Do You Think You Have High Alcohol Tolerance? Here’s How Liquor Impacts Your Brain Activity

Updated Aug 9, 2024 | 03:00 PM IST

SummaryA recent research sheds light on social drinkers and how even moderate alcohol consumption can impact brain activity, challenging the notion that occasional drinking is harmless.
Liquor Impacting Brain Activity (Credit-Freepik)

Liquor Impacting Brain Activity (Credit-Freepik)

Many of us believe that we are great drinkers and that alcohol does not affect us as much. People who are able to drink without showing any sign of inebriation are known as social drinkers. In short, they are not addicted to alcohol but will not turn down the opportunity to have a good time! While it may seem like it doesn’t affect you, new studies suggest that it is just an illusion, even if you have high tolerance, alcohol affects your cognitive and motor functions more than you think.

The study reveals the below implications and techniques:

  • Researchers used a new MRI technique to precisely measure brain electrical activity.
  • By comparing brain scans before and after drinking, scientists identified specific areas affected by alcohol and how much brain activity slowed down.
  • Participants were chosen to be regular social drinkers without alcohol addiction, ensuring the study focused on the effects of alcohol alone.
  • MRI technology provided reliable data on brain activity changes caused by alcohol consumption.

How does the brain react to alcohol?

The human brain is a complex network of billions of neurons that communicate through electrical impulses. Brain conductivity refers to the efficiency with which these electrical signals travel through brain tissue. It's akin to the speed and clarity of a digital signal through a wire. In layman terms, your brain must function in its peak condition as it is essential for various cognitive processes, including memory, attention, decision-making, and motor control.

Think of it as the foundation for your brain's performance. When brain conductivity is high, information flows smoothly, and that helps your brain in rapid processing and response. On the other hand, low conductivity can hinder cognitive function, leading to slower thinking, impaired memory, and difficulties with coordination.

A study conducted at the Neuroscience Research Australia (NeuRA) and UNSW Science unveiled a startling connection between alcohol consumption and brain conductivity.

What is the connection between alcohol consumption and brain activity?

While many people brush off the effects of alcohol as temporary changes in behaviour, the reality is much more complex. Beyond the obvious impacts on coordination and judgment, alcohol significantly alters brain function. Alcohol dramatically slowed down brain activity, especially in areas responsible for decision-making, planning, and physical coordination. This decline was so significant that it resembled the brain changes seen in normal ageing. This means even one drink could temporarily accelerate the ageing process of your brain.

Alcohol and Brain activity: What does the study Imply?

The implications of this research are far-reaching. It provides compelling evidence that alcohol consumption has a direct and measurable impact on brain function. The discovery that alcohol can significantly reduce brain conductivity opens new avenues for understanding the neurocognitive effects of alcohol abuse and dependence. While you may not feel like alcohol is affecting you and you have a high tolerance, it most definitely changes and affects your decision-making abilities and impulse control.

Furthermore, the MRI technique employed in the study could be a valuable tool for assessing the impact of other substances on the brain and for developing interventions to mitigate alcohol-related brain damage.

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Ebola Scare In Bengaluru After Uganda-Returned Woman Develops Symptoms

Updated May 26, 2026 | 11:36 PM IST

SummaryThe woman who arrived in Bengaluru on May 23 from Kampala, Uganda, was suspected of Ebola infection after developing mild symptoms, including body aches. Her blood samples and other required specimens have been sent to the Pune lab. The results are expected on May 27.
Ebola Scare In Bengaluru After Uganda-Returned Woman Develops Symptoms

Credit: AI generated image

India's southern state of Karnataka has reported a suspected case of Ebola Virus Disease (EVD) in a 28-year-old woman who returned from Uganda, which is currently experiencing an Ebola outbreak.

The woman who arrived in Bengaluru from Kampala, Uganda, on May 23, was suspected of infection after developing mild symptoms, including body ache, health officials said..

She was shifted from a hotel to the state-run Epidemic Diseases Hospital on May 26, 2026, according to The Hindu. Her test results are awaited.

