Proceedings of the IEEE

Issue 6 • June 1968

Filter Results

Displaying Results 1 - 25 of 70
  • [Front cover and table of contents]

    Publication Year: 1968, Page(s): c1
    Request permission for commercial reuse | PDF file iconPDF (798 KB)
    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1968, Page(s):891 - 894
    Request permission for commercial reuse | PDF file iconPDF (391 KB)
    Freely Available from IEEE
  • Specifications for nerve membrane models

    Publication Year: 1968, Page(s):895 - 905
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1280 KB)

    The limitations of models which can generate "action potentials" are discussed and reasons are given for testing all proposed membrane models by comparison with voltage clamp data. Some background information is provided and the voltage clamp methodology reviewed. Many of the membrane electrical characteristics measured by this technique are discussed and some recent observations are given to illu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fluctuation phenomena in nerve membrane

    Publication Year: 1968, Page(s):906 - 916
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1257 KB)

    The fluctuations of the voltage across the resting membrane of myelinated nerve fibers have been analyzed. They show a 1/f spectrum and a Gaussian amplitude distribution and are related to the net flow of potassium through the membrane. When the average membrane voltage is made more negative by means of an external current, depolarizing deflections can be observed. They cause an asymmetry in the n... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Synaptic physiology

    Publication Year: 1968, Page(s):916 - 930
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1622 KB)

    The sequence of events from axon terminal depolarization to integration of information by summation of separate synaptic effects is described. Following depolarization of the terminal, transmitter substance is released probabilistically in integral multiples of a basic quantity, the transmitter unit. The average rate of unit release depends upon membrane potential, ion concentrations (particularly... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Using electronic circuits to model simple neuroelectric interactions

    Publication Year: 1968, Page(s):931 - 949
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1943 KB)

    The Hodgkin-Huxley description of electrically excitable conductances is combined with the Eccles description of synaptic conductances to provide the basis of an electronic model of nerve-cell membrane. The models are used to explore neuroelectric interactions between spatially distributed regions of a single neuron and neuroelectric activities in very small groups of neurons. Among other things, ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The tracing of pathways in the central nervous system

    Publication Year: 1968, Page(s):950 - 959
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4372 KB)

    Fiber connections in the central nervous system are studied both in normal material (especially with the aid of the Golgi technique) and in experimental material. Following an experimentally induced lesion of a nerve fiber or its cell body, the fiber peripheral to the point of the lesion starts to degenerate, a process termed anterograde degeneration. The first morphological sign of degeneration i... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Structuro-functional considerations of the cerebellar neuron network

    Publication Year: 1968, Page(s):960 - 968
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1476 KB)

    The neuronal network of the cerebellar cortex is discussed with strong emphasis upon its structure, but taking into consideration the recently revealed functional properties of its various neuronal elements. From the viewpoint of the experimenter this neuron network has the unique advantage of being arranged in the form of a highly regular rectangular lattice and being built up of relatively few w... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Neural coding in the bullfrog's auditory system a teleological approach

    Publication Year: 1968, Page(s):969 - 980
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2324 KB)

    Anatomical and physiological studies in the peripheral auditory system of the bullfrog have shown that there are two auditory receptor organs within the frog's inner ear which are sensitive over nearly disjoint frequency ranges. Stimuli whose frequencies lie between these ranges have mainly an inhibitory effect upon the response of the nerve fibers that innervate the low-frequency organ. It has be... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Neural correlates of the aural combination tone 2f1- f2

    Publication Year: 1968, Page(s):981 - 992
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1112 KB)

    Physiological studies confirm the nineteenth-century view that the phenomenon of aural combination tones has important implications for the understanding of the auditory system. Responses of single fibers in the auditory nerve of anesthetized cats were studied for evidence of combination tones when the acoustic stimulus consisted of two sinusoidal tones. The stimulus frequencies were chosen so tha... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interpretation of spontaneous spike discharge patterns of neurons in the cochlear nucleus

    Publication Year: 1968, Page(s):993 - 1004
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2131 KB)

    Experimental studies with microelectrodes have resulted in quantitative statistical descriptions of spike discharge patterns of both cochlear nucleus neurons and the cochlear nerve fibers that innervate them. A renewal stochastic process provides a useful descriptive model for the discharge patterns of cochlear nerve fibers in the absence of acoustic stimuli. If it is assumed that the total input ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Centrifugal control mechanisms

    Publication Year: 1968, Page(s):1005 - 1008
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (421 KB)

    There has been a long-standing descriptive dichotomy between sensorimotor activity of the spinal reflex type, involving only an integrative pattern of connections between sensory and motor nerves within a restricted (low) region of the central nervous system, and discriminative activity, involving ascent of sensory information to a cortical level followed by an appropriate motor output from that l... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The human eye as an optical filter

    Publication Year: 1968, Page(s):1009 - 1014
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1508 KB)

