles / Q000502:physiology; D008176:Lung Volume Measurements; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000502:physiology*; D009334:Neck Muscles / Q000502:physiology; D012119:Respiration
Die Erfassung der bioelektrischen Aktivität der Atemmuskulatur bei klinisch gesunden Personen unterschiedlichen Alters.