Modern Researches on Qigong

1. The Influence of Qigong on the Neuromuscular SystemWhen the training practice reaches the qigong state, the electroencephalograph dynamic process research finds: the peak frequency under qigong state diminishes in accordance with the variations of time, the dynamic variance falls and the fluctuation of the peak amplitude diminishes. It can be seen that the EEG stability is enhanced and the ordering degree is improved. Meanwhile, the rhythm of the frontal region is strengthened, indicating that the control of the brain over the activities of the internal organs and the incretory glands is somewhat strengthened.Under qigong tranquilization, various components of the body-sensory evoked potential in the experiment display various degrees of restraint, the late components being the most obvious in particular, manifested by descent of wave amplitude or distortion of undulate form. Some components have disappeared. The researchers hold that this is because in the process of qigong, through auto-regulation the reticular structure is made to produce an ascending restraint over the sensory transmission. In addition, in the process of qigong tranquilization the sense perception of electrical stimulation reduces or disappears, denoting that the response to sensational stimulation is reduced.The determination of the skin electrical potential of the acupoints Feishu (Lung Shu, UB13) and Mingmen (Gate of life, Du 4) finds that the skin electrical potential is reduced in the process of the training practice. During the training practice, the Dantian(Elixir Field) and other regions' body surface temperature rises. Meanwhile, it can also be observed that when the training practice reaches the tranquilization state the heart rate slows down, while the volume of the ear lobe blood vessels increases, the two presenting a negative correlation. These discoveries show that qigong dirigation can reduce the excitability of the sympathetic nervous system in the vegetative nerves and raise the excitability of the parasympathetic system.When the training practice has reached the tranquilization state, the relaxation degree of the skeletal muscles is increased and the electromyogram presents single electrical potential pattern or electrical quiescence. Meanwhile, the muscular chronaxy is obviously elongated. 2. The Influence of Qigong on the Respiratory SystemDuring the training practice, the frequency of respiration obviously decreases, the depth of respiration deepens, the pulmonary ventilation volume reduces, tidal volume increases, the carbon dioxide component in the expiratory air and alveolar air increases while the oxygen component reduces. These show that in the process of the training practice respiration is in a spontaneous weakening state.3. The Influence of Qigong on the Digestive SystemQigong dirigation can increase the peristaltic frequency of the stomach and intestines, strengthen their contraction and cause the hyperfunction of the intestinal gurgling sound, promoting the secretion of gastric juice. These effects also indicate that the training practice lays the cerebral cortex in a specific qigong state and regulates the functional condition of the vegetative nerves, manifested as the rise of the excitability of the vagus nerve and the fall of the excitability of the sympathetic nerve, thus regulating the movement and secretory function of the stomach and intestines. Meanwhile, the respiration exercise of qigong is dominated by diaphragmatic movement. The deep and profound abdominal respiration can increase the amplitude of the diaphragmatic movement by 3-4 times, changing the intra-abdominal pressure and promoting the peristalsis of the stomach and intestines.
Source: Modern Researches on Qigong
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