mention any two examples to show that brain injury can result in the loss of sense of smell and taste
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As air enters the nose, it triggers certain nerves. These nerves bring information to a part of the brain called the olfactory bulb. That information then goes to the part of the brain that creates our sense of smell. Loss of smell may result from damage to the lining of the nose or nasal passages (diagram A). Other causes may be injury to the nerve that carries smell sensation from the nose to the brain (olfactory nerve, diagram B) or harm to parts of the brain that process smell (diagram C). Other possible causes are infections, toxins, and medicines.
Three diagrams. Diagram A shows the nasal passages leading to the nasal cavity in the nose. Diagram B shows the olfactory nerve, passing from its receptors in the nasal mucosa to the forebrain. Diagram C shows the olfactory centers in the temporal lobe of the brain.
Smell and taste are part of an overlapping sensory system. "Flavor" comes almost entirely from the nose. Smell and taste are directly related because they both trigger the same nerves. Taste receptors on the tongue and nerves in the nose work together to tell us about the air we breathe and the food we eat.
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