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Published on: Apr 30, 2022
2 minute read
By: Second Medic Expert

What Is MRI Scan ?

MRI (magnetic resonance imaging) is a medical imaging technique used to visualize internal body structures. MRI uses a strong magnetic field and radio waves to create detailed images of the organs and tissues within the body. MRI scans are commonly used to diagnose tumors, injuries, and other diseases. They can also be used to evaluate the health of the brain, heart, liver, kidneys, and other organs.

MRI scan is an abbreviation for Magnetic Resonance Imaging, which is a diagnostic medical imaging technique used to image tissues and organs in the body. MRI uses a strong magnetic field and radiofrequency pulses to create images of the body. These images can be used to diagnose or monitor a range of medical conditions. MRI (magnetic resonance imaging) is a diagnostic test that uses a strong magnetic field and radio waves to produce detailed images of the organs and tissues within your body. An MRI scanner creates a three-dimensional image of the inside of your body.

MRI is used to help diagnose diseases, conditions, or injuries. It can also be used to help plan treatments. MRI can show problems that may not be seen on other types of scans such as X-rays or CT scans. MRI (Magnetic Resonance Imaging) is a medical imaging technique used to visualize internal structures of the body in detail. It does this by using strong magnetic fields and radiofrequency pulses to induce tiny electric currents in the body, which can be detected and converted into images. MRI is particularly good at visualizing soft tissues such as muscles, tendons, and ligaments, and can be used to detect abnormalities or damage.

MRI stands for Magnetic Resonance Imaging. It is a technology used to generate images of the inside of the body. It does this by using a strong magnetic field and pulses of radio waves to create pictures of the body's organs and tissues. MRI scans are used to diagnose medical conditions and to assess how well treatments are working. They are also used in research to study the structure and function of the body's organs and tissues. MRI (magnetic resonance imaging) is a medical imaging technique used to produce clear images of the inside of the body. It does this by using a large, powerful magnet and radio waves to create detailed pictures of organs, tissues, and other structures inside the body. MRI scans are painless and usually take less than 30 minutes to complete.

It's a medical scan that uses powerful magnets and a computer to create images of the inside of the body. MRI scans are often used to look at the brain, spinal cord, joints, and internal organs. They're also used to diagnose tumors and injuries. MRI Scan is a type of medical imaging that uses powerful magnets and radio waves to create images of the inside of the body. It can be used to diagnose a wide range of conditions, including tumors, internal bleeding, and joint problems. MRI scans are usually painless, though some people may feel claustrophobic in the small space inside the scanner. They are also very safe and produce clear images without using any radiation.

MRI scan is a medical imaging technique used to visualize internal structures of the body in detail. It relies on the principles of nuclear magnetic resonance and produces a three-dimensional image of the inside of the body. MRI scans are non-invasive and can be used to diagnose a variety of conditions.

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How Lack of Sleep Weakens Immunity: Why Poor Sleep Makes You Fall Sick More Often

Sleep is one of the most powerful yet overlooked pillars of health. While nutrition and exercise receive significant attention, sleep often takes a back seat in modern lifestyles. Understanding how lack of sleep weakens immunity reveals why people who sleep poorly fall sick more often, take longer to recover and experience chronic inflammation.

In India, late-night work culture, excessive screen time and irregular schedules have made sleep deprivation increasingly common across age groups.

The Link Between Sleep and the Immune System

The immune system relies on sleep for:

repair and regeneration
immune cell production
inflammation control

During deep sleep, the body releases cytokines and antibodies that protect against infections.

What Happens to Immunity During Sleep

While sleeping:

immune cells identify pathogens
inflammatory responses are regulated
memory T-cells strengthen immune memory

This nightly process prepares the body to fight infections effectively.

How Sleep Deprivation Disrupts Immune Function

When sleep is inadequate:

immune cell activity decreases
antibody production drops
inflammation increases

WHO studies confirm that sleep deprivation weakens immune defence mechanisms.

Increased Risk of Infections

People who sleep less than 6 hours regularly:

fall sick more often
catch colds and flu easily
recover slower from illness

Lancet research shows a strong link between sleep duration and infection susceptibility.

Impact on Inflammation

Poor sleep increases inflammatory markers.

Chronic inflammation:

weakens immune response
increases risk of chronic diseases

ICMR reports highlight sleep deprivation as a contributor to low-grade systemic inflammation.

Effect on Vaccine Response

Sleep quality affects how well vaccines work.

Studies show:

poor sleep reduces antibody response
adequate sleep improves vaccine effectiveness

Sleep is essential for immune memory formation.

Hormonal Changes That Affect Immunity

Sleep regulates hormones such as:

cortisol
melatonin

Lack of sleep increases cortisol, which suppresses immune function.

Stress, Sleep and Immunity

Sleep deprivation and stress reinforce each other.

High stress:

disrupts sleep
suppresses immune cells

This cycle weakens overall resistance to illness.

Impact on Gut Immunity

The gut hosts a major part of the immune system.

Poor sleep:

disrupts gut microbiome
weakens gut immunity

Lancet studies link sleep deprivation to gut-related immune dysfunction.

Why Children and Older Adults Are More Vulnerable

Sleep deprivation affects:

children’s developing immune systems
older adults’ already weakened immunity

Adequate sleep is especially important in these age groups.

Signs Your Immunity Is Affected by Poor Sleep

Warning signs include:

frequent infections
slow wound healing
constant fatigue
increased allergies

These symptoms indicate compromised immune defence.

Long-Term Health Risks of Poor Sleep

Chronic sleep deprivation increases risk of:

infections
autoimmune disorders
metabolic diseases
heart disease

Sleep loss affects nearly every body system.

Role of Preventive Health Awareness

Preventive healthcare emphasises:

sleep as a foundation of immunity
early lifestyle correction

NITI Aayog recognises sleep hygiene as essential for population health.

How to Improve Sleep for Better Immunity

Effective strategies include:

fixed sleep and wake times
limiting screen exposure before bed
avoiding caffeine late in the day
creating a dark, quiet sleep environment

Consistency matters more than duration alone.

Myths About Sleep and Immunity

Myth: You can catch up on sleep later
Fact: Chronic sleep debt harms immunity.

Myth: Sleeping pills improve immunity
Fact: Natural sleep is more beneficial.

Why Sleep Is a Preventive Medicine

Sleep:

costs nothing
requires no equipment
delivers powerful immune protection

It is one of the most effective preventive health tools.

Conclusion

Understanding how lack of sleep weakens immunity highlights the critical role of sleep in protecting the body from infections and chronic disease. Poor sleep disrupts immune cell function, increases inflammation and reduces resistance to illness. Prioritising consistent, quality sleep is not optional—it is essential for strong immunity, faster recovery and long-term health. Protecting sleep today strengthens immune defence for tomorrow.

References

Indian Council of Medical Research (ICMR) – Sleep, Immunity and Inflammation Studies
World Health Organization (WHO) – Sleep and Immune Health Guidelines
National Institutes of Health – Sleep Deprivation and Immunity
Lancet – Sleep Duration and Infection Risk
NITI Aayog – Preventive Health and Lifestyle Recommendations

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