Sympathetic nervous system
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The conference program will consist of plenary lectures, symposia, workshops andinvitedsessions of the latest significant findings and developments in all the major fields ofbiomedical engineering.Submitted papers will be peer reviewed. Accepted high quality paperswill be presented in oral and postersessions, will appear in the Conference Proceedings and willbe indexed in PubMed/MEDLINE & IEEE Xplore
2019 IEEE International Conference on Systems, Man, and Cybernetics (SMC2019) will be held in the south of Europe in Bari, one of the most beautiful and historical cities in Italy. The Bari region’s nickname is “Little California” for its nice weather and Bari's cuisine is one of Italian most traditional , based of local seafood and olive oil. SMC2019 is the flagship conference of the IEEE Systems, Man, and Cybernetics Society. It provides an international forum for researchers and practitioners to report up-to-the-minute innovations and developments, summarize stateof-the-art, and exchange ideas and advances in all aspects of systems science and engineering, human machine systems and cybernetics. Advances have importance in the creation of intelligent environments involving technologies interacting with humans to provide an enriching experience, and thereby improve quality of life.
The IEEE Sensors Conference is a forum for presentation, discussion, and exchange of state-of-the art information including the latest research and development in sensors and their related fields. It brings together researchers, developers, and practitioners from diverse fields including international scientists and engineers from academia, research institutes, and companies to present and discuss the latest results in the general field of sensors.
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IEEE Healthcom 2018 aims at bringing together interested parties from around the world working in the healthcare field to exchange ideas, discuss innovative and emerging solutions, and develop collaborations.
Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.
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The most highly-cited general interest journal in electrical engineering and computer science, the Proceedings is the best way to stay informed on an exemplary range of topics. This journal also holds the distinction of having the longest useful archival life of any EE or computer related journal in the world! Since 1913, the Proceedings of the IEEE has been the ...
The Field of Interest of the IEEE Sensors Journal is the science and applications of sensing phenomena, including theory, design, and application of devices for sensing and transducing physical, chemical, and biological phenomena. The emphasis is on the electronics, physics, biology, and intelligence aspects of sensors and integrated sensor-actuators. (IEEE Guide for Authors) (The fields of interest of the IEEE ...
2005 IEEE Engineering in Medicine and Biology 27th Annual Conference, 2006
In terms of the characteristic of anesthetic operation, this paper propose new physiologically based pharmacokinetics/ pharmacodynamics (PBPK/PD) model that focus on the important role of autonomic nervous system (ANS) more. Automatic nervous system that is divided into the sympathetic nervous system and the parasympathetic nervous system, at the same time, is the important target of drug effect in anesthesia. Consequently, ...
Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ, 1993
2005 Annual IEEE India Conference - Indicon, 2005
Heart Rate Variability (HRV) is a marker of sympathovagal balance of Autonomous Nervous System (ANS). The homeostasis of the cardiovascular system is properly maintained by the efficient interaction of parasympathetic and sympathetic nervous systems. The efficiency of such interactions is understood from the computations of the ratio of the sympathetic to parasympathetic spectral powers. This paper introduces a modified Principal ...
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991, 1991
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286), 1998
Power spectral analysis (PSA) of heart rate variability (HRV) is being used to assess autonomic function. We have examined the effect on HRV-PSA of subarachnoid block (SAB) and acute selective block of the vagus (parasympathetic) by intravenous atropine. Six patients, aged 64-83 years, received SAB. Atropine (0.6 mg) was given after 30 minutes. Using the electrocardiogram signal, PSA was performed ...
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In terms of the characteristic of anesthetic operation, this paper propose new physiologically based pharmacokinetics/ pharmacodynamics (PBPK/PD) model that focus on the important role of autonomic nervous system (ANS) more. Automatic nervous system that is divided into the sympathetic nervous system and the parasympathetic nervous system, at the same time, is the important target of drug effect in anesthesia. Consequently, not only does the action levels of automatic nervous system indicator the anesthesia state, but feed back altering the physiological state parameters of pharmacokinetics, which being one crucial reason of time-variant and nonlinear drug effect. However, the recent PBPK modeling and simulation strategy only estimate specific absorption, distribution, metabolism and excretion (ADME) parameters but consider no modulation result of automatic nervous system any longer. So far, in order to avoid over-interpreted data from mathematical models and to take more consideration of clinical significance, the PBPK/PD model with automatic nervous system presented is helpful to make clearer relationship between PK and PD, that between sophisticated of model and real physiological phenomenon in anesthesia than before
Heart Rate Variability (HRV) is a marker of sympathovagal balance of Autonomous Nervous System (ANS). The homeostasis of the cardiovascular system is properly maintained by the efficient interaction of parasympathetic and sympathetic nervous systems. The efficiency of such interactions is understood from the computations of the ratio of the sympathetic to parasympathetic spectral powers. This paper introduces a modified Principal Dynamic fluctuation analysis (PDFA) using a non-linear kernel trick to estimate the dynamics of cardiac autonomic nervous systems activity from the heart rate variability. It is found that the wide range of beating ratio has better sympathovagal balance. A large LF/HF ratio suggests predominantly vagal conrol. Comparison of this method to the conventional linear methods shows PDFA provide more accurate assessment of the sympathovagal balance. We obtained consistent results in all of our signals, comprising of seven sudden death cardiac signals and five normal sinus rhythm signals.
