Alzheimer's is a neurodegenerative disease that develops slowly. The first signs are more subtle, like memory lapses or trouble completing tasks.
However, researchers have identified another sign that may be an indication to seek medical help. In addition, it is common in everyday activities such as bathing.
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The study carried out at the University of Chicago was dedicated to observing the Alzheimer's development and its stages.
During the analyses, the researchers identified a little observed symptom that appears as an indication of a neurodegenerative disease.
According to the Brazilian Alzheimer's Association (ABRAz), Brazil has about 1.2 million people with the problem, but many have not yet been diagnosed.
In the world, the number of people with the disease of Alzheimer's is approximately 35.6 million.
Due to the significant presence of the disease, scientists have dedicated themselves to researching new strategies that speed up early diagnosis and treatment.
In this way, they identified an Alzheimer's symptom that is present in one of our very routinely used senses: smell.
It is an important sense in the way we experience the world. Therefore, it is essential to observe in everyday situations that the olfactory perception is not being lost quickly.
For example, the ability to perceive conditioner, soap and shampoo smells while showering. The same exercise can be carried out in other environments, such as the kitchen and food aromas.
Such a primary observation of rapid decline in smell may facilitate investigation of the cause and early diagnosis of Alzheimer's.
In case of doubts or perception of this sign, the best guidance is to seek medical attention and carry out the necessary tests indicated by health professionals.
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The tests were carried out on 515 adults living in homes for the elderly in Illinois, in the United States.
Since 1997, this group of people has been tested annually for their ability to "odor identification, cognitive function and clinical diagnosis of dementia." A portion of the individuals also underwent magnetic resonance imaging to maintain follow-up.
According to research, the loss of smell is an indication of dementia, even more so when associated with the ability to recognize different smells.
"This study provides another clue as to how a rapid decline in the sense of smell is a good predictor of what will eventually occur structurally in specific brain regions," said Jayant M. Pinto, a professor at the University of Chicago.
Furthermore, the decline in smell predicts loss of cognitive function and changes in the brain at different points affected by Alzheimer's disease.
