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Functional Mapping of Sequence Learning in Normal Humans
Learning-related increases of cerebral blood flow were located in contralateral motor effector areas including motor cortex, supplementary motor area, and putamen, consistent with the hypothesis that nondeclarative motor learning occurs in cerebral areas that control limb movements.
Explicit and Implicit Contributions to Learning in a Sensorimotor Adaptation Task
It is concluded that visuomotor adaptation, even in the absence of instruction, results from the interplay between explicit learning driven by target error and implicit learning of a forward model driven by prediction error.
Timing Functions of The Cerebellum
  • R. Ivry, S. Keele
  • Psychology, Medicine
    Journal of Cognitive Neuroscience
  • 1 April 1989
The results suggest that the domain of the cerebellar timing process is not limited to the motor system, but is employed by other perceptual and cognitive systems when temporally predictive computations are needed.
The cognitive and neural architecture of sequence representation.
The authors theorize that 2 neurocognitive sequence-learning systems can be distinguished in serial reaction time experiments, one dorsal (parietal and supplementary motor cortex) and the other ventral (temporal and lateral prefrontal cortex), which are relevant to issues of attentional effects on learning.
Whorf hypothesis is supported in the right visual field but not the left.
It appears that people view the right (but not the left) half of their visual world through the lens of their native language, providing an unexpected resolution to the language-and-thought debate.
Dedicated and intrinsic models of time perception
Although intrinsic models are neurally plausible, several issues must be addressed before they dispense with models of duration perception that are based on dedicated processes.
Motor sequence learning with the nondominant left hand
Implicit sequence learning by the nondominant left hand was examined with the serial reaction time (SRT) task during functional brain imaging, and mirror transformation of the sequence by the right hand was associated with a marked increase in regional activity in the left motor cortex, consistent with a role for sequential transformation at this level of the motor output pathway.
Ipsilateral motor cortex activity during unimanual hand movements relates to task complexity.
A control experiment revealed that strong ipsilateral activity in left motor cortex is specific to complex movements and does not depend on the number of required muscles.
Perception and production of temporal intervals across a range of durations: evidence for a common timing mechanism.
  • R. Ivry, R. Hazeltine
  • Psychology, Medicine
    Journal of experimental psychology. Human…
  • 1 February 1995
The results suggest that temporal judgments and productions are based on an integrated internal representation of the target interval rather than reference to an internal oscillatory process.
The representation of temporal information in perception and motor control
  • R. Ivry
  • Psychology, Medicine
    Current Opinion in Neurobiology
  • 1 December 1996
Two subcortical structures, the cerebellum and basal ganglia, play a critical role in the timing of both movement and perception and are examined from both a neurological and a computational perspective.