Acute Flaccid Myelitis (AFM)

By: Tavishi Gupta

Acute Flaccid Myelitis, or AFM, is a rare but serious condition that affects the spinal cord, leading to sudden muscle weakness and sometimes paralysis.

What is Acute Flaccid Myelitis (AFM)?

AFM is a condition that affects the nervous system, particularly the spinal cord, which is a critical part of the body that helps send signals from the brain to the muscles. When someone has AFM, the spinal cord becomes inflamed, and this can disrupt the signals between the brain and the muscles, causing sudden weakness in the arms and legs.

How Does AFM Affect People?

AFM can come on very quickly and can be very frightening because it often starts with sudden weakness in the limbs. In severe cases, it can lead to paralysis, where the person loses the ability to move certain parts of their body. The condition can also affect muscles that help with breathing, which can make it a life-threatening emergency.

Here are some common effects of AFM:

1. Sudden Muscle Weakness: The most noticeable sign of AFM is the sudden onset of weakness in the arms or legs. This weakness can be mild at first but can quickly become severe.

2. Loss of Muscle Tone: The muscles may feel floppy or loose, a condition known as "flaccid" paralysis.

3. Difficulty Moving: Because AFM affects the spinal cord, it can make it hard for the person to move their arms, legs, or other parts of the body.

4. Breathing Problems: In some cases, the muscles that control breathing can be affected, leading to difficulty breathing and the need for a ventilator.

5. Facial Weakness: AFM can also affect the muscles in the face, making it hard to smile, speak, or swallow.

   
   

What Causes AFM?

The exact cause of AFM is not always clear, but it is often linked to viral infections. Some of the viruses that have been associated with AFM include:

• Enteroviruses: These are common viruses that usually cause mild illness, but in some cases, they can lead to more serious conditions like AFM.

• West Nile Virus: This virus, which is spread by mosquitoes, has also been linked to cases of AFM.

• Other Viral Infections: Various other viral infections have been suspected of causing AFM, though the exact relationship is still being studied.

It’s important to note that not everyone who gets these viruses will develop AFM. Researchers are still trying to understand why some people develop AFM after a viral infection and others do not.

Signs and Symptoms of AFM

AFM typically affects children more than adults, and the symptoms can appear very suddenly. Some common signs to watch for include:

• Sudden Weakness in Arms or Legs: This is often the first and most noticeable symptom. The weakness usually affects one side of the body more than the other.

• Loss of Muscle Tone: The affected limbs might feel floppy or loose.

• Difficulty with Eye Movements or Drooping Eyelids: AFM can affect the muscles that control eye movement, leading to problems like double vision.

• Facial Droop or Weakness: The muscles of the face might be affected, making it hard to smile or move facial muscles.

• Difficulty Swallowing or Speaking: AFM can affect the muscles involved in speaking and swallowing, leading to slurred speech or choking.

  
  

How is AFM Diagnosed?

Diagnosing AFM can be challenging because its symptoms are similar to other neurological conditions. Doctors will typically perform a combination of tests to diagnose AFM, including:

• MRI Scans: These scans create detailed images of the spinal cord and can show signs of inflammation.

• Lumbar Puncture (Spinal Tap): This test involves taking a sample of cerebrospinal fluid from the spine to check for signs of infection or inflammation.

• Nerve Conduction Studies: These tests measure how well the nerves are sending signals to the muscles.

• Blood Testa: Blood tests can help rule out other causes of the symptoms and look for signs of infection.

How is AFM Treated?

There is no specific cure for AFM, but treatment focuses on managing symptoms and supporting recovery. Treatment options might include:

• Physical Therapy: Physical therapy can help strengthen muscles, improve range of motion, and prevent stiffness.

• Occupational Therapy: Occupational therapy focuses on helping the person regain independence in daily activities, like dressing, eating, and using their hands.

• Respiratory Support: If AFM affects the muscles used for breathing, the person might need a ventilator to help them breathe.

• Medications: While there are no specific antiviral medications for AFM, doctors might use treatments to reduce inflammation in the spinal cord.

• Rehabilitation: Long-term rehabilitation is often needed to help regain strength and improve movement. Recovery can vary widely, with some people recovering fully and others experiencing lasting effects.

How Can We Support People with AFM?

Supporting someone with AFM means being there for them as they navigate the challenges of the condition. Here are some ways to offer support:

• Provide Emotional Support: AFM can be a scary and frustrating condition. Be there to listen and offer encouragement.

• Encourage Therapy and Rehabilitation: Ongoing therapy is key to recovery. Encourage them to stay engaged with their therapy and celebrate small victories.

• Help with Daily Activities: Offer to help with tasks that might be difficult, such as dressing, cooking, or getting around.

• Stay Informed: Learn about AFM so you can better understand what they’re going through and how you can help.

• Promote Awareness: Spread the word about AFM to help others recognize the signs and seek help early.

5 Random Facts About AFM

1. AFM primarily affects children, with most cases occurring in kids under the age of 18.

2. AFM cases tend to spike every two years, with larger outbreaks reported in 2014, 2016, and 2018.

3. The condition has been linked to enterovirus D68, but not everyone who gets the virus will develop AFM.

4. While AFM is rare, it can lead to long-term disability in some cases, making early treatment and rehabilitation crucial.

5. AFM was first recognized as a distinct condition in 2014, though similar cases have been reported in the past.