Zusammenfassung
Der Artikel gibt einen Überblick über die Forschung zur Inkorporation von während des Schlaf applizierten externen Reizen in das Traumgeschehen. Der Vergleich der Inkorporationsraten zwischen den Studien legt 2 mögliche Einflussfaktoren auf die Integration externer Reize in den Traum nahe: „Körpernähe“ (Hautreiz wirksamer als akustischer Reiz) und Bedeutsamkeit des Stimulus. Eine Besonderheit stellen olfaktorische Reize dar, da sie kortikal anders verarbeitet werden als beispielsweise akustische Stimuli (Umgehung des Thalamus, direkte Verbindungen zur Amygdala). Tatsächlich zeigt sich in einer neueren Studie, dass die Traumemotionen, nicht jedoch der Trauminhalt, durch die Valenz des olfaktorischen Reizes beeinflusst werden. Die bisherige Forschung zeigt sehr klar, dass eine Informationsverarbeitung während des Schlafes stattfindet. Eine Fortführung dieser Forschungsrichtung wäre die Untersuchung von internen Reizen auf den Trauminhalt, z. B. Schmerzreize bei chronischen Schmerzpatienten oder Atemstillstände bei Schlafapnoe-Patienten.
Abstract
Research regarding the incorporation of external stimuli presented during sleep into dream content is reviewed. Comparing the incorporation rates between studies indicates two possible influencing factors on the integration of external stimuli into dreams: “physical closeness” (stimuli applied to the skin are more effective than acoustic stimuli) and the significance of the stimulus. Olfactory stimuli are special because their cortical processing differs from the processing of, for example, auditory stimuli (bypassing the thalamus, direct connections to the amygdala). A recent study indeed indicated that the valence of olfactory stimuli affected dream emotions but dream content was not altered. Overall, the studies clearly demonstrate that information processing during sleep takes place. To continue this branch of research, it would be interesting to study the effect of internal stimuli on dream content, e.g., pain in patients with chronic pain or breathing pauses in sleep apnea patients.
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Schredl, M., Stuck, B. Einfluss olfaktorischer Reize und Reize anderer Sinnesmodalitäten auf den Trauminhalt. Somnologie 13, 170–175 (2009). https://doi.org/10.1007/s11818-009-0417-5
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DOI: https://doi.org/10.1007/s11818-009-0417-5