Related by context. Frequent words. (Click for all words.) 69 REM sleep 62 arousals 58 restorative sleep 56 wakefulness 53 paresthesia 52 luteal phase 52 awakenings 52 wakeful 51 Obstructive sleep apnea 51 syndrome RLS 50 paroxysmal 49 overactivity 49 diurnal 48 daytime sleepiness 48 dyskinesias 48 brain lesions 48 sleep 47 RLS symptoms 47 muscle rigidity 47 hypoxemia 47 blood oxygen saturation 47 hippocampal 46 prepubertal 46 perimenopause 46 dysphoria 46 restful sleep 46 circadian 46 tasimelteon 46 delusions hallucinations 46 alveolar 46 Ghrelin 45 hyperactivity impulsivity 45 pharyngeal 45 menstrual bleeding 45 msec 45 plasma glucose 45 circadian rhythm 45 Physiologically 45 amplitudes 45 pineal gland 45 menses 45 somatic symptoms 45 QTc interval 45 dysthymia 45 hippocampal volume 45 metabolic abnormalities 45 EEGs 45 post operatively 45 symptom severity 44 basal metabolic rate 44 oscillatory 44 locomotor 44 cerebellar 44 nystagmus 44 sensorimotor 44 anterior cingulate 44 dose titration 44 gastric emptying 44 symptomatology 44 wakening 44 theta 44 sleep disturbances 44 vasodilation 44 painful urination 44 anhedonia 44 biphasic 44 arousal 44 serum testosterone 44 Sexual intercourse 44 ambulation 44 GERD symptoms 43 limbic 43 parasympathetic 43 hypnotics 43 hyperglycaemia 43 depression irritability 43 neuronal activity 43 Narcolepsy 43 tachycardia 43 midbrain 43 loud snoring 43 electroencephalogram EEG 43 nocturia 43 habituation 43 fat oxidation 43 decrements 43 Fig. 1A 43 sleepiness 43 excessive sleepiness 43 contractility 43 involution 43 headache dizziness 43 migraineurs 43 arterial stiffness 43 Numbness 43 Gestational diabetes 43 frontal cortex 43 polysomnography 43 brainstem 43 photophobia 43 circadian clocks