Human brain‐stem auditory evoked responses obtained by cross correlation to trains of clicks, noise bursts, and tone bursts

1991 ◽  
Vol 90 (3) ◽  
pp. 1398-1404 ◽  
Author(s):  
Robert Burkard
Keyword(s):  
Human Brain ◽  
Brain Stem ◽  
Cross Correlation ◽  
Evoked Responses ◽  
Auditory Evoked Responses

Auditory Evoked Responses Obtained by Cross-Correlation: A Preliminary Report

1980 ◽  
Vol 88 (6) ◽  
pp. 797-802 ◽  
Author(s):  
Robert A. Dobie ◽  
Ben M. Clopton
Keyword(s):  
Brain Stem ◽  
Cross Correlation ◽  
Dynamic Range ◽  
Evoked Responses ◽  
Auditory Evoked Responses ◽  
Highly Nonlinear ◽  
System Output ◽  
Noise Input ◽  
Stem Lesions ◽  
Brain Stem Evoked Response

In linear systems analysis, a system is often studied by determining its response to impulsive stimulation. Alternatively, the system's response to continuous noise may be measured; cross-correlation of input and output then yields a function identical to the impulse response. This approach has been extended to auditory evoked responses, using vertex potentials as the system output. Although the auditory system, viewed as a brain stem evoked response generator, is highly nonlinear, replicable cross-correlograms were obtained in a series of guinea pigs. Stimulus artifact was ruled out by comparison of these responses with autocorrelograms of the noise stimulus. Responses decreased in amplitude with decreasing stimulus intensity. Experiments involving brain stem lesions and anoxia suggested that the short-latency cross-correlogram reflects cochlear microphonic, auditory nerve, and brain stem contributions. Study of bioelectric potentials by cross-correlation with noise input allows data acquisition continuously, without the limitations in stimulus repetition rate and dynamic range imposed by impulse (eg, click) analysis. This approach may prove useful in both experimental and clinical settings.

Brain Stem Auditory Evoked Responses

2009 ◽  
Vol 62 (1) ◽  
pp. 64-64
Author(s):  
Khalil Kayed ◽  
Reidar Kloster
Keyword(s):  
Brain Stem ◽  
Evoked Responses ◽  
Auditory Evoked Responses
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