ANOSMIA comes from the Greek; an [no] - osmia [smell].
Of the five senses, smell ranks fourth in importance for humans, although it is much more pronounced in other animals. Taste, considered the fifth sense, is mostly the smell of food in the mouth.
The sense of smell originates from the first cranial nerves (the olfactory nerves). A small area on the mucous membrane that lines the nose (the olfactory epithelium) contains specialized nerve cells called smell receptors.
The sense of smell originates from the first cranial nerves (the olfactory nerves). A small area on the mucous membrane that lines the nose (the olfactory epithelium) contains specialized nerve cells called smell receptors.
These receptors have hair like projections (cilia) that detect odors. Airborne molecules entering the nasal passage stimulate the cilia, triggering a nerve impulse in nearby nerve fibers. The fibers extend upward through the bone that forms the roof of the nasal cavity ( cribriform plate) and connect to enlargements of nerve cells (olfactory bulbs) that form the cranial nerves of smell (olfactory nerves). The impulse travels through the olfactory bulbs, along the olfactory nerves, to the brain. The brain interprets the impulse as a distinct odor. Also, the area of the brain where memories of odors are stored —the middle part of the temporal lobe —is stimulated. The memories enable a person to distinguish and identify many different odors experienced over a lifetime.
A reduced ability to smell ( hyposmia) and loss of smell ( anosmia) are the most common disorders of smell and taste. Because distinguishing one flavor from another is based largely on smell, people often first notice that their ability to smell is reduced when their food seems tasteless.
By Ayurpatra - Ayurveda India
The sense of smell originates from the first cranial nerves (the olfactory nerves). A small area on the mucous membrane that lines the nose (the olfactory epithelium) contains specialized nerve cells called smell receptors.
These receptors have hair like projections (cilia) that detect odors. Airborne molecules entering the nasal passage stimulate the cilia, triggering a nerve impulse in nearby nerve fibers. The fibers extend upward through the bone that forms the roof of the nasal cavity ( cribriform plate) and connect to enlargements of nerve cells (olfactory bulbs) that form the cranial nerves of smell (olfactory nerves). The impulse travels through the olfactory bulbs, along the olfactory nerves, to the brain. The brain interprets the impulse as a distinct odor. Also, the area of the brain where memories of odors are stored —the middle part of the temporal lobe —is stimulated. The memories enable a person to distinguish and identify many different odors experienced over a lifetime.
A reduced ability to smell ( hyposmia) and loss of smell ( anosmia) are the most common disorders of smell and taste. Because distinguishing one flavor from another is based largely on smell, people often first notice that their ability to smell is reduced when their food seems tasteless.
By Ayurpatra - Ayurveda India
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