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Dynamic properties of the responses of single neurones in the cochlear nucleus of the rat.
Author(s) -
Moller A R
Publication year - 1976
Publication title -
the journal of physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.802
H-Index - 240
eISSN - 1469-7793
pISSN - 0022-3751
DOI - 10.1113/jphysiol.1976.sp011455
Subject(s) - covariance , impulse (physics) , impulse response , oscillation (cell signaling) , mathematics , amplitude , control theory (sociology) , physics , time constant , acoustics , mathematical analysis , chemistry , computer science , statistics , optics , engineering , classical mechanics , electrical engineering , biochemistry , control (management) , artificial intelligence
1. The dynamic properties of unit responses to amplitude‐modulated tones were studied using modulation with pseudorandom noise and described by cross‐covariance and integrated cross‐covariance functions between the discharge rate and the modulation. Under the experimental conditions used, these two functions are valid approximations of the system's impulse and step response functions respectively. 2. On the basis of their impulse response functions units could be classified into two groups, Type I with a low adaptation and Type II with a large degree of adaptation as well as a damped oscillation in their impulse response functions. 3. The response pattern of the Type II units is most likely the result of a negative feed‐back striving to keep the discharge rate at a nearly constant level. 4. The cross‐covariance functions are shown to remain unchanged during long duration recordings from the same unit.