Auditory System: Physiology (CNS)· Behavioral Studies by Moshe Abeles, Göran Bredberg, Robert A. Butler, John H.

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By Moshe Abeles, Göran Bredberg, Robert A. Butler, John H. Casseday, John E. Desmedt, Irving T. Diamond, Solomon D. Erulkar, E. F. Evans, Jay M. Goldberg, Moise H. Goldstein, David M. Green, Ivan M. Hunter-Duvar, Lloyd A. Jeffress, William D. Neff, William A

nerve; consequently, even if, they concluded that the recordings were from aberrant cells of the cochlear nucleus mendacity primary to the glial margin of the VIII nerve (GALAMBOS and DAVIS, 1948). the 1st profitable recordmgs from fibres of the cochlear nerve have been made by way of TASAKI (1954) within the guinea pig. those classical yet inevitably constrained effects have been vastly prolonged by way of ROSE, GALAMBOS, and HUGHES (1959) within the cat cochlear nucleus and via KATSUKI and associates (KATSUKI et at. , 1958, 1961, 1962) within the cat and monkey cochlear nerve. probably the main major advancements were the advent of recommendations for distinct keep an eye on of the acoustic stimulus and the quantitative research of neuronal reaction styles, particularly by means of the laboratories of KIANG (e. g. GERSTEIN and KIANG, 1960; KIANG et at. , 1962b, 1965a, 1967) and ROSE (e. g. ROSE et at. , 1967; HIND et at. , 1967). those advancements have made attainable plenty of quanti­ tative investigations of the behaviour of consultant numbers of neurons at those degrees of the peripheral auditory approach below a large choice of stimulus stipulations. lots of the findings mentioned herein were bought on anaesthetized cats. the place comparative info can be found, considerably related effects were received in different mammalian species (e. g. guinea pig, monkey, rat). convinced major adjustments were famous in lizards, frogs and fish as will be anticipate­ ed from the various morphologies in their organs of listening to (e. g.

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G. , 1971). , 1964). g. SPOENDLIN, 1972). ARTHUR et ai. (1971) have suggested that any interaction must occur peripheral to the stage of rectification associated with generator or action potential initiation, because of the preservation of waveform interaction in the spike discharge patterns. g. FURMAN and FRISHKOPF, 1964) is not supported quantitatively by the data on two-tone suppression. An alternative possibility has been suggested by the similarities between two-tone suppression in the cochlear nerve and an analogous reduction of the cochlear microphonic, where the latter could be modelled qualitatively by a system comprising a non-linearity associated with one or two filtering processes (ENGERBRETSON and ELDREDGE, 1968; PFEIFFER, 1970).

E. the discharges are "phase-locked": Fig. , 1967 in the monkey; FRISHKOPFF and GOLDSTEIN, 1963 in the bullfrog; FURUKAWA and ISHII, 1967 in the fish). , 1971; HIND, 1972). The probability of discharge of a fibre (irrespective of its OF) to a sufficiently intense low frequency tone appears to be a function of the displacement of the cochlear partition in one direction (Figs. 16B, 17, 18). Thus "folded" time histograms ("period histograms"), of the distribution of discharges relative to the period of the stimulus sinusoid, mirror the effective half-cycle of the stimulus (Figs.

Note vigorous response to combination of tones (2/1 - I. 88 kHz) in comparison with negligible response to either tone alone. 5 kHz and I. 69 kHz). Each histogram is synchronized to the fundamental frequency of the harmonically related (4: 3) primary tones. 76 kHz), close to the CF of the fibre. Spontaneous rate: 5 spikes/sec. e. level-normalized) odd-order nonlinearity (GOLDSTEIN and KIANG, 1968; GOLDSTEIN, 1970). In one curious respect, however, the neurophysiological and psychophysical data disagree: the measured phase of the psychophysical combination tone changes with the level of the primary stimuli, whereas that obtained in the cochlear nerve recordings does not (GOLDSTEIN, 1971: QPR No.

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