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Purpose <p>This study examined the impact of extended wakefulness on interoceptive accuracy and how individual differences in interoception related to subjective sleepiness.</p> Methods <p>Twenty-four healthy university students participated in the study. Interoceptive accuracy was assessed using the heartbeat-counting task during daytime and midnight sessions.</p> Results <p>Interoceptive accuracy did not differ significantly between the sleep conditions. However, subjective sleepiness was negatively correlated with interoceptive accuracy at midnight.</p> Conclusions <p>Individual differences in interoceptive function may be associated with variability in perceived sleepiness under sleep pressure. These findings highlight the potential role of interoception in explaining why some individuals experience a mismatch between subjective and objective sleepiness.</p>

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The effects of sleep deprivation on interoception accuracy measured using a heartbeat-counting task

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Shoichi Asaoka,
  • Ritsuko Nishimura,
  • Shin Hiraga,
  • Rino Sato,
  • Riko Nakazawa,
  • Taro Hirashima

摘要

Purpose

This study examined the impact of extended wakefulness on interoceptive accuracy and how individual differences in interoception related to subjective sleepiness.

Methods

Twenty-four healthy university students participated in the study. Interoceptive accuracy was assessed using the heartbeat-counting task during daytime and midnight sessions.

Results

Interoceptive accuracy did not differ significantly between the sleep conditions. However, subjective sleepiness was negatively correlated with interoceptive accuracy at midnight.

Conclusions

Individual differences in interoceptive function may be associated with variability in perceived sleepiness under sleep pressure. These findings highlight the potential role of interoception in explaining why some individuals experience a mismatch between subjective and objective sleepiness.