Prospective comparison of subjective arousal during the pre-sleep period in primary sleep-onset insomnia and normal sleepers.
Psychophysiological insomnia (PI) is the most common insomnia subtype, representing 12-15% of all sleep centre referrals. Diagnostic guidelines describe PI as an intrinsic sleep disorder involving both hyperarousal and learned sleep-preventing associations. Whilst evidence for the first component is reasonably compelling, evidence for learned (conditioned) sleep effects is markedly lacking. Indeed, to date no study has attempted to capture directly the conditioned arousal effect assumed to ch...Expand abstract
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