The establishment of a clinical diagnostic method of the visual evoked potentials (VEPs) in the cat: the effects of recording electrode positions, stimulus intensity and the level of anesthesia |
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| Authors: | Y Uzuka S Doi M Tokuriki H Matsumoto |
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| Abstract: | The establishment of characteristic wave pattern of visual evoked potentials (VEPs) in the cat was attempted in order to be aid for clinical veterinary practitioners with the evaluation of visual dysfunction. 1) The position where the largest response of the VEPs was detected was close to the midline of the occipital area in normal cats. 2) The VEPs consisted of three components with latencies within 100 msec after flash stimulus. 3) Flash stimuli of higher illumination produced VEPs of shorter latencies and increased amplitude. Intensity of more than 0.6 J was necessary to obtain stable VEP patterns. 4) The latencies of VEPs hardly changed with time course under pentobarbital anesthesia, although they showed a fluctuant variation. |
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