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Abstract:
Cerebellar dysfunction has been hypothesized to produce
"cognitive dysmetria", resulting from a disruption in the fluid
processing of information across and between various channels
(Andreasen et al. 1999). To evaluate this hypothesis, we will
examine the role of the cerebellum in integrating sensory
information from different modalities. Neurological patients with
cerebellum lesions will make temporal order judgments of two
events, one visual and one auditory. The inter-stimulus interval
will be adjusted to determine the mean and variance of the point of
subjective simultaneity. If the cerebellum is critical for
coordinating the processing of sensory information, we expect to
see differences in these values for the patients as compared to a
control group. Given previous work implicating the cerebellum in
temporal processing, the study will also shed light on the
relationship between judgments of temporal order and judgments of
temporal extent.
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