Her blood samples and other required specimens were collected today and sent to a specialized laboratory in Pune for detailed testing. Health department officials are currently awaiting the medical report, which is expected by Wednesday.

Authorities said only after the laboratory results arrive can it be officially confirmed whether the woman is infected with the Ebola virus.

Ebola Virus Disease has caused over 900 cases and more than 200 deaths in the Democratic Republic of the Congo and Uganda, as per the World Health Organization (WHO). According to the WHO chief, Tedros Adhanom Ghebreyesus. The global health agency has also determined that the deadly outbreak is a “Public Health Emergency of International Concern (PHEIC)”.

“With air travel being common and the outbreak already having spread to multiple countries in Africa, it is entirely possible for someone who had contact with a person with Ebola virus disease to get on a flight to another country,” Dr. Rajeev Jayadevan, Co-Chairman of the National IMA COVID Task Force and Past President of the Indian Medical Association, Cochin, told HealthandMe.

“All patients with Ebola disease may not know they have it — as the initial symptoms are nonspecific such as fever and body ache. In addition, scarcity of the exact PCR test to diagnose the latest Bundibugyo Ebola virus in Africa makes it possible to miss it entirely,” he added.

India’s Preparedness

The suspected case comes as India has been ramping up screening and surveillance measures across the country, especially at airports and seaports.

Recently, the Karnataka government also issued guidelines for passengers arriving from Ebola-affected countries. As part of the precautionary measures, travelers entering Bengaluru from such nations are required to undergo a 21-day quarantine period.

People showing symptoms have been advised to immediately report to the nearest hospital. The Health Department has also directed strict surveillance and monitoring of suspected cases under the Integrated Disease Surveillance Programme (IDSP).

Also read: WHO Chief Warns Ebola Epidemic ‘Outpacing Us’; India Intensifies Screening At Airports

Officials have strengthened coordination at airports and other entry points to monitor international passengers. Separate quarantine and isolation facilities, along with referral ambulance services, have also been kept ready.

The Health Department has additionally instructed hospitals to enhance infection-control measures and provide special training to healthcare workers to handle any possible emergency situation.

The country has also issued a travel advisory for citizens to avoid non-essential travel to the Democratic Republic of the Congo, Uganda, and South Sudan.

How Ebola Spreads

Ebola spreads through:

  • Direct contact with infected blood or bodily fluids
  • Contact with contaminated surfaces or medical equipment
  • Unsafe caregiving exposure
  • Traditional burial practices involving direct contact
  • Certain zoonotic animal exposures.
Symptoms to Watch For includes:
  • fever,
  • weakness,
  • headache,
  • muscle pain,
  • vomiting,
  • diarrhea,
  • sore throat,
  • unexplained bleeding.

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Shingles After COVID-19 Linked To Higher Risk Of Bell's Palsy, Guillain-Barré Syndrome: Study

Updated May 26, 2026 | 10:00 PM IST

SummaryThe study suggests that post-COVID shingles may serve as a clinically relevant marker of neuro-immunological vulnerability, particularly among individuals with metabolic comorbidities.
Shingles After COVID-19 Linked To Higher Risk Of Bell's Palsy, Guillain-Barré Syndrome: Study

Credit: AI generated image

People suffering from shingles after COVID-19 infection may be at a higher risk of neurological conditions such as Bell’s palsy, Guillain-Barré syndrome (GBS), as well as Myasthenia gravis (MG), according to a large study.

Shingles (also known as herpes zoster) is a painful condition caused by the varicella zoster virus that lives in the nervous system of people who have had chicken pox.

The study, led by researchers from Taiwan and Australia, showed that Bell’s palsy risk increased early after shingles. At the same time, GBS and MG showed delayed increases emerging more than a year later.

GBS, Bell’s palsy, and MG are all neurological conditions that cause muscle weakness, but they affect different parts of the nervous system. While GBS and MG cause widespread muscle weakness, Bell’s palsy is strictly localized to the face.

The findings, published in International Journal of Medical Sciences, highlighted “the need for symptom-based neurological awareness during both early and delayed post-infectious periods,” the researchers said.

What Did The Study Find?

