Testing the gate-control theory of pain in man.
نویسندگان
چکیده
According to the gate-control theory of pain, the electrical stimulation of large nerve fibres should stop the pain induced when only C fibres are active. This kind of pain was induced by pressure, repeated pinprick, cold and heat in the ischaemic limb. The peripheral nerves were electrically stimulated in the same way as is done by patients treating their chronic pain by electrical stimulation. There was no change in the quantity nor the quality of the C fibre pain. In other experiments, electrical stimulation of the peripheral nerves induced no change in pain threshold to a heat stimulus when only C fibres were conducting, nor when the whole spectrum of fibres were conducting. Although many experiments have been reported that are consistent with the gate-control theory, the experiments reported here, and others mentioned, are inconsistent with the theory.
منابع مشابه
Artificial neural networks: applications in pain physiology
Artificial neural networks (ANNs) are intelligent systems that have successfully been used for prediction in different medical fields. In this study, the capability of ANN in predicting body behavior in pain-producing situations is evaluated. A three-layer back-propagation ANN is designed using MATLAB software. The inputs include the magnitude of stimulation in pain fibers, touch fibers and cen...
متن کاملArtificial neural networks: applications in pain physiology
Artificial neural networks (ANNs) are intelligent systems that have successfully been used for prediction in different medical fields. In this study, the capability of ANN in predicting body behavior in pain-producing situations is evaluated. A three-layer back-propagation ANN is designed using MATLAB software. The inputs include the magnitude of stimulation in pain fibers, touch fibers and cen...
متن کاملGate Control Theory of Pain
The gate control theory of pain, put forward by Ronald Melzack (a Canadian psychologist) and Patrick David Wall (a British physician) in 1962, and again in 1965, is the idea that the perception of physical pain is not a direct result of activation of nociceptors, but instead is modulated by interaction between different neurons, both pain-transmitting and non-pain-transmitting. The theory asser...
متن کاملImproved Direct Torque Control for Induction Machine Drives Based on Fuzzy Sector Theory
Here, a new fuzzy direct torque control algorithm for induction motors is proposed. As in the classical direct torque control, the inverter gate control signals directly come from the optimum switching voltage vector look-up table, the best voltage space vector selection is a key factor to obtain minimum torque and flux ripples. In the proposed approach, the best voltage space vector is sel...
متن کاملGain Scheduling Waste-gate Control of Turbocharger Using MATLAB & GT-POWER
Turbochargers are used to increase engine manifold air pressure. Control of intake manifold pressure is crucial issue which is done through the speed control of turbocharger, but since it is difficult to directly control the speed of the turbocharger, it is done indirectly through a gate that called the waste gate, which is located in the engine outlet and turbocharger’s turbine inlet. One of t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of neurology, neurosurgery, and psychiatry
دوره 37 12 شماره
صفحات -
تاریخ انتشار 1974