Power spectral analysis (PSA) of heart rate variability (HRV) is being used to assess autonomic function. We have examined the effect on HRV-PSA of subarachnoid block (SAB) and acute selective block of the vagus (parasympathetic) by intravenous atropine. Six patients, aged 64-83 years, received SAB. Atropine (0.6 mg) was given after 30 minutes. Using the electrocardiogram signal, PSA was performed on 512 R-R intervals using an autoregressive model (500 points), which was displayed on-line. HRV data was collected at baseline, during SAB and after atropine. Spectral densities were calculated for two frequency bands, low (0.04-0.15 Hz) and high (0.15-0.40 Hz), and comparisons made using paired t-tests. Heart rate decreased by 13 (5-20) b.p.m. following SAB and increased by 16 (10-24) b.p.m. After atropine. Low band frequencies increased by 236(128)% following SAB and then decreased to 39(48)% after atropine. Similarly, high band frequencies increased by 549(322)% and then decreased to 14(13)%. (all P<0.05). Following SAB, spectral activity increased (high band>low band). These increases appeared vagal as they were greatly reduced by atropine.
The purpose of this paper is to analyse heart rate variability of a navigator at departure or arrival by the wavelet transform and we tackle the difference between an actual ship and ship's bridge simulator by utilizing a physiological index of heart rate variability. SNS (sympathetic nervous system) and PNS (parasympathetic nervous system) is calculated by using the frequency component range. Because we think that the influence of the mental burden of the navigator is not clear yet in each case, in other words, the kind or strength of their mental burden is not clear and also training of ship or navigational instrument handling by simulator does very well, we need to know the effect from the standpoint of human sensation. So we propose a method of finding an index of assessment of the mental burden by using a ratio of SNS to average of SNS among departure or arrival. The results show that this index was effective.
The objective of this study was to investigate the effect of clothing pressure exerted by the girdles on female's autonomic nervous system (ANS) activity. Three different styles of girdles were tried by seven healthy females. Skin pressures of 6 different positions were measured. The ANS activities were assessed by means of heart rate variability power spectral analysis. Results showed that style Z had the least effect on the ANS activity, because the ratio of low frequency (LF) to high frequency (HF) had nearly no change. Sympathetic nervous system (SNS) was more excited with style U, because the values of LF, total power, standardized LF (LFnorm) and the ratio of LF to HF (LF/HF) were all inclined to increase. SNS was more inhibited with size L of style Y, because the values of HF, LF, LFnorm and LF/HF were all tended to decline. For size XL of style Y, The local skin pressure was the highest at the lateral waist, which probably made SNS be stimulated. Therefore, size L of style Y had a more negative physiological effect on the women's health, but style U and size XL of style Y had a beneficial physiological effect on the female's health due to activation of SNS. In conclusion, magnitude and gradients of local skin pressures caused by the girdles could influence ANS activity. If the local skin pressure was significantly higher at the abdomen than at any other parts covered by girdles, SNS activity would be inhibited. If the local skin pressure was significantly higher at the lateral waist than at any other parts covered by girdles, SNS activity would be stimulated.
Usage of a ship handling simulator extend to many topics such as crew trains, evaluation of nautical instrument and research of human factor etc. In any case, it is necessary to observe operator's behavior at bridge work. The procedures of performed operator's task could be recorded by a monitoring video camera. However, it is difficult to estimate operator's mental workload at each performance from the monitoring video. In this paper, practical technique is introduced for presuming navigator's mental workload in ship handling simulator by using data of navigator's nasal temperature which is measured by thermal image video camera. And effectiveness of this technique is examined by some practical simulations.
This work introduces a modified principal dynamic modes (PDM) method, which for the first time is able to separate the dynamics of sympathetic and parasympathetic nervous activities. The minimum set of expansion basis functions, which is required to achieve a given mean-square approximation, is termed PDMs of the nonlinear system. We found that the first two dominant PDMs have similar frequency characteristics for parasympathetic and sympathetic activities. Validation of the purported separation of parasympathetic and sympathetic activities was performed by the application of the autonomic nervous system blocking drugs atropine and propranolol. These results are consistent for all nine of our healthy human subjects using our modified PDM approach in both of the conditions of single blockade and double blockade. Comparison of our method to the conventional low/high frequency ratio. shows that our proposed approach provides more accurate assessment of the autonomic nervous balance.
On entering and leaving ports, a captain needs so many operations of a rudder and engine control, that he/she gives orders for bridge teammates. Moreover, a ship's course control is difficult at a low speed as it is easily affected by wind and current. On entering/leaving port, the cooperation among bridge teammates is most important for safe navigation, and its importance is common knowledge in the world. However, its evaluation depends on a seafarer's experience, not a quantitative index. We need an evaluation method of teamwork and relations among teammates with the quantitative index in order to evaluate Bridge Team Management (BTM for short). The purpose of this paper is to evaluate the mental workload of bridge team (BT for short) on entering and leaving ports with heart rate variability. The experiment is carried out at three ports in Japan. The bridge teammates are a Captain, a Deck officer and a Quartermaster. We calculate the SNS value (LF/HF) with frequency components of R-R intervals, and we use Projective Strain Ratio (PSR for short) value to make a base for each teammate. LF is 0.04 to 0.15 Hz and HF is 0.15 to 0.40 Hz. LF is reflected by the sympathetic nervous system and parasympathetic nervous system and H-F is reflected by the parasympathetic nervous system. This index is used to evaluate the mental workload of a car driver on transportation system. As the results, we show three points on BT evaluation. (1) The evaluation of bridge teammates' mental workload is possible with the SNS (PSR) value. (2) The mental workload is shared among BT-mates when the captain makes a decision to change course, and the deck officer and the quartermaster receive his/her orders. (3) The evaluation of mental workload of BT is possible with the SNS (PSR) value.
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