Also read: ‘Heat Dome’ Triggering Record-Breaking May Temperatures In France, UK, Spain

During the COVID-19 pandemic, shingles was reported to occur in people with COVID-19 and in COVID-19 vaccine recipients; shingles vaccination programs were also disrupted.

The increased incidence of shingles following COVID-19 suggests a period of immune dysregulation, but the associated long-term neuro-immunological risks remain unclear.

To better understand this, researchers from Taipei Tzu Chi Hospital and Queensland University of Technology used electronic health records and compared COVID-19 survivors with individuals with and without shingles reactivation over a three-year follow-up period.

The results showed that shingles reactivation after COVID-19 was associated with a significantly increased three-year risk of several neurological disorders.

  • The risk of Bell’s palsy increased early and remained consistently elevated throughout the study period.
  • Patients showed more than three times the risk compared to those without herpes reactivation.
  • The risks of GBS and MG also increased, although these associations appeared later, emerging after the first year of follow-up.

The study suggests that post-COVID shingles "may serve as a clinically relevant marker of neuro-immunological vulnerability, particularly among individuals with metabolic comorbidities", the team said.

Importantly, the researchers noted that "COVID-19 vaccination was not linked to an increased risk of these neurological outcomes".

US FDA Blocked Study Showing COVID And Shingles Vaccines Are Safe

Read More: Donald Trump To Undergo 3rd Annual Medical Check-up Today

Meanwhile, in recent news, officials at the US Food and Drug Administration (FDA) blocked the publication of several studies supporting the safety of widely used vaccines against COVID-19 and shingles in recent months, according to a spokesman for the Department of Health and Human Services (HHS).

While the studies found serious side effects to be very rare, the HHS said they were pulled over concerns about their conclusions. These withdrawals aim to limit access to vaccines, reflecting broader policy changes under US Health Secretary Robert F. Kennedy Jr., a staunch critic of vaccines.

“The studies were withdrawn because the authors drew broad conclusions that were not supported by the underlying data. The FDA acted to protect the integrity of its scientific process and ensure that any work associated with the agency meets its high standards,” said Andrew Nixon, a spokesman for the HHS, which oversees the FDA, in an email to Reuters.

“The design of that study fell outside the agency’s purview,” Nixon said on rejecting the shingles vaccine.

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Why Ebola Outbreaks Keep Returning In Africa? | Explained

Updated May 26, 2026 | 09:00 PM IST

SummaryHuman-animal interaction, poverty and lack of food security, weak healthcare systems, traditional burial practices, and limited diagnostic facilities are some of the key reasons behind the resurgence of Ebola in Africa
Why Ebola Outbreaks Keep Returning In Africa? | Explained

Credit: AI generated image

Ebola is a highly lethal viral hemorrhagic fever first identified in 1976. Over the last five decades, it has caused more than 30 localized and widespread outbreaks, primarily in Central and West Africa. The virus takes its name from the Ebola River in the Democratic Republic of the Congo (DRC).

Three strains of the virus — Ebola virus, Sudan virus, and Bundibugyo virus — have caused the largest outbreaks in Africa. Among them, the Ebola virus is considered the deadliest, with fatality rates reaching up to 90% without treatment.

The latest outbreak, caused by the Bundibugyo virus, is also highly dangerous, carrying a mortality rate of around 50%. Experts warn that the situation is more concerning because there is currently neither a vaccine nor a proven antiviral treatment specifically for this strain.

These viruses have repeatedly emerged from animal reservoirs and infected humans across several African countries. In the Democratic Republic of the Congo alone, this marks the 17th Ebola outbreak and the third linked to the Bundibugyo strain. So far over 900 cases have been reported from DR Congo and Uganda. The deaths due to the virus has also crossed 200.

