SLIDE 7 3/2/19 7
N1 N2 Time of Day
fMRI scan
f f f
Dark/sleep phase in lab Recovery sleep
DLMO assessment
MISALIGNED CONDITION “School day”
10 12 14 16 18 20 22 2 4 6 8 10 N1 N2 Dark/sleep phase in lab Recovery sleep 10 12 14 16 18 20 22 2 4 6 8 10
DLMO assessment
f f
ALIGNED CONDITION “Weekend”
K01 Protocol: Aligned vs Misaligned
1 2 3 4 5 6 7 10 12 14 16 18 20 22 2 4 6 8 10 Dark/sleep phase at home
STABILIZATION WEEK (at home)
EACH CONDITION STARTS WITH: FOLLOWED BY EITHER… …OR…
Light/wake phase at home
Study Days
Does circadian misalignment impact the neural response to reward?
Hasler (in preparation)
Circadian misalignment reduces neural response during response inhibition
Aligned > Misaligned - AM
Logan, Barlow, and Hasler (in preparation)
- Go/No-Go task; No-Go vs Rest
249 voxel cluster peaking in left inferior frontal gyrus (t=7.25, cluster pFWE < 0.001)
- No difference on behavioral
measure of accuracy during No-Go trials; no differences on Delay Discounting Task
- No regions showed greater
activation during Misaligned condition (AM or PM)
- Included DLMO covariate
- Strong evidence of circadian-reward links in animal lit
- Growing evidence of circadian-reward links in humans
- Next steps
– More experimental designs and use of physiological measures
- Advance sleep timing & extend sleep duration to reduce risk
– More focus on circadian phenotype – Unpacking of “eveningness”—addiction association using objective sleep and circadian measures- Is it all about circadian misalignment? – Drilling down into social jet lag construct – timing vs duration; context – Research on caffeine’s role in teen circadian misalignment and addiction
Conclusions; what’s next Ongoing adolescent studies
Short-term 8-day protocol Long-term 3- and 6- month follow-ups Day of Study 1 2 3 4 5 6 7 8
sleep/circadian function
reward function
- Alcohol and drug use
- ver past 3 months
Day of Week M T W Th F Sa Su M Sleep Diary and actigraphy daily Circadian phase DLMO DLMO gene expression Neural activity fMRI Experience Positive & negative affect, craving –every ~3h during waking Behavior Alcohol and drug use, social context – every ~3h during waking
SOCIAL JET LAG STUDY: 150 high school drinkers (stratified across sleep timing) DELAYED SLEEP PHASE STUDY: 150 high schoolers (100 “delayed” phase 50 “normal” phase)
R01 AA025626; R01 DA 044143
Daniel Buysse, MD
Erika Forbes, PhD
Peter Franzen, PhD
Stephanie Holm, MD
Ron Dahl, MD
Richard Bootzin, PhD
Wambui Ngari
Grants from the National Institutes of Health: K01DA032557 (Hasler), R21AA023209 (Hasler), R01AA025626 (Hasler), R01 DA044143 (Hasler), U01AA021690 (Clark), K24AA0202840 (Martin), R01AA13397, K01MH077106 (Franzen), R01DA018910 (Dahl), R01DA026222 (Forbes, Shaw), K01MH074769 (Forbes), T32HL082610 (Buysse), R01MH024652 (Buysse)
Dissertation Research Awards from American Psychological Association, Society for a Science of Clinical Psychology, and the Social and Behavioral Sciences Research Institute, University of Arizona.
Contract from Office of National Drug Control and Policy
Acknowledgments
Duncan Clark, PhD, MD
Sarah Pedersen, PhD
Daniel Shaw, PhD
Stephanie Sitnick, PhD
Happy Fletcher
Scott Bruce, PhD
Deb Scharf, PhD