1. Detecting activities of multiple neurotrophins to see the complex effect of acute sleep deprivation on mood and behavior in humans

   • Makoto Uchiyama

   Editorial 26 November 2021 Pages: 1 - 2

2. Japanese clinical guideline for sleep apnea syndrome (SAS)

   • Hiroshi Kadotani

   Editorial 25 November 2021 Pages: 3 - 3

3. Sleep Apnea Syndrome (SAS) Clinical Practice Guidelines 2020

   • Tsuneto Akashiba
   • Yuichi Inoue
   • Shin-Ichi Momomura

   Guideline Open access 03 January 2022 Pages: 5 - 37

   

4. Management of chronic insomnia using hypnotics: a friend or a foe?

   • Aniruddha Basu
   • Tanmay Joshi
   • Ravi Gupta

   Review Article 09 January 2022 Pages: 39 - 46

   

5. Efficacy of the triple-combination SM-1 in a 5-h phase advance transient insomnia model

   • Thomas Dahl
   • Gary Zammit
   • Thomas Roth

   Original Article 08 July 2021 Pages: 47 - 52

6. A cross-sectional epidemiological study of the relationship between sleep duration, quality, and rhythm and presenteeism in workers

   • Osamu Itani
   • Yoshitaka Kaneita
   • Yu Kinoshita

   Original Article Open access 08 July 2021 Pages: 53 - 63

7. Continuous positive airway pressure treatment in sleep apnea: patient compliance and impact on the right heart

   • Michał Harańczyk
   • Małgorzata Konieczyńska
   • Wojciech Płazak

   Original Article Open access 03 July 2021 Pages: 65 - 72

   

8. Acute sleep deprivation immediately increases serum GDNF, BDNF and VEGF levels in healthy subjects

   • Yasemin Gorgulu
   • Okan Caliyurt
   • Mehmet Bulent Sonmez

   Original Article 15 July 2021 Pages: 73 - 79

   

9. Importance of sleep quality in functional abdominal pain disorder in pediatric patients

   • Hyun Jin Kim

   Original Article 23 July 2021 Pages: 81 - 85

10. Longitudinal epidemiological study of subjective sleep quality in Japanese adolescents to investigate predictors of poor sleep quality

    • Yuuki Matsumoto
    • Yoshitaka Kaneita
    • Yu Kinoshita

    Original Article 27 July 2021 Pages: 87 - 96

11. Nighttime cell phone use and sleep quality in young adults

    • Suresh C. Joshi
    • Jay Woodward
    • Steven Woltering

    Original Article 08 November 2021 Pages: 97 - 106

12. Absence of multiple sleep-onset rapid eye movement periods (SOREMPs) is not a specific feature of patients with pathological sleep prolongation

    • Makoto Honda
    • Shinya Kimura
    • Wakako Ito

    Original Article 25 September 2021 Pages: 107 - 114

13. The positional characteristics of patients with obstructive sleep apnea: a single institute retrospective study in Japan

    • Shuhei Nozawa
    • Kazuhisa Urushihata
    • Masayuki Hanaoka

    Original Article 14 September 2021 Pages: 115 - 121

    

14. Sleep disturbances and correlates among a sample of preschool children in rural China

    • Tianming Zhao
    • Kun Xuan
    • Yehuan Sun

    Original Article 08 October 2021 Pages: 123 - 136

15. Genome-wide association study of idiopathic hypersomnia in a Japanese population

    • Kotomi Tanida
    • Mihoko Shimada
    • Taku Miyagawa

    Original Article 12 October 2021 Pages: 137 - 148