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Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
Published on: July 31, 2019
Cognitive timing: neuropsychology and anatomic basis
H Branch Coslett1, Jeff Shenton, Tamarah Dyer
1Department of Neurology, University of Pennsylvania School of Medicine, 3400 Spruce Street, Philadelphia, PA 19104, USA. hbc@mail.med.upenn.edu
Brain Research
|December 3, 2008
Summary
Brain lesions impact time perception, with patients showing increased variability and altered time estimation, particularly in longer intervals. Parietal lobe damage correlates with these temporal processing deficits.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Chronobiology
Background:
- Accurate time perception is crucial for various cognitive functions.
- Brain lesions can disrupt temporal processing, but the specific effects on interval estimation, production, and reproduction are not fully understood.
Purpose of the Study:
- To investigate the effects of focal hemisphere lesions on the estimation, production, and reproduction of time intervals.
- To determine the influence of stimulus modality and interval duration on temporal performance in patients with brain lesions.
Main Methods:
- Assessed 31 subjects with focal hemisphere lesions and 16 normal controls on time interval tasks (2-12 s).
- Utilized both visual and auditory stimuli for estimation and production tasks.
- Analyzed data using ANOVAs to compare performance between groups and conditions.
Main Results:
- Stimulus modality affected time production but not estimation.
- Accuracy differed significantly for 2s intervals compared to longer intervals.
- Patients with brain lesions showed greater variability in estimation and reproduction tasks and exhibited a "fast clock" pattern (under-production, over-estimation) for 4-12s intervals.
Conclusions:
- Focal hemisphere lesions, particularly in the parietal lobe, significantly impair temporal processing.
- Lesion laterality and frontal lobe involvement did not correlate with temporal performance deficits.
- The findings suggest that parietal lobe integrity is critical for accurate time perception.
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