Aromatherapy and Its Effects on Central Nervous System Function
Summary
Aromatherapy employs volatile plant-derived compounds, commonly known as essential oils, to influence physiological and psychological processes via olfactory and peripheral pathways. Inhalation or topical application of these oils engages the olfactory epithelium and transmits signals through the olfactory bulb to limbic structures such as the amygdala, hippocampus and anterior cingulate cortex. Through modulation of neurotransmitter systems—including GABAergic, glutamatergic and serotonergic circuits—aromatherapy has been shown to evoke anxiolytic, antidepressant, sedative and neuroprotective effects. Emerging evidence also points to interactions with voltage-dependent calcium channels, oxidative stress pathways and neuroinflammatory mediators. Practical applications span the management of stress, enhancement of cognitive performance, adjunctive care in neurodegenerative conditions and support during anaesthetic procedures. While preclinical studies offer mechanistic insight and small clinical trials report beneficial effects on mood, autonomic function and electroencephalographic patterns, standardisation of oil composition, delivery methods and rigorous large-scale trials remain necessary. Globally, aromatherapy is valued for its accessibility, cultural resonance and potential to bridge conventional and complementary approaches to mental health and wellbeing.
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Aromatherapy and Its Effects on Central Nervous System Function publication trend
The graph below shows the total number of articles in aromatherapy and its effects on central nervous system function across all publications each year (not limited to Nature Index journals).
Technical terms
Essential oil: A concentrated mixture of volatile plant constituents extracted by distillation or cold pressing, used for therapeutic or aromatic purposes.
Olfactory system: The sensory apparatus comprising receptor neurons, the olfactory bulb and higher brain regions responsible for detecting and processing odours.
GABAergic neuron: A nerve cell that releases γ-aminobutyric acid as its primary inhibitory neurotransmitter, reducing neural excitability.
Glutamatergic neuron: A nerve cell that releases glutamate as its main excitatory neurotransmitter, facilitating synaptic activation.
Ca2+ influx: The movement of calcium ions into cells through specialised channels, crucial for neuronal signalling and synaptic plasticity.
Anxiolytic: A compound or intervention that reduces anxiety and associated behavioural or physiological manifestations.
References
- A Neural Circuit For Bergamot Essential Oil‐Induced Anxiolytic Effects. Advanced Science (2024).
- Lavandula angustifolia Mill. inhibits high glucose and nicotine-induced Ca2+ influx in microglia and neuron-like cells via two distinct mechanisms. Biomedicine & Pharmacotherapy (2024).
- Effects of essential oils on central nervous system: Focus on mental health. Phytotherapy Research (2020).
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