1 | Sleep as trigger factor for headache (excessive, reduced or disrupted, increased deep sleep) |
2 | Sleep as relieving factor for headache |
3 | Sleep disturbance as cause of headache (es. sleep apnea) |
4 | Headache as cause of sleep disturbance (es. attacks occurring during sleep) |
5 | Sleep disorders in headache patients (parasomnias, sleepwalking) |
6 | Sleep related headache: |
a) Temporal relationship (during or after sleep) | |
b) Sleep stage relationship: | |
1. REM sleep (migraine, cluster headache, chronic paroxysmal hemicrania) | |
2. Slow-wave sleep (migraine) | |
7 | Headache/sleep association: |
a) Intrinsic origin (modulation through the same neurotransmitters) | |
b) Extrinsic origin (i.e. fibromyalgia syndrome) | |
c) Reinforcement (bad sleep hygiene) |