The role of sleep is currently widely recognized by the scientific community as a crucial element of human and animal cognitive functioning. At the basis of this apparently simple phenomenon, complex cerebral processes coexist that are capable of influencing psychological well-being and mental health. It is therefore relevant, within the field of psychology, to analyze the mechanisms regulating activity and emotional balance. In recent years, sleep research has progressively shifted from an anthropocentric approach, primarily based on EEG recordings, to the use of animal models that allow for a controlled analysis of the processes involved. Drosophila melanogaster represents a well-established experimental model, whose use originates from the work of Thomas Hunt Morgan and his school (Nobel Prize, 1933). This choice is particularly appropriate, as it has been observed that numerous fundamental dynamics of sleep are also present in this species, and that such aspects may therefore be considered evolutionarily conserved between invertebrates and vertebrates, originating from a common ancestor. This role of Drosophila is further supported by the pioneering research of Benzer and colleagues, which led to the identification of genes involved in circadian rhythms (clock genes; Nobel Prize, 2017). A related and currently growing line of research concerns the interest in natural substances capable of modulating arousal levels. Among these, lavender essence has been studied for its properties and for its use as a non-pharmacological support in the treatment of sleep disorders. The mechanisms through which this substance exerts its effects, however, are not yet fully understood. In light of these considerations, the present study aims to investigate the possible effects of lavender exposure on sleep in Drosophila melanogaster, framing the results within a psychologically relevant perspective for the interpretation of sleep disorders, particularly in relation to arousal regulation processes, and the mechanisms that promote their maintenance.
Il ruolo del sonno è ad oggi ampiamente riconosciuto dalla comunità scientifica come un elemento cruciale della sfera cognitiva umana ed animale. Alla base di questo fenomeno, apparentemente semplice, coesistono processi cerebrali complessi in grado di incidere sul benessere psicologico e sulla salute mentale. Risulta pertanto rilevante, in ambito psicologico, analizzarne i meccanismi di regolazione dell'attività e dell'equilibrio emotivo. Negli ultimi anni, la ricerca sul sonno è progressivamente passata da un approccio antropocentrico, basato soprattutto su registrazioni EEG, all’impiego di modelli animali utili a un’analisi controllata dei processi implicati. Drosophila melanogaster, rappresenta un modello sperimentale consolidato, il cui utilizzo parte dai lavori di Thomas Hunt Morgan e della sua scuola (Premio Nobel 1933). La scelta è particolarmente adeguata dal momento che è stato osservato come numerose dinamiche fondamentali del sonno risultino presenti anche in questa specie, e che dunque tali aspetti possano considerarsi evolutivamente conservati tra invertebrati e vertebrati a partire da un comune antenato. Questo ruolo della Drosophila è ulteriormente consolidato dalle ricerche pionieristiche di Benzer e collaboratori, che hanno permesso l’identificazione dei geni coinvolti nei ritmi circadiani (clock genes; Premio Nobel 2017) Una linea di ricerca correlata, ed oggi in crescita, riguarda l’interesse verso sostanze naturali in grado di modulare i livelli di arousal, tra queste, l’essenza di lavanda è oggetto di studio in merito alle sue proprietà e al suo utilizzo come supporto non farmacologico nel trattamento dei disturbi del sonno. Le modalità attraverso cui la sostanza agisca, tuttavia, non risultano ancora pienamente chiarite. Alla luce di queste considerazioni, il presente studio si propone di verificare i possibili effetti dell’esposizione alla lavanda sul sonno in Drosophila melanogaster, inquadrando i risultati in una prospettiva psicologica rilevante per l’interpretazione dei disturbi del sonno, in particolare in relazione ai processi di regolazione dell’arousal, e ai meccanismi che ne favoriscono il mantenimento.
Effetti di oli essenziali di Lavandula angustifolia (Lavandula) su sonno e arousal in Drosophila melanogaster (Moscerino della frutta)
CARRETTA, GIULIO
2025/2026
Abstract
The role of sleep is currently widely recognized by the scientific community as a crucial element of human and animal cognitive functioning. At the basis of this apparently simple phenomenon, complex cerebral processes coexist that are capable of influencing psychological well-being and mental health. It is therefore relevant, within the field of psychology, to analyze the mechanisms regulating activity and emotional balance. In recent years, sleep research has progressively shifted from an anthropocentric approach, primarily based on EEG recordings, to the use of animal models that allow for a controlled analysis of the processes involved. Drosophila melanogaster represents a well-established experimental model, whose use originates from the work of Thomas Hunt Morgan and his school (Nobel Prize, 1933). This choice is particularly appropriate, as it has been observed that numerous fundamental dynamics of sleep are also present in this species, and that such aspects may therefore be considered evolutionarily conserved between invertebrates and vertebrates, originating from a common ancestor. This role of Drosophila is further supported by the pioneering research of Benzer and colleagues, which led to the identification of genes involved in circadian rhythms (clock genes; Nobel Prize, 2017). A related and currently growing line of research concerns the interest in natural substances capable of modulating arousal levels. Among these, lavender essence has been studied for its properties and for its use as a non-pharmacological support in the treatment of sleep disorders. The mechanisms through which this substance exerts its effects, however, are not yet fully understood. In light of these considerations, the present study aims to investigate the possible effects of lavender exposure on sleep in Drosophila melanogaster, framing the results within a psychologically relevant perspective for the interpretation of sleep disorders, particularly in relation to arousal regulation processes, and the mechanisms that promote their maintenance.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/105073