After exercise, the breathing pattern initially follows the duodenal “pace signal”

Published: 04-02-2019| Version 1 | DOI: 10.17632/8t8jrsf7zx.1
Fletcher Kovich


This is a supplemental experiment to the paper in the following link. It demonstrates that, after exercise, when the subject was relaxing while his respiration slowed down, his respiration rate initially followed the speed of the duodenal "pace signal", then the subject sighed and his respiration rate then immediately fell to near to the normal base level.


Steps to reproduce

The impedance was recorded in a band across the subject's right arm, perpendicular to the acupoint Lung-6, with the electrodes placed 6 mm apart. A thermistor was also placed under the subject’s nose to monitor the breath at his nostril. At each acupoint, a pair of custom-made electrodes were used, set at a distance of 6 mm apart, and a standard ECG electrode was attached at 4-10 cm from each acupoint, as an earth. Gel was used on each electrode. A 40 kHz 200 mv sine wave was passed through the electrodes, and the voltage monitored. A custom-made unit converted the monitored voltages to DC, then passed these to a data logger which sampled the voltages at 1 kHz. The thermistor was attached to a simple voltage divider circuit and a dc current passed through it. The voltage across the thermistor was monitored by another data logger, also sampling at 1 kHz. An Access database and macro was used to control the data loggers and convert the voltage samples into kΩ and Celsius values, before they were imported into Matlab and filtered to produce the plots. Full details of all the techniques and equipment used (including how to reliably locate acupoints electrically) can be found in the following documents. The subject was a male, aged 34. In Chinese medicine terms, he suffered poor stomach and pancreas function (usually known as “Stomach chi deficiency” and “Spleen chi deficiency”); and also poor “kidney” function (known as “Kidney chi deficiency”).