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Improving sleep and cognition by hypnotic suggestion in the elderly
Maren Jasmin Cordi1, Sarah Hirsiger2, Susan Mérillat2
1Institute of Psychology, Division of Biopsychology, University of Zurich, Binzmühlestrasse 14, 8050 Zurich, Switzerland.
Neuropsychologia
|February 10, 2015
Summary
Hypnotic suggestions can increase deep sleep (slow-wave sleep) in elderly women. This enhancement in slow-wave sleep also led to improved cognitive function, offering a potential alternative to sleep medication.
Area of Science:
- Neuroscience
- Sleep Medicine
- Psychology
Background:
- Sleep quality and slow-wave sleep (SWS) decline with aging.
- Age-related SWS reduction is linked to cognitive decline in the elderly.
Purpose of the Study:
- To investigate if hypnotic suggestion can extend SWS in healthy elderly females.
- To assess the impact of enhanced SWS on cognitive functioning.
Main Methods:
- A placebo-controlled, cross-over study design was employed.
- Participants listened to hypnotic suggestions or a control tape before a midday nap.
- High-density electroencephalography (EEG) recorded sleep patterns.
Main Results:
- Hypnotic suggestion significantly increased SWS by 57% in suggestible elderly females compared to the control.
- Left frontal slow-wave activity (SWA) during SWS showed a significant increase post-hypnosis.
- Cognitive functioning, particularly in the prefrontal cortex, improved significantly after sleep.
Conclusions:
- Hypnotic suggestions can effectively extend SWS in elderly individuals.
- This non-pharmacological approach may improve cognitive function in older adults.
- Hypnosis presents a potential alternative to sleep-enhancing medications for the elderly.
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