关键词： Current Activity  

摘要： This article reviews results on a learning theory that can be derived from simple psychological postulates and given a suggestive neurophysiological, anatomical, and biochemical interpretation. The neural networks described can discriminate, learn, simultaneously remember, and perform individually upon demand any number of space-time patterns of essentially arbitrary complexity. A general theorem expressing this fact is stated in the language of nonlinear functional-differential systems. Applications of the theory to various empirical problems are mentioned; e.g., serial learning, stimulus sampling, lateral inhibition, energy–entropy dependence, reaction time, transmitter production and release, spatiotemporal masking, operant and respondant conditioning, influences of under- or over-arousal on learning. © 1971 Taylor & Francis Group, LLC.

摘要： The solution of a partial differential equation obtained by Lorente de No in his recent studies on the longitudinal polarization of the core of nerve fibers is presented. In particular, for the limiting steady state and in the absence of longitudinal polarization, both the equation and his solution reduce to known expressions. © 1970.

关键词： Science   Humanities and Social Sciences   multidisciplinary  

摘要： SUMMARY: Modern methods for electrical recording from the central nervous system of man go beyond the routine use of the scalp electroencephalogram (EEG).Evoked responses to sensory input can be used to investigate the subjective complaint of sensory deficit (for example, numbness, deafness).Much can be learned from sleep studies during which scalp EEG, neck electromyogram (EMG), extraocular movements, and EKG are monitored. These studies help to define sleep disturbances (for example, insomnia) and abnormalities in central nervous system (CNS) maturation (as in autistic children).In certain patients with significant neurological or psychiatric disease the routine scalp EEG may well be normal, whereas chronically implanted subcortical macroelectrodes show marked localized seizure activity. Both subcortical EEG and cellular discharges (units) can be monitored in patients with chronically implanted microelectrodes. This method permits exact localization and computer analysis of changes in cell *** these data (EEG, units, EMG, EKG, and so forth) can now be telemetered and, if necessary, transmitted long-distance by telephone line. This makes it possible to record from an unrestrained, freely moving subject in his natural environment, at home or at work.

摘要： Thomas Laycock, unwelcome professor at the University of Edinburgh, was born at Witherly, Yorkshire, into a Wesleyan clergyman's family. Educated at the Wesleyan Academy and the University College of London, he subsequently studied medicine under Louis, Lisfranc, and Velpeau in Paris, and served three years as the resident medical officer of York County Hospital before receiving the MD degree summa cum laude from Göttingen in 1839.1 Returning to practice in York, he acquired a reputation as a skillful physician; in time, he was appointed physician to the York Dispensary and lecturer in medicine in the York Medical School. In 1855, when the chair of medicine at Edinburgh became vacant, his fame as a profound thinker, medical scientist, and a prolific writer added significant support to his candidacy. Eight contestants engaged in a bitter struggle for the post, and, in spite of his selection by the Edinburgh Town Council, he was

关键词： Pulse Train   Relaxation Oscillator   Emitter Follower   Silicon Control Rectifier   Frequency Translation