期刊
BEHAVIORAL NEUROSCIENCE
卷 120, 期 5, 页码 1057-1070出版社
AMER PSYCHOLOGICAL ASSOC/EDUCATIONAL PUBLISHING FOUNDATION
DOI: 10.1037/0735-7044.120.5.1057
关键词
eyeblink conditioning; cerebellum; conditioned response timing; ISI discrimination; development
资金
- NIAAA NIH HHS [1-R01-AA11945] Funding Source: Medline
- NICHD NIH HHS [1-P01-HD35466] Funding Source: Medline
Discrimination of the eyeblink conditioned response (CR) between conditioned stimuli (CSs) of different durations and modalities was examined across development in rats. Interstimulus interval (ISI) discrimination was evident at Postnatal Days 23-34 in Experiment 1, and earlier CR peak latencies and enhanced CR amplitudes were seen to the long CS in the ISI discrimination group relative to a control group receiving the short CS without reinforcement. Experiment 2 showed that early CR peak latencies and enhanced CR amplitudes to the long CS in the ISI discrimination group were due to associative pairing of the short CS and unconditioned stimulus. Experiment 3 demonstrated ISI discrimination in adults that was improved relative to younger subjects, but with no enhancement of CR amplitude to the long CS in the ISI discrimination group. Cerebellar cortical maturation may influence the ontogeny of CR timing.
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