Why Ebola Outbreaks Keep Returning In Africa? | Explained

But what actually is behind the periodic recurrence? HealthandMe spoke to two experts, who flagged several factors driving repeated Ebola outbreaks, including:

  • Human-animal interaction
  • Poverty and lack of food security
  • Weak healthcare systems
  • Traditional burial practices
  • Limited diagnostic facilities

Human-Animal Spillover

Why Ebola Outbreaks Keep Returning In Africa? | Explained

Dr Rajeev Jayadevan, Co-Chairman of the National IMA COVID Task Force and Past President of the Indian Medical Association, Cochin, explained that Ebola is a zoonotic disease — meaning it spreads from animals to humans, similar to rabies, Nipah virus, and bird flu. He noted that the root of an outbreak is often an animal to human spillover event.

"All of these Ebola outbreaks are eventually tracked back to a spillover and the spillover is believed to be human-animal interaction as in bushmeat trading. These are impoverished areas of Africa which are also conflict-ridden and also short of medical facilities for many reasons, economically backward,” he told HealthandMe, adding that civil unrest often results in shortages of healthcare workers, medical supplies, and access to treatment.

He noted that bushmeat remains a major food source for many communities living in forested regions, where animals such as bats, monkeys, and apes are hunted for survival, because of widespread poverty and food insecurity.

Dr Subramanian Swaminathan, Director of Infectious Disease at Gleneagles Hospital in Chennai, added that this ability of the virus to skip from one group of animals to another entire species has happened again and this probably is because of humans venturing out into the forest and the bushmeat trade.

Why Ebola Spreads Quickly In Communities

The experts noted that Ebola spreads through direct contact with bodily fluids of infected individuals. Caregivers, family members, and healthcare workers are therefore among the groups at highest risk.

Dr Rajeev pointed out that traditional burial practices in some affected regions continue to contribute to transmission. In many communities, relatives physically wash or touch the bodies of the deceased as a sign of respect and affection.

He noted that health organizations have tried for years to educate communities about safer burial practices, but long-standing customs and social pressure often make behavioral change difficult. In some cases, refusing to touch the body of a deceased family member may be seen as disrespectful, forcing relatives into risky contact with infected bodies.

"There are many forces at play here. conflict, war, ignorance, poverty, lack of food, distrust of health care facilities, customs and beliefs that refuse to go away. These are dangerous. And so it's a difficult situation for these people," the expert told HealthandMe.

Diagnostic Challenges With Bundibugyo Strain

Another major concern is the lack of reliable diagnostic facilities for the Bundibugyo strain. Dr Rajeev explained that test kits designed for the Zaire strain may fail to detect Bundibugyo infections, causing infected individuals to test negative and continue spreading the virus unknowingly.

Dr. Subramanian said the current outbreak strain appears to be genetically different from previous Bundibugyo outbreaks.

“This is not the Bundibugyo variants which have caused outbreaks in the past, this is completely new,” he told HealthandMe. added that genomic sequencing suggests the virus may have crossed from animals to humans again due to increasing human activity in forest regions and bushmeat exposure.

Why Ebola Is Considered So Dangerous

Dr. Subramanian described Ebola as one of the world’s most feared infectious diseases because mortality rates can range from 50% to 80%, depending on the strain.

He explained that symptoms initially appear non-specific, including fever, respiratory symptoms, body ache, and diarrhea, before progressing to severe internal bleeding and multi-organ complications in many patients.

Although Ebola does not spread through casual airborne contact like COVID-19, it spreads efficiently through secretions and bodily fluids, making caregivers and healthcare providers particularly vulnerable. Religious and funeral gatherings can also become amplification points for transmission.

Dr. Subramanian added that there is currently no “perfect treatment” for Ebola. While monoclonal antibodies are still being studied, treatment largely remains supportive and focused on symptom management, infection control, and preventing transmission.

Travel Precautions And Global Risk

The expert advised people to avoid travel to outbreak-hit areas in Zaire and Uganda, particularly border regions. Those who must travel should take strict precautions, while travelers returning from affected areas should remain under observation and quarantine if necessary.

He also urged the public to closely follow updates from scientific organizations such as the World Health Organization (WHO).

However, Dr. Subramanian stressed that Ebola is unlikely to become a global public health crisis on the scale of COVID-19 because it does not spread through airborne transmission.

“It’s more likely to cause a lot of disruption in a small area,” he said. “As of right now there’s really no cause for alarm but there is cause for concern.”

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