Showing papers in "Electroencephalography and Clinical Neurophysiology in 1955"

TL;DR: The wide variety of amygdaloid stimulation effects as observed by several authors becomes understandable in view of the data presented in this study, since they show that excitation originating in the amygdala impinges upon a wide subcortical area known to contain the central representations of various integrative mechanisms regulating somatic, autonomic, behavioral and electrographic mechanisms.

TL;DR: Evidence was found that both processes may sometimes coexist in a complex multisynaptic neuronal system and excitation in the amygdaloid system must be considered as highly susceptible to fluctuations in excitability level according to the rate of firing.

TL;DR: Modulation of stimulation afferent to dendrite alone could induce potential wave forms of any duration, and the activity of dendrites appears to be such as to appropriately account for the potentials of the electrocorticogram.

TL;DR: Electroencephalograms were obtained on 400 subjects over the age of 60 as part of a project dealing with aging of the central nervous system and it was suggested that temporal foci could be more easily elicited using the vertex as a reference electrode, as well as keeping the ears “untied” and ungrounded.

TL;DR: Electroencephalograms of 71 normal children in one-year age groups ranging from 1 to 10 years inclusive were recorded and it was concluded that sharp-wave foci in children may have a less serious prognostic significance than in adults.

TL;DR: The hippocampus may participate in, and may indeed initiate the manifestation of those forms of epilepsy which are chiefly characterized by disturbances of awareness and mental confusion, and is suggested to play an important role in epilepsy in general.

TL;DR: The hypothesis is advanced that the fast cortical rhythms, characterizing the earlier stages of inhalation anesthesia, may be due to an excitatory influence upon the brain stem reticular formation.

TL;DR: It is concluded that the primary ascending visual pathways and the visual cortical projection areas play a leading role during irradiation in the intact brain.

TL;DR: The most excitable motor units were functionally different from the least excitable units, having smaller action potential amplitudes, and higher frequencies of discharge, with more “double discharges”.

TL;DR: Conclusions 6, 7, and 8 indicate that the presence of electrodes disturbs the brain activity very little, or at least, that the experimental conditions do not change during the period of observation.

TL;DR: The stapedius muscle displayed a broader frequency response spectrum and a lower threshold than the tensor tympani muscle, and showed cyclic activity for the first second, with bursts of potentials interspersed with periods of electrical silence.

TL;DR: The quantitative relation between the measured surface distribution of potentia; and the position of potential sources within the brain is examined theoretically in terms of electric fields, and a simple quantitative relationship has been shown to exist between depth of source and the distance between zero and maximum points of the gradient distribution.

TL;DR: Recording of waves in the depths of the frontal lobes in 60 psychotic patients attempted to contribute to the recognition and understanding of the wave forms in the frontal lobe and their distribution in the hope that such work will be of value in the establishment of base lines for depth electrography.

TL;DR: Extensive cortical ablations and focal lesions of the striatum were made in cats and monkeys, and the degeneration of the thalamic nuclei was studied in Nissl stain after survival periods of at least two months.

TL;DR: It is postulated that a breakdown in synaptic resistance due to diffuse neuronal disease, particularly in subcortical structures, is responsible for the phenomenon of myoclonus.

TL;DR: It was concluded that spreading depression can act as a mechanism curtailing and perhaps preventing cortical convulsions in the rabbit.

TL;DR: A new technique for the study of the electroencephalogram permits of a differentiation between electrical activity produced by stationary sources and that due to changing source configurations.

TL;DR: Electroencephalographic studies in the waking and sleeping state of 19 patients with phenylpyruvic amentia reveal that waking activity in these patients is usually abnormal and suggests a pathological process with a strong epileptic component, causing a profound disturbance of both cortical and thalamic function.

TL;DR: The clinical and electroencephalographic changes which occur during chronic secobarbital intoxication and after abrupt withdrawal of this drug were studied experimentally in two groups of former narcotic addicts without previous histories of epilepsy or psychosis.

TL;DR: It is concluded that the raised mechanical irritability of the muscles in myotonia is a property of the muscle fibre membrane.

TL;DR: It is concluded that, when selective recording techniques are used, there may be few differences electrophysiologically between clinically and pathologically dissimilar diseases of nerve and muscle.