日本衛生学雑誌
Online ISSN : 1882-6482
Print ISSN : 0021-5082
ミニ特集 睡眠の衛生学
電子書籍使用が前頭前野脳血流におよぼす影響
杉浦 明弘衞藤 拓也木下 史也髙田 宗樹
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ジャーナル フリー

2018 年 73 巻 1 号 p. 39-45

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Objectives: By measuring cerebral blood flow in the prefrontal cortex, we aimed to determine how reading a book on a tablet computer affects sleep.

Methods: Seven students (7 men age range, 21–32 years) participated in this study. In a controlled illuminance environment, the subjects read a novel in printed form or on a tablet computer from any distance. As the subjects were reading, the cerebral blood flow in their prefrontal cortex was measured by near-infrared spectroscopy. The study protocol was as follows. 1) Subjects mentally counted a sequence of numbers for 30 s as a pretest to standardized thinking and then 2) read the novel for 10 min, using the printed book or tablet computer. In step 2), the use of the book or tablet computer was in a random sequence. Subjects rested between the two tasks.

Results: Significantly increased brain activity (increase in regional cerebral blood flow) was observed following reading a novel on a tablet computer compared with that after reading a printed book. Furthermore, the region around Broca’s area was more active when reading on a tablet computer than when reading a printed book.

Conclusions: Considering the results of this study and previous studies on physiological characteristics during nonrapid eye movement sleep, we concluded that reading a book on a tablet computer before the onset of sleep leads to the potential inhibition of sound sleep through mechanisms other than the suppression of melatonin secretion.

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