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Mean peak ASR amplitude (±SEM) for visual prepulse inhibition is illustrated for all test sessions as a function of genotype (HIV-1 Tg vs. Control). Maximal inhibition was observed at the 50 msec ISI for both HIV-1 Tg and control animals at all test sessions. Robust inhibition to the visual prepulse was observed in both HIV-1 Tg and control animals at all assessments, suggesting the integrity of visual system function through the majority of the animal's functional lifespan.
