Journal
NEUROPSYCHOLOGIA
Volume 46, Issue 7, Pages 1927-1939Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuropsychologia.2008.01.021
Keywords
temporal processing; interval timing; frontotemporal dementia; others
Funding
- NATIONAL INSTITUTE OF MENTAL HEALTH [R01MH076227] Funding Source: NIH RePORTER
- NIMH NIH HHS [R01 MH076227, R01 MH76227, R01 MH076227-01A1] Funding Source: Medline
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Previous research suggests that the frontal lobes are essential for temporal processing. We report a patient, MN, with probable frontotemporal dementia (FTD) who was tested on a battery of timing tasks with stimuli in the sub- and supra-second range. MN demonstrated a substantial over-estimation and under-production of target intervals on estimation and production tasks respectively but was as accurate as controls on a reproduction task. Furthermore, this deficit was markedly different for auditory and visual stimuli on production and estimation tasks; estimates of the duration of auditory stimuli were three to four times longer than for comparable visual stimuli. She performed normally on a task requiring her to judge whether a stimulus was longer or shorter than a standard duration with both sub- and supra-second stimuli. She performed well on control tasks involving estimation, production and reproduction of line lengths suggesting that her deficits were not attributable to a generalized cognitive impairment or an inability to make magnitude judgments. These data suggest that bifrontal pathology disrupts the clock or memory for time. (c) 2008 Elsevier Ltd. All rights reserved.
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