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Neural Substrates Of Impaired Sensorimotor Timing In Adult Attention-Deficit/Hyperactivity Disorder, Eve M. Valera Phd, Rebecca M. C. Spencer, Thomas A. Zeffero Md, Phd, Nikos Makris Md, Phd, Thomas J. Spencer Md, Stephen V. Faraone Phd, Joseph Biederman Md, Larry J. Seidman Phd
Neural Substrates Of Impaired Sensorimotor Timing In Adult Attention-Deficit/Hyperactivity Disorder, Eve M. Valera Phd, Rebecca M. C. Spencer, Thomas A. Zeffero Md, Phd, Nikos Makris Md, Phd, Thomas J. Spencer Md, Stephen V. Faraone Phd, Joseph Biederman Md, Larry J. Seidman Phd
Rebecca M. C. Spencer
Background—Timing abilities are critical to the successful management of everyday activities and personal safety, and timing abnormalities have been argued to be fundamental to impulsiveness, a core symptom of attention-deficit/hyperactivity disorder (ADHD). Despite substantial evidence of timing deficits in ADHD youth, only two studies have explicitly examined timing in ADHD adults, and only at the supra-second time-scale. Also, the neural substrates of these deficits are largely unknown for both youth and adults with ADHD. The present study examined sub-second sensorimotor timing and its neural substrates in ADHD adults. Methods—Using fMRI, we examined paced and unpaced finger tapping in a sample …
Timing Variability In Circle Drawing And Tapping: Probing The Relationship Between Event And Emergent Timing, Howard N. Zelaznik, Rebecca M. C. Spencer, Richard B. Ivry, Alex Baria, Melissa Bloom, Lisa Dolansky, Shannon Justice, Kristen Patterson, Emily Whetter
Timing Variability In Circle Drawing And Tapping: Probing The Relationship Between Event And Emergent Timing, Howard N. Zelaznik, Rebecca M. C. Spencer, Richard B. Ivry, Alex Baria, Melissa Bloom, Lisa Dolansky, Shannon Justice, Kristen Patterson, Emily Whetter
Rebecca M. C. Spencer
R. Ivry, R. M. Spencer, H. N. Zelaznik, and J. Diedrichsen (2002) have proposed a distinction between timed movements in which a temporal representation is part of the task goal (event timing) and those in which timing properties are emergent. The issue addressed in the present experiment was how timing in conditions conducive to emergent timing becomes established. According to what the authors term the transformation hypothesis, timing initially requires an event-based representation when the temporal goal is defined externally (e.g., by a metronome), but over the first few movement cycles, control processes become established that allow timing to become …