Does your little one suddenly start to twitch? Is this what we mean by Infantile Spasms? Let us find out!

Have you ever felt worried when your little baby suddenly starts to twitch or stiffen their body out of nowhere? You might notice this happening many times throughout the day. It is completely natural to wonder if this is just a normal phase or a specific medical condition that needs attention. Today, we are going to look closely at this important topic. This condition is known as infantile spasms. Let us explore what it is, why it happens, what signs to look for, how doctors find it, and what treatments are available.

Finding out that your baby might have a health issue can feel very overwhelming for any parent. However, understanding the condition helps you take quick action and work closely with your doctor. Early diagnosis can make a huge difference in your child's health and future development. Let us walk through everything you need to know about infantile spasms in simple, clear terms.

What Are Infantile Spasms?

Simply put, infantile spasms are a rare and specific type of epilepsy that affects babies under the age of 12 months. Epilepsy is a neurological disorder caused by abnormal electrical activity in your baby's brain. When infantile spasms happen, your baby's body, especially the belly area, head, neck, arms, and legs, suddenly stiffens or jerks.

These sudden spasms last for a very short time, usually just one or two seconds. However, they often occur in a cluster. This means one spasm happens, followed by a short pause of five to ten seconds, and then another spasm follows. Imagine seeing your baby jerk several times in a row. Most of the time, these spasms happen right after your baby wakes up from sleep.

The sad part is that many babies who experience this condition may already have developmental delays, or they might develop them later. This means your baby might take longer to reach normal growth milestones compared to other children of the same age.

Difference Between Infantile Spasms and West Syndrome.

You might wonder what West Syndrome means, as doctors sometimes use this name. West Syndrome is actually a combination of specific clinical features rather than just one single sign. It includes three main parts:

• The infantile spasms we just discussed.
• An abnormal brain wave pattern called hypsarrhythmia, which doctors discover using an EEG test.
• Developmental delays or the loss of skills your baby had already learned, known as developmental regression.

However, not every baby with infantile spasms will have West Syndrome. A baby can experience infantile spasms without having severe developmental delays right away.

Difference Between Spasms and Seizures.

Yes, this is an important question. Infantile spasms are actually a type of seizure. A seizure happens when brain cells have a sudden burst of uncontrolled electrical activity. This temporarily changes how muscles stiffen, how the body moves, and how a person behaves or feels. Not all seizures look the same.

When you compare infantile spasms to a large generalized seizure, such as a tonic-clonic seizure, the main difference is the duration. Infantile spasms last only a second or two, but they come in clusters. Other types of seizures might last anywhere from thirty seconds to a couple of minutes.

Difference Between Infantile Spasms and Startle Reflex.

This is another thing that parents often confuse because infantile spasms can sometimes look like a normal startle reaction.

Normally, babies startle, also called the Moro reflex, when they hear a loud noise or feel a sudden movement. When this happens, your baby throws their head back, stretches out both arms and legs, and opens their hands wide. They might cry for a moment and then bring their arms and legs back in toward their body.

However, with infantile spasms, there is no external trigger. The movement does not happen because of a loud noise or sudden event. Also, infantile spasms happen in clusters. A normal startle reflex does not repeat itself in quick succession like that. also, during infantile spasms, your baby's eyes might roll upward or their face might grimace. You rarely see these facial signs during a normal startle reflex.

When Do Infantile Spasms Start?

Doctors note that about ninety percent of infantile spasms are diagnosed in babies under 12 months old. You see them most often when babies are between four and seven months of age. However, older infants can sometimes experience similar spasms, which doctors classify simply as epileptic spasms.

How Common Is This Condition?

This condition is not extremely common, but it does happen. Experts estimate that infantile spasms affect roughly one in every two thousand to four thousand babies.

Symptoms of Infantile Spasms.

When these spasms happen, your baby's body suddenly stiffens or jerks for just a few seconds. Your baby might bend forward at the waist or jerk their head, arms, and legs. As mentioned before, these movements often happen in a cluster with brief pauses of five to ten seconds between each spasm.

After having one or several spasms, your baby might feel upset and start to cry. However, this does not happen every single time.

Sometimes, infantile spasms are very subtle, making them hard for parents to notice right away. Subtle signs include:

• Your baby's eyes rolling upward.
• The belly area tightening up suddenly.
• Small chin movements or jaw clenching.
• Facial grimacing.
• Gentle head nodding.

If an underlying brain issue causes the spasms, the movements might affect only one side of your baby's body. You might also notice their head or eyes turning to one side.

Most importantly, these spasms almost always happen right after your baby wakes up. They rarely happen while the baby is fast asleep.

Shortly after these spasms begin, you might notice other changes in your baby:

• Loss of developmental milestones your baby had already achieved, such as rolling over, sitting up, crawling, or babbling.
• Decreased social interaction, including a reduction in smiling and eye contact.
• Being unusually fussy or unusually quiet and still.

If possible, try to record a video of your baby when these spasms happen. You can show this video to your pediatrician or pediatric neurologist. Recognizing infantile spasms quickly is very important. If you feel your baby is having these spasms, talk to a doctor as soon as possible.

How Often Do Infantile Spasms Occur?

A single baby can experience up to one hundred spasms or more in a single day. Every baby's experience is unique. Therefore, if you notice your baby having even one or two spasms a day, talking to a doctor right away is the best course of action.

Causes of Infantile Spasms.

Several different factors can cause infantile spasms. Scientists have identified over two hundred medical conditions linked to this issue. In about one-third of all cases, doctors cannot find an exact cause.

These spasms can result from an abnormality in a small area of the brain or from an issue affecting the entire brain.

