An Active Self-Driven Piezoelectric Sensor Enabling Real-Time Respiration Monitoring

In this work, we report an active respiration monitoring sensor based on a piezoelectric-transducer-gated thin-film transistor (PTGTFT) aiming to measure respiration-induced dynamic force in real time with high sensitivity and robustness. It differs from passive piezoelectric sensors in that the piezoelectric transducer signal is rectified and amplified by the PTGTFT. Thus, a detailed and easy-to-analyze respiration rhythm waveform can be collected with a sufficient time resolution. The respiration rate, three phases of respiration cycle, as well as phase patterns can be further extracted for prognosis and caution of potential apnea and other respiratory abnormalities, making the PTGTFT a great promise for application in long-term real-time respiration monitoring.

The features of blood supply to the rat medulla during pathological periodic apneustic respiration provoked by sodium hydroxybutyrate

В острых опытах на наркотизированных самцах беспородных белых крыс изучали кровоснабжение ствола головного мозга в зоне дыхательного центра при моделировании периодического апнейстического дыхания с помощью оксибутирата натрия. При формировании периодического патологического дыхания в микрососудах ствола мозга возникают характерные периодические колебания кровотока и оксигенации нервной ткани, которые соответствуют дыхательным движениям. Кроме того, в этих условиях увеличивается кровенаполнение и величина венозного оттока крови от мозга. Полученные данные позволяют предположить, что характерные колебания кровоснабжения мозга в ритме дыхательных движений появляются не только в стволе мозга, но и в других отделах. Они, вероятно, связаны с пульсациями венозного оттока вследствие присасывающего влияния грудной полости во время инспирации. The model of periodic apneustic respiration provoked by sodium hydroxybutyrate was used in acute experiments on anaesthetized mongrel male albino rats to examine the blood supply to the region of respiratory center in the brain stem. The development of periodic pathological respiration was associated with specific periodic oscillations of 1) blood flow in the brain stem microvasculature and 2) oxygenation of the nervous tissue following the respiration rhythm. Under these conditions, both blood supply to and venous outflow from the brain were augmented. The study suggested that the characteristic oscillations of blood supply to the brain at the respiration rhythm emerge not only in the brain stem but also in other cerebral regions. Probably, they are caused by oscillations of venous outflow induced by the suction effect of the chest cavity during inspiration.

NEUROCARDIAC-CARDIORESPIRATORY INTERACTION OF HEART-BRAIN MAILUNS SYNCHRONY AT DEEP ZEN MEDITATION

Innovatively new behaviors of heart rate variability caused by special heart-transition process were observed in the long-term, well-experienced Zen practitioners while practicing the heart-to-heart imprint sealing (HHIS) Zen meditation. HHIS Zen practice involves specific neurocardiac-cardiorespiratory interaction while on the way of realizing the heart-dominant, detached brain. Results of analyzing the electrocardiogram and respiratory signals of 10 experienced practitioners reveal several distinctive characteristics: (1) remarkably linear correlation between standard deviation of the normal R-to-R intervals, SDNN, and total power in very-low-frequency (VLF, 0.0033–0.04[Formula: see text]Hz) band of power spectrum of the heart-rate sequence, (2) time-varying VLF power dominating over the low-frequency and high-frequency power in heart rate variability (HRV) variations, (3) intermittent transition into slowly, deeply abdominal respiration inducing a boost of heart rates, (4) heart-rate baseline slowly fluctuating at 0.005–0.0067[Formula: see text]Hz, about 1.5–2 cycles in 5-min period, and (5) remarkable respiratory sinus arrhythmia (RSA) synchrony between heart rate and respiration rhythm. This paper proposes a rational scientific hypothesis for the neurocardiac-cardiorespiratory mechanism. The unique scheme of HHIS Zen meditation involves the spiritual-qi concentration and refinement for pinpointing into the particular energy centers, mailuns. Ignition by a subtle, deepest abdominal respiration, electrical impulses rapidly transmit from solar plexus to branchial plexuses to activate unique heart-transition process. Simultaneously, another branch streams upward the spinal cord to cervical plexus and brainstem that effectively harmonizes neurocardiac interactions. To investigate the underlying behaviors, time-domain and frequency-domain HRV based on continuous wavelet transform were employed.

IMPORTANCE OF RELATIONSHIP BETWEEN MOVEMENT RHYTHM AND RESPIRATION IN PHYSICAL EDUCATION AND IN TOP-LEVEL SPORT

The existence of a human body is conditioned by: food, sleep, respiration. Without air man can live approximately 4 minutes. A longer break in access of oxygen to the brain results in irreversible changes of its functioning. Majority of adultscannot breathe economically and rhythmically. If respiration has such importance for the normal life of a man it shouldconstitute a significant part of educational system. Only in few national cultures, including Asia (e.g. in Japan andChina) the ability to breathe was made into an art. There, this art is subject to special care throughout many years of life of a person and is an essential component of mental hygiene. Respiration has particular importance while practicing physical exercise. The correct combination of respiration rhythm and movement is a prerequisite to remain healthy and to keep the ability to work, as well as to achieve high results in sport. Scarce information about this important issue could be found in some handbooks concerning health maintenance, but they were not found in the theory of: movement teaching, recreation, anthropokinesiology. It was a little number of papers publish about this very important problem [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]. The issue of rational respiration was the subject of particular interest of scientists several years ago, but recently it has become only marginal. Consequently, the aim of this paper was to: 1. Study the literature connected with respiration and movement rhythm. 2. To define which phase of respiration: expiration or inspiration is more important in different sport exercises. 3. Elaboration a classification of kind respiration phase and different sports. 4. Methods for creating the art of rational respiration. 5. Relation of rational respiration rhythm to endurance.