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Publications [#254565] of Christina L. Williams

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Journal Articles

  1. Meck, WH; Williams, CL (1997). Simultaneous temporal processing is sensitive to prenatal choline availability in mature and aged rats.. Neuroreport, 8(14), 3045-3051. [9331912], [doi]
    (last updated on 2020/09/24)

    Abstract:
    Rats were trained at 2-4 months and at 24-26 months of age on a peak-interval timing procedure in which auditory and visual stimuli signaled two different fixed-interval schedules of reinforcement (15 and 30 s) that were presented simultaneously in a hierarchical fashion. Compared with control rats, increases in the probability of attention to the 15 s signal were observed for both the choline-supplemented and the choline-deficient rats. In contrast, an increase in attention to the 30 s signal was only observed for the choline-supplemented rats, whereas choline-deficient rats exhibited a decrease in attention that increased with age. Proportional rightward shifts in the remembered times of reinforcement emerged for the 24-26-month-old rats in the choline-deficient and control groups, but not in the choline-supplemented group. These results indicate that prenatal choline supplementation facilitates cognitive function across the lifespan, whereas prenatal choline deficiency impairs divided attention and accelerates age-related declines in temporal processing.


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