Time perception impairment in multiple sclerosis patients: a survey on internal clock model

Area of Science:

• Neuroscience
• Cognitive Psychology
• Chronobiology

Background:

• Time perception is a complex cognitive function involving multiple brain areas.
• Alterations in time perception are observed in various neurological conditions.
• The specific impact of multiple sclerosis (MS) on time perception remains largely unexplored.

Purpose of the Study:

• To investigate temporal processing domains in patients with multiple sclerosis (MS).
• To explore potential factors influencing time perception in MS, including demyelination location and gender.
• To compare time perception in MS patients with healthy controls.

Main Methods:

• Utilized a quadruplet of time perception tasks: prospective time estimation, duration discrimination, temporal reproduction, and paced motor timing.
• Employed a software program for task design and execution.
• Recruited 27 MS patients and 30 healthy controls for the study.

Main Results:

• MS patients demonstrated significantly higher scores in time estimation (p < 0.01) and duration discrimination (p < 0.001 for 100-ms, p < 0.05 for 1000-ms intervals).
• These findings indicate a consistent overestimation of time by individuals with MS.
• Results contrast with the hypothesis of a slower internal clock, which would predict underestimation.

Conclusions:

• Multiple sclerosis significantly affects time perception, leading to time overestimation.
• The observed overestimation challenges the conventional internal clock model in the context of MS.
• Further research is needed to elucidate the neural mechanisms underlying altered time perception in MS.