A STUDY OF THE MULTI-CHANNEL VISUAL EVOKED POTENTIALS IN ADULT CATS
正常成年猫多导程视觉诱发电位研究

Multi-channel P-VEPs and F-VEPs were studied in 17 adult Cats. Thefollowing adults were obtained:1. The P-VEP wave complex consists of triple positive, negahve, and positive components (W-type). The F-VEP wave complex elied by plane homogenoous flash also containS three component, but the sequence is negatiVe-positive - negahve (M-type). Both typesof VEP showed clearly .binocular stnnmation.2. The P-VEPs obtained from different channels were symmetrically distributed on twosides of the scalp. The maxial amplitude was recorded from the midline chalmel and theamplitudes fell off symmetrically on both sides of the head. However, the amplitude ofF-VEP rmuled from the brine channel was minimum and those recorded from bilanteralchannels were larger as Well as symmetrical.3. When the spatial fequency (SF) of the cheCkboard was inrmed, the peak haplidtthe was delayed. The amplitude of the P-VEP was the highest at the 0.1c/deg SF and thendaised with increasing SF of stimulation.4. The P-VEP COmplexeS from different channels remained W-type, when the half fieldstimulation was used. In companion with the whole field stimulation, the amplitude was muchsmallers. The asponses elied with the striation of nasal retina were larger than those elicital with the stimulation of temporal retina.