Journal ArticleDOI
Electric responses of individual nerve elements in cochlear nucleus to sound stimulation (guinea pig).
Ichiji Tasaki,Hallowell Davis +1 more
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TLDR
The present investigation is an extension to the cochlear nucleus in the medulla oblongata of the same technique of recording action potentials with submicroscopic microelectrodes, with certain difference in behavior between the elements examined in the present investigation.Abstract:
IN A RECENT PAPER one of us (7) described the technique and the results of recording impulses from individual auditory nerve fibers in the modiolus of the guinea pig. The present investigation is an extension to the cochlear nucleus in the medulla oblongata of the same technique of recording action potentials with submicroscopic microelectrodes (6). Action potentials from single elements in the cochlear nucleus have already been successfully recorded by Galambos and Davis (2, 3, 4) with an earlier type of microelectrode. The original purpose of the present investigation was to repeat their previous observations with a finer technique. There is a certain difference in behavior between the elements examined in the present investigation and those studied previously. The “response area” of an element is the area on an intensity-frequency plot that includes all tones that evoke a positive response. The response areas of the new elements show a sharp limit on the high-frequency side and very gradual elevation of threshold on the low-frequency side. The elements studied previously had, on the contrary, fairly narrow response areas with a clear maximum of sensitivity for a certain frequency that was characteristic of the element under observation. The new and the previous elements behaved differently in one other aspect: spontaneous discharges of impulses in the new elements were not inhibited by the application of any pure tone, while in the previous elements some tones inhibited and other tones enhanced the spontaneous repetitive activity.read more
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Discharge Patterns of Single Fibers in the Cat's Auditory Nerve
TL;DR: In this paper, the discharge patterns of single fibers in cat auditory nerve in response to controlled acoustic stimuli were investigated and shown to be similar to those of human auditory nerve, and they were shown to respond to controlled stimuli.
Journal ArticleDOI
Classification of response patterns of spike discharges for units in the cochlear nucleus: tone-burst stimulation.
TL;DR: When poststimulus time histograms are computed for tone-burst stimulation, certain shapes of histograms, or response patterns, were more often observed than others for units in the cochlear nucleus.
Journal ArticleDOI
The responses of single neurones in the cochlear nucleus of the cat as a function of their location and the anaesthetic state
TL;DR: The dorsal nucleus is a more complex and more highly differentiated division of the cochlear nucleus than the ventral, both functionally and anatomically.
Journal ArticleDOI
Maintained activity in the cat's retina in light and darkness.
TL;DR: The firing probability at any time depends on the times of occurrence of the two preceding impulses only, and in such a way as to indicate that each impulse is followed by a transient depression of excitability that outlasts the following impulse.
Journal ArticleDOI
Some quantitative methods for the study of spontaneous activity of single neurons.
TL;DR: Four different illustrative examples of single unit data from the cochlear nucleus of anesthetized cats are presented and several descriptive models are suggested by these measurements.
References
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Journal ArticleDOI
The normal membrane potential of frog sartorius fibers.
Gilbert N. Ling,R. W. Gerard +1 more
Journal ArticleDOI
The response of single auditory-nerve fibers to acoustic stimulation
Robert Galambos,Hallowell Davis +1 more
TL;DR: The present report describes the behavior of single auditory fibers and stresses similarities to other sensory nerves; in a subsequent paper it is hoped to relate these findings to a specific theory of action of the mammalian cochlea.
Journal ArticleDOI
Nerve impulses in individual auditory nerve fibers of guinea pig
TL;DR: It was shown that when the response of the upper part of the cochlea (to low-frequency sounds) had been eliminated by a local injection of an isotonic KC1 solution there were still good normal responses in the basal turn, both microphonics and nerve action potentials, which exclude any sharp localization of vibratory motion in the coChlea.
Journal ArticleDOI
Action potentials from individual elements in cat geniculate and striate cortex.
Journal ArticleDOI
The Space‐Time Pattern of the Cochlear Microphonics (Guinea Pig), as Recorded by Differential Electrodes
I. Tasaki,H. Davis,J.-P. Legouix +2 more
TL;DR: In this article, pairs of very small electrodes were placed in two or more turns of the cochlea of the guinea pig and the outputs of the second, third, and fourth turns were compared with that of the first turn with respect to both amplitude and phase as a function of frequency.
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