A COVID-19 survivors and close contacts EEG dataset
This manuscript presents a comprehensive dataset comprising resting-state and task-based EEG recordings from 173 participants, including 87 confirmed COVID-19 survivors and 86 healthy close contacts, who were also subjected to detailed physical, neurological, and clinical evaluations.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of a preprint that has not been peer-reviewed. It is not medical advice. Do not make health decisions based on this content. Read full disclaimer
The human brain is a vast, quiet landscape of electrical activity, constantly humming with signals that tell us how we think, feel, and move. To listen to this hum, scientists use a tool called an electroencephalogram, or EEG. This device places small sensors on the scalp to record the brain's electrical patterns, much like a microphone picks up sound waves. For decades, doctors have used these recordings to understand conditions like epilepsy or sleep disorders. But the recent global pandemic introduced a new, complex question: what happens to the brain's electrical hum after a person survives a viral infection? While the virus is known to affect the lungs, many survivors reported lingering fog, fatigue, and memory issues, suggesting the infection might leave a trace in the nervous system that is not immediately visible to the naked eye.
A team of researchers from Cuba and China set out to listen closely to this trace. They gathered a group of 173 people, all adults between the ages of 20 and 85, to see if they could find a difference in the brain waves of those who had recovered from the virus compared to those who had not. The group included 87 people who had been confirmed to have the virus through a standard medical test, and 86 healthy people who had lived in close contact with them but never tested positive. To ensure the results were clean and meaningful, the researchers carefully selected participants who had no history of neurological or psychiatric illness before they got sick, and who had been discharged from the hospital three to six months prior. This waiting period was crucial; it allowed the researchers to look for changes that remained long after the fever had broken, rather than just the immediate shock of the illness.
The study took place in a quiet room where each participant sat in a reclining chair. The goal was to capture the brain at rest, free from the distraction of solving puzzles or watching screens. For eight minutes, the volunteers sat with their eyes closed, letting their minds wander while the sensors recorded their brain's natural rhythm. The recording continued for another two minutes as they alternated between closing and opening their eyes, and finally for two more minutes of recovery. Alongside this electrical recording, the participants underwent a thorough check-up. They answered detailed questions about their physical health, their sleep, and any strange sensations they might have felt, such as trouble with balance or changes in taste and smell. They also sat down with specialists who used a structured interview to screen for any signs of anxiety, depression, or other mental health shifts.
Once the recordings were complete, the researchers faced the task of making the data safe for the public while keeping it useful. They used a specialized computer program to strip away all personal names and dates from the files, leaving only the age and gender of the participants, which are necessary for understanding brain patterns. They then organized the data into a standard format used by scientists worldwide, ensuring that anyone with the right tools could download and study the recordings. The final dataset includes the raw electrical signals, the notes made by expert neurophysiologists who manually checked the recordings to remove any glitches caused by blinking or movement, and the results of the health surveys. This collection serves as a detailed map of the brain's electrical state in the months following a viral recovery, offering a clear, concrete resource for other scientists to explore how the virus might have altered the brain's function in ways that standard medical exams might miss.
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