Contribution of Frontal Lobe to Prospective Time Estimation

DOI 3 References
  • Kurosaki Yoshiko
    Department of Rehabilitation, Ohtawara Red Cross Hospital Department of Rehabilitation, Nasu Red Cross Hospital. Graduate School of Modern Society and Culture, Niigata University
  • Terasawa Yuri
    The Japan Society for the Promotion of Science National Center of Neurology and Psychiatry
  • Umeda Satoshi
    Department of Psychology, Keio University

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  • 予期的時間評価における前頭葉の関与

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Abstract

   Prospective time estimation reflects an individual’s cognitive capability to estimate time intervals in various progressive situations. Several studies have shown that deficits in the estimation of time intervals are often associated with damage to the frontal and temporal lobes. In the present study, we investigate the contribution of the frontal lobes to prospective time estimation as well as the relationships among time estimation, attention, working memory and episodic memory. The participants, patients with brain damage and normal controls, were asked to produce the duration of 60 seconds under three conditions: 1) an empty task, 2) a reading-numbers task and 3) a calculation-on-paper task. The main results were that the participants had a tendency to overestimate time intervals under conditions where the concurrent task demanded more cognitive processing. Patients with localized frontal lobe damage substantially overestimated time intervals compared to normal controls. Attention and working memory affected prospective time estimation, whereas episodic memory did not. Together these results suggest that the frontal lobes contribute to prospective time estimation and that the allocation of attention, which is usually associated with working memory, also influences prospective time estimation.

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