    The properties of the image-forming elements of the human eye are compared with the properties of the retina-brain system by considering them as two linear optical filters in cascade. The contrast sensitivity of the complete system is measured at a number of spatial frequencies by generating grating patterns of variable contrast and spatial frequency on an oscilloscope. Similar gratings are genera... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electrical response of single photoreceptors

    Publication Year: 1968, Page(s):1015 - 1023
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (951 KB)

    The responses to be dealt with are potential changes with latencies of several milliseconds recorded from within single photoreceptors using micropipette electrodes having tip diameters less than 0.1 micron. These responses were obtained from single cones in the carp and single photoreceptors in the octopus. The intracellular placement of the electrode was achieved by mounting the retina on a vibr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interpretation of responses of visual cells of limulus

    Publication Year: 1968, Page(s):1024 - 1032
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (858 KB)

    Assuming that visual responses are due to the action of particles on the membrane of the visual cells, the stochastic variability of the response should be a function of the number of particles producing it. Quantitative predictions can be made with the aid of a model proposed in previous articles. It is found that responses produced in visual cells of Limulus by absorption of a single photon have... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The oculomotor control system: A review

    Publication Year: 1968, Page(s):1032 - 1049
    Cited by:  Papers (53)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2266 KB)

    This paper reviews the literature on eye movements from the standpoint of automatic control systems. Some general reference to the neurophysiology and neuroanatomy of the oculomotor system is made, but the emphasis is upon those interdisciplinary studies which, either qualitatively or quantitatively, describe eye movements within the framework of control systems theory. Reviewed are the four major... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transformation of cortical motor signals in spinal cord

    Publication Year: 1968, Page(s):1049 - 1058
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1059 KB)

    A review of the neuronal organization of the corticospinal (pyramidal) system is presented. Parameters of pyramidal tract fibers are described; special attention is paid to the existence of pyramidal neurons with fast- and slow-conducting axons which have different locations of somata over the sensorimotor cortex, different locations of terminals on spinal neurons, and different parameters of impu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Models for the generation of the motor output pattern in flying locusts

    Publication Year: 1968, Page(s):1058 - 1064
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The motor output to the flight muscles of flying locusts is described briefly. Model neural networks that simulate many aspects of this output pattern are discussed. The model networks studied consisted of interconnected electronic analogs of unit patches of neural membrane. The analog units were designed by E. R. Lewis. The simplest network model, which we believe simulates the locust flight-cont... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The electrical properties of metal microelectrodes

    Publication Year: 1968, Page(s):1065 - 1071
    Cited by:  Papers (234)  |  Patents (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (842 KB)

    The electrical properties of metal microelectrodes for single-unit recording are reviewed. An equivalent circuit is presented, the elements of which are discussed. The most important element is the electrolytic capacitor formed by the metal-electrolyte interface. Its value is about 0.2 pF/µ2at 1 kHz. The effects of exposed metallic area at the tip and platinization are described, a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electrical properties of glass microelectrodes

    Publication Year: 1968, Page(s):1072 - 1082
    Cited by:  Papers (38)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1088 KB)

    The electrical characteristics of a glass microelectrode can be designated as a parallel resistance and capacitance in series with a source of dc voltage. Measurement of these parameters depends upon the following factors: concentration, ionic species, pH, and the hydrostatic pressures of the electrolyte solutions inside the microelectrode and surrounding its tip. The physicochemical mechanism und... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reception of pulse-amplitude-modulated signals transmitted over a dispersive fading channel with nonstationary statistics

    Publication Year: 1968, Page(s):1087 - 1088
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (201 KB)

    The optimum linear receiver is described for the reception of PAM signals over a dispersive, randomly time-varying channel which causes intersymbol interference. For a wide-sense stationary channel the receiver is relatively simple. The results also apply to the reception of multiplexed signals where the modulation scheme is linear. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Theoretical effects of overlap capacitance upon MOS inverter output

    Publication Year: 1968, Page(s):1088 - 1089
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (179 KB)

    Gate overlap and capacitive feedthrough in digital circuits can cause performance degradation. Effects of overlap on a basic MOSFET inverter are considered. An example shows that the inverter output can be reduced significantly due to capacitive coupling. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Radiated and reactive powers in a magneto-ionic medium

    Publication Year: 1968, Page(s):1089 - 1090
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    The concepts of radiated and reactive powers associated with a current source in a magneto-ionic medium are examined both in the frequency and in the time domains. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transient analysis of TEM transmission lines

    Publication Year: 1968, Page(s):1090 - 1092
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The method of characteristics is suitable for digital computer solution of TEM transmission lines. Using numerical methods, losses can be taken into account. Interconnected transmission-line networks, nonuniform lines, and nonlinear lines are considered. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A quantized delay-lock discriminator

    Publication Year: 1968, Page(s):1092 - 1093
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (219 KB)

    A new quantized delay-lock discriminator is described which uses fixed delay lines that are switched in and out, depending upon the output of a correlator. Two versions of the system, with analog-to-digital feedback and relay feedback, are discussed. Some experimental results are also included. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

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.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
H. Joel Trussell
North Carolina State University