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A Q&A with Bonnie Blodgett, Author of Remembering Smell
Q: What inspired you to write a memoir about smell?
A: A series of unfortunate events. In the fall of 2005, my nose stopped working. I'd inhaled a zinc-based gel called Zicam to prevent a cold. The cold was unfazed, and I spent a week stuffed up and miserable. A week later I noticed a funny smell. Soon I was overwhelmed by unaccountable odors, unfortunately all of them vile. Imagine a blend of rotten eggs, dead fish, feces, and burning flesh. Versions of these odors came and went, but the smell never left.Q: You mean it never faded?A: Unfortunately, no. The brain has a mechanism that tunes out smells after a fairly short exposure. That's why we can't smell our own perfume. I knew something was seriously wrong because they were constant. The fade button had gone on the blink. Naturally, my first thought was that I was just imagining it. Maybe I was going mad.Q: How did you find out what was going on?A: An ear, nose, and throat specialist knew immediately that the odors were olfactory hallucinations. I wasn't making them up, my brain was. He prescribed an old-fashioned antidepressant that would trick my brain into letting up on the odiferous onslaught.Q: What actually happens inside the nose?A: The cells begin to divide, making new ones. Olfactory neurons are the only brain cells capable of regenerating the way other nerves in the body do. Recently scientists have shown that neurons deep in the brain can repair themselves, but the process is circuitous and not well understood. Interestingly, the route that cells take is from the olfactory bulb to the rest of the limbic system and then to the other brain regions, by way of so-called exit ramps off what scientists have taken to calling the cell superhighway. If we can figure out how this works, we might be able to send stem cells we've designed for specific purposes into damaged brain areas and jump- start the healing process.Q: How long does it typically take for olfactory cells to heal?A: Full recovery (if recovery occurs) usually takes anywhere from three months to a year, depending on the situation. Anosmia caused when the brain suddenly shifts inside the skull--this is what happens with head injuries--severing the long nerves leading from the receptor sheet to the olfactory bulb, is often permanent. Anosmia resulting from an infection typically takes three to six months to resolve itself, if it does. People who lost their sense of smell after taking Zicam have had mixed results. Most were not as lucky as I was.(Photo Ann Marsden)