THE SENSE OF SMELL The nose is normally mistakenly assumed to be the organ of smell reception. It is not. The primary function of the nose is to regulate the temperature and humidity of inspired air, thereby protecting the delicate linings of the lungs. This is achieved by the breathed air passing through narrow passageways formed by three nasal turbinates in each nostril. The turbinates are covered by spongy vascular cells which can expand or contract to open or close the nasal pathways. The olfactory receptors, innervated by the 1st cranial nerve, are located at the top of the nose. There are about 50 million smell receptors in the human olfactory epithelia, the total size of which, in humans, is about that of a small postage stamp, with half being at the top of the left and half at the top of the right nostril. The receptive surfaces of olfactory cells are ciliated and extend into a covering layer of mucus. There is a constant turnover of olfactory cells. Their average active life has been estimated to be about 28 days.
This book aims to give health professionals a balanced and indepen dent overview of massage and aromatherapy. I have written it because, despite growing interest, there is a dearth of professional literature on this subject. This book aims to cover a number of topics which are under-represented in existing publications. These include: • scientific research in massage and aromatherapy; • the use of the therapies in medical settings; • the knowledge base of massage and aromatherapy; • professional and managerial issues; • safety. Understanding of these subjects is essential for any reasoned evalu ation of massage and aromatherapy. Yet this book is probably the first to provide information suitable for this task. At the current time of writing, almost all books on massage and aroma therapy have been written with the lay public in mind. The texts recommended to students and practitioners by the foremost schools and institutions are exactly the same as those available in health food shops as general introductions for prospective patients. Not surprisingly, such books generally fail to include in-depth discussions of professional issues.
THE SENSE OF SMELL The nose is normally mistakenly assumed to be the organ of smell reception. It is not. The primary function of the nose is to regulate the temperature and humidity of inspired air, thereby protecting the delicate linings of the lungs. This is achieved by the breathed air passing through narrow passageways formed by three nasal turbinates in each nostril. The turbinates are covered by spongy vascular cells which can expand or contract to open or close the nasal pathways. The olfactory receptors, innervated by the 1st cranial nerve, are located at the top of the nose. There are about 50 million smell receptors in the human olfactory epithelia, the total size of which, in humans, is about that of a small postage stamp, with half being at the top of the left and half at the top of the right nostril. The receptive surfaces of olfactory cells are ciliated and extend into a covering layer of mucus. There is a constant turnover of olfactory cells. Their average active life has been estimated to be about 28 days.
This book aims to give health professionals a balanced and indepen dent overview of massage and aromatherapy. I have written it because, despite growing interest, there is a dearth of professional literature on this subject. This book aims to cover a number of topics which are under-represented in existing publications. These include: • scientific research in massage and aromatherapy; • the use of the therapies in medical settings; • the knowledge base of massage and aromatherapy; • professional and managerial issues; • safety. Understanding of these subjects is essential for any reasoned evalu ation of massage and aromatherapy. Yet this book is probably the first to provide information suitable for this task. At the current time of writing, almost all books on massage and aroma therapy have been written with the lay public in mind. The texts recommended to students and practitioners by the foremost schools and institutions are exactly the same as those available in health food shops as general introductions for prospective patients. Not surprisingly, such books generally fail to include in-depth discussions of professional issues.
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