Processes pronunciation as process iz4/25/2023 ![]() Fragrance is a volatile chemical component with a molecular weight of <300 Da that humans perceive via the olfactory system. In our daily life, several fragrances appear and a sense of smell plays an important role in the physiological effects of mood, stress, and working capacity. There are various methods available to administer the fragrances in small quantities, including inhalation, massage or simple applications on the skin surface and, sometimes, they can be taken internally. In recent years, various studies have revealed that olfactory stimulation through fragrance inhalation exerts various psychophysiological effects on human beings. In traditional medicine as well as in aromatherapy and herbal medicine, essential oils and fragrance compounds have been used for the treatments of various psychological and physical disorders such as headaches, pain, insomnia, eczema, stress-induced anxiety, depression and digestive problems. Many ancient civilizations, including Egypt, China and India, have used aromatherapy as a popular complementary and alternative therapy for more than thousands of years. The aromatherapy treatment is a natural way of healing a person’s mind, body and soul. In aromatherapy, fragrance substances (aroma/odor/scent) from various natural sources have been used for the treatment of various disorders. The aroma components from natural products have been used for mental, spiritual and physical healing since the beginning of recorded history. This review aims to evaluate the available literature regarding the influence of fragrances on the psychophysiological activities of humans with special reference to EEG changes. The studies have suggested a significant role for olfactory stimulation in the alteration of cognition, mood, and social behavior. In the last few decades, many scientific studies were conducted to investigate the effect of inhalation of aroma on human brain functions. It is well known that decreases of alpha and beta activities and increases of delta and theta activities are associated with brain pathology and general cognitive decline. ![]() A quantitative EEG uses computer software to provide the topographic mapping of the brain activity in frontal, temporal, parietal and occipital brain regions. The EEG power spectrum is classified into different frequency bands such as delta (0.5–4 Hz), theta (4–8 Hz), alpha (8–13 Hz), beta (13–30 Hz) and gamma (30–50 Hz), and each band is correlated with different features of brain states. The EEG is a good temporal measure of responses in the central nervous system and it provides information about the physiological state of the brain both in health and disease. Electrophysiological studies have revealed that various fragrances affected spontaneous brain activities and cognitive functions, which are measured by an electroencephalograph (EEG). The sense of smell plays an important role in the physiological effects of mood, stress, and working capacity. In humans, about 300 active olfactory receptor genes are devoted to detecting thousands of different fragrance molecules through a large family of olfactory receptors of a diverse protein sequence. ![]() A fragrance consists of volatile chemicals with a molecular weight of less than 300 Da that humans perceive through the olfactory system. Recent years have seen the increasing popularity of an ( -ˌiz ) pronunciation for processes, perhaps by mistaken analogy with such plurals as theses and hypotheses, with which it has no connection.The influence of fragrances such as perfumes and room fresheners on the psychophysiological activities of humans has been known for a long time, and its significance is gradually increasing in the medicinal and cosmetic industries. This plural, as in similar words like recesses and successes, has traditionally been pronounced ( -ɪz ): ( ˈprɑsesɪz ), ( ˈprousesɪz ) or ( ˈprɑsəsɪz ), ( ˈprousəsɪz ). USAGE The word process, an early 14th century French borrowing, has a regularly formed plural that adds Records of the occasion: Proceedings of the Royal Academy of Sciences. proceeding (usually pl.) applies to what goes on or takes place on a given occasion or to the procedure usually implies a formal or set order of doing a thing, a method of conducting affairs: A process is a series of progressive and interdependent steps by which an end is attained:Ī chemical process. process, procedure, proceeding apply to something that goes on or takes place. A moving background on a process screen SYNONYMS 1.
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