Evaluating timing in spontaneously hypertensive and Wistar-Kyoto rats using the peak procedure |
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Authors: | Andrew T. Fox |
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Affiliation: | Department of Psychology, 2176 Health Professions Building, Central Michigan University, Mount Pleasant, MI 48859, United States |
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Abstract: | A core deficit in timing may underlie the symptoms of attention-deficit/hyperactivity disorder (ADHD). Timing deficits have been observed in ADHD-diagnosed children but have yet to be fully explored in the spontaneously hypertensive rat (SHR), a purported model of ADHD. We asked whether SHRs demonstrate ADHD-like timing deficits using the peak procedure. Response rates across peak intervals were modeled using the sum of two Gaussian curves. Results showed that SHRs peaked earlier than Wistar-Kyotos based on 4 s intervals that contained the individuals’ maximum response rates but not based on model parameters. The strains showed approximately equal precision of timing based on Weber fractions derived from model parameters, a result that replicates previous findings and does not support the use of SHRs to model this aspect of ADHD. |
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Keywords: | ADHD Animal models Peak procedure Spontaneously hypertensive rat Timing |
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