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Wednesday, December 07, 2022

A study links loss of smell or taste after covid with the imminent presence of memory problems

A study published in the scientific journal European archives of psychiatry and clinical neuroscience found a link between Loss of smell or taste after passing COVID-19 Thief memory problems.

Studies conducted before the COVID-19 pandemic suggest a lack of smell may An early sign of the impending onset of Alzheimer’s disease.

There is evidence in the scientific literature that this sensory disorder may manifest years before the first cognitive symptomssuggesting a link between brain regions responsible for memory and the interpretation of olfactory stimuli.

In this new work a group of Brazilian researchers analyzed Clinical data of 701 patients Treated for moderate or severe COVID-19 at Hospital Das Clinic between March and August 2020.


A Worker In The Covid Icu Of Val D'Hebron Hospital In Barcelona.

smell disorder

Evaluation conducted six months after hospital discharge showed that patients with the most severe taste and smell disorders after COVID-19 achieved this poor results in cognitive tests, Particularly when these involved memory, and that the test results were not related to the severity of their condition in the acute phase of the disease.

“Smell is an important link with the outside world and is closely related to past experiences”

“The Smell is an important link to the outside world and is closely related to past experiences. For example, the smell of cake may evoke memories of a grandmother. In terms of brain connections, smell interacts more strongly with memory than sight and hearing,” says otorhinolaryngologist Fabio Pinna, final author of the article that collected the study.

The median hospital stay for the entire group of patients studied was 17.6 days. Their average age was 55.3 years, More than half (52.4%) were male. A slightly higher proportion (56.4%) required intensive care for disease complications, and just one third (37.4%) were intubated.


Monkey Pox.

Odor and taste rated six months after discharge from hospital The first for this type of study was through standardized questionnaires and also included aspects related to quality of life.

Moderate or severe taste deficit (loss of sense of taste) was the most frequent sensory complication (20%), followed by moderate or severe olfactory deficit (18%), moderate or severe deficit in both smell and taste (11%), and Parosmia (9%), which is a distortion of olfactory perception, so that an odor previously enjoyed becomes unpleasant, eg.

olfactory hallucinations

up to 12 of the participants reported having olfactory hallucinations (odor unknown to others) and nine taste hallucinations (experiencing a taste without having eaten anything). In both cases, the majority said the hallucinations occurred only after suffering from COVID-19. In response to a question about their general health status, 10.1 percent chose poor or very poor, 38.5 percent chose fair, and 51.4 percent chose good or very good.


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investigated psychotic symptoms such as anxiety and depressionNeuropsychological tests were also implemented, through standardized questionnaires, and to measure cognitive functions such as memory, attention, and reasoning speed.

Finally, statistical techniques were used to analyze all results in order to detect correlations between Neuropsychiatric symptoms and sensory dysfunction.

impaired memory

Subjects reporting parosmia were found to have more memory problems than others, while those with moderate or severe taste deficits performed significantly worse on a test used to assess episodic memory and attention. Those who reported moderate or severe loss of both smell and taste were also found to have significantly impaired episodic memory.

“we have not got no psychotic symptoms [como la ansiedad o la depresión] This was associated with loss of smell and taste, but as expected, we observed that patients with greater chemosensitivity changes had more impaired attention and contextual memory.

This finding supports the hypothesis that COVID affects cognitionAnd that there are not only psychosocial or environmental causes of damage in this area”, details the article’s first author Rodolfo Damiano.

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