OBJECTIVE: The authors investigated the neurobiological basis of poor sleep and daytime fatigue in insomnia. METHOD: [(18)F]Fluorodeoxyglucose positron emission tomography was used to assess regional cerebral glucose metabolism of seven patients with insomnia and 20 healthy subjects. RESULTS: Compared with healthy subjects, patients with insomnia showed greater global cerebral glucose metabolism during sleep and while awake, a smaller decline in relative metabolism from waking to sleep states in wake-promoting regions, and reduced relative metabolism in the prefrontal cortex while awake. CONCLUSIONS: Subjectively disturbed sleep in patients with insomnia is associated with greater brain metabolism. The inability to fall asleep may be related to a failure of arousal mechanisms to decline in activity from waking to sleep states. Further, daytime fatigue may reflect decreased activity in the prefrontal cortex resulting from inefficient sleep.
OBJECTIVE: The authors investigated the neurobiological basis of poor sleep and daytime fatigue in insomnia. METHOD: [(18)F]Fluorodeoxyglucose positron emission tomography was used to assess regional cerebral glucose metabolism of seven patients with insomnia and 20 healthy subjects. RESULTS: Compared with healthy subjects, patients with insomnia showed greater global cerebral glucose metabolism during sleep and while awake, a smaller decline in relative metabolism from waking to sleep states in wake-promoting regions, and reduced relative metabolism in the prefrontal cortex while awake. CONCLUSIONS: Subjectively disturbed sleep in patients with insomnia is associated with greater brain metabolism. The inability to fall asleep may be related to a failure of arousal mechanisms to decline in activity from waking to sleep states. Further, daytime fatigue may reflect decreased activity in the prefrontal cortex resulting from inefficient sleep.
Authors: Sean P A Drummond; Matthew Walker; Erin Almklov; Manuel Campos; Dane E Anderson; Laura D Straus Journal: Sleep Date: 2013-09-01 Impact factor: 5.849
Authors: Rachel E Salas; Joseph M Galea; Alyssa A Gamaldo; Charlene E Gamaldo; Richard P Allen; Michael T Smith; Gabriela Cantarero; Barbara D Lam; Pablo A Celnik Journal: Sleep Date: 2014-03-01 Impact factor: 5.849
Authors: Kanika Bagai; Amanda C Peltier; Beth A Malow; André Diedrich; Cyndya A Shibao; Bonnie K Black; Sachin Y Paranjape; Carlos Orozco; Italo Biaggioni; David Robertson; Satish R Raj Journal: J Clin Sleep Med Date: 2016-05-15 Impact factor: 4.062
Authors: Daniel B Kay; Helmet T Karim; Adriane M Soehner; Brant P Hasler; Kristine A Wilckens; Jeffrey A James; Howard J Aizenstein; Julie C Price; Bedda L Rosario; David J Kupfer; Anne Germain; Martica H Hall; Peter L Franzen; Eric A Nofzinger; Daniel J Buysse Journal: Sleep Date: 2016-10-01 Impact factor: 5.849