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Cerebellar dysfunctions of temporal processing in the seconds range in humans
C Malapani1, B Dubois, G Rancurel
1Department of Psychology, Columbia University, NY, USA.
Neuroreport
|January 6, 1999
Summary
The cerebellum, not just the basal ganglia, is crucial for timing, even for durations lasting seconds. Lesions in the lateral cerebellum impair time estimation more than those in the mesial cerebellum.
Area of Science:
- Neuroscience
- Cognitive Science
- Behavioral Science
Background:
- The precise roles of the basal ganglia and cerebellum in time perception are debated.
- Previous research suggested a dissociation based on temporal range, with cerebellum studies focusing on sub-second intervals and basal ganglia studies on longer durations.
Purpose of the Study:
- To investigate the cerebellum's role in timing for durations in the seconds range.
- To compare timing deficits in patients with lateral versus mesial cerebellar lesions.
Main Methods:
- Patients with focal cerebellar lesions (lateral vs. mesial) and control groups were trained to remember durations in the seconds range.
- Time estimation variability was analyzed.
Main Results:
- Patients with lateral cerebellar cortex and nuclei lesions exhibited increased and scalar variability in time estimates compared to those with mesial cerebellar lesions.
- These findings suggest the lateral cerebellum is involved in timing durations of seconds.
Conclusions:
- The cerebellum's role in timing extends beyond sub-second intervals.
- Timing deficits in the seconds range are present in patients with lateral cerebellar damage, contrasting with basal ganglia lesion effects.