Some of the main causes include:

• Brain damage or infections: Any form of brain injury can trigger these spasms. Common causes include hypoxic-ischemic encephalopathy, which means the brain did not get enough oxygen or blood flow for a period of time, meningitis, and perinatal stroke, which is a stroke that happens around the time of birth or during the first month of life.
• Brain development problems: Malformations in the central nervous system that develop while the baby is in the womb can cause spasms. Examples include focal cortical dysplasia, lissencephaly, holoprosencephaly, and Aicardi syndrome. Abnormal blood vessels in the brain, known as arteriovenous malformations, can also lead to this condition.
• Gene mutations: Scientists now link many genetic mutations to infantile spasms. Examples include Trisomy 21, also known as Down syndrome, tuberous sclerosis, Miller-Dieker syndrome, and CDKL5 deficiency disorder.
• Metabolic conditions: Inborn errors of metabolism can also cause these spasms. These are genetic conditions that disrupt the chemical pathways your body uses to digest food and create energy. Very rarely, a vitamin B6 deficiency can also trigger infantile spasms.

How Are Infantile Spasms Diagnosed?

Your child's doctor will ask you detailed questions about your baby's symptoms and medical history. They will also perform a physical examination.

Next, the doctor may refer your baby to a pediatric neurologist or a pediatric epileptologist. These specialists perform an electroencephalogram, commonly called an EEG, to confirm if your baby has infantile spasms. They may also order other tests to find the underlying cause.

Because infantile spasms have hundreds of potential causes, finding the exact reason can sometimes take time.

Tests Used for Diagnosis.

Doctors primarily rely on an electroencephalogram, or EEG, to confirm a diagnosis of infantile spasms.

An EEG measures and records the electrical signals in your baby's brain. During the test, a technician attaches small metal discs called electrodes to your scalp using a gentle adhesive. These electrodes connect to a machine that displays your baby's brain activity. Ideally, if your baby has a spasm during the EEG recording, the doctors can capture both the seizure and the time between spasms. Doctors look for a very specific brain wave pattern called hypsarrhythmia. This pattern is very distinctive, which helps doctors diagnose infantile spasms with confidence.

To find the underlying cause of the spasms, your doctor may order additional tests:

• Magnetic resonance imaging (MRI) scan: An MRI is a painless test that creates clear pictures of the tissues and structures inside your baby's brain. It uses a strong magnetic field and radio waves without using harmful X-ray radiation. An MRI helps doctors see if a structural issue in the brain is causing the spasms.
• Genetic and metabolic tests: If your baby's MRI scan is normal, the doctor will likely recommend genetic and metabolic tests to find the cause. These tests usually require blood, urine, or a small sample of spinal fluid.

Treatments for Infantile Spasms.

Treatment has two main goals. The first goal is to stop or control the spasms. The second goal is to treat the underlying cause whenever possible.

The primary medical treatments used to stop or manage the spasms include:

• Adrenocorticotropic hormone (ACTH): ACTH is a hormone produced by your pituitary gland that helps your body respond to stress. When released, ACTH stimulates your adrenal glands to produce cortisol, often called the stress hormone. ACTH used for treating spasms is a synthetic version given as an injection. Medical staff usually give the first few doses in the hospital so they can monitor your baby closely for any side effects. Because your baby needs these injections for about six weeks, your doctor will teach you how to give them safely at home.
• Oral prednisolone: This medicine is a synthetic version of a corticosteroid hormone produced by the adrenal glands. It works very well for treating infantile spasms and is often used when ACTH is difficult to obtain.
• Vigabatrin: This is an anti-seizure medicine given by mouth as a pill or liquid.

If your baby does not respond to hormone treatments or vigabatrin, doctors have other treatment options:

• The ketogenic diet.
• Other anti-seizure medicines.
• Epilepsy surgery, if the spasms stem from a localized lesion in one specific part of the brain.

Treating infantile spasms can sometimes prove challenging. Some children need a second course of treatment or a different therapeutic approach. Throughout treatment, doctors will perform repeat EEG tests to check your baby's brain activity and see how well the treatment is working.

If your doctor identifies the underlying cause of the spasms, treating that specific cause is also important. This might include surgery or targeted therapy for an underlying genetic or metabolic disorder.

Developmental delays and setbacks are very common with infantile spasms. Your baby's medical team will suggest therapies to support their ongoing development as much as possible.

Side Effects of Infantile Spasms Treatments.

Treatments for infantile spasms can cause side effects. Here are common side effects for each option:

Possible side effects of ACTH treatment include:

• High blood pressure, known as hypertension.
• A weakened immune system, known as immunosuppression.
• Swelling, especially around the face.
• Restlessness and irritability.
• Stomach or intestinal ulcers.
• Glucose in the urine.

Possible side effects of vigabatrin include:

• Permanent narrowing of the visual field.
• Irritability.

Because of these potential side effects, your doctor will discuss the best treatment choice with your family and monitor your baby closely during the process.

Prognosis for Infantile Spasms.

The future outlook, or prognosis, depends on several key factors:

• The underlying cause of the infantile spasms.
• Whether doctors can successfully treat that cause.
• How quickly doctors diagnose the condition and start treatment.
• Whether your baby was reaching developmental milestones normally before the spasms began.

About half of all children with infantile spasms experience long-term developmental and neurological challenges. Even after the spasms stop, many children develop other types of seizures and epilepsy later in life.

However, early diagnosis and successful treatment can greatly improve the overall outcome. Children who met their developmental milestones before the spasms started have a better chance of growing up normally.

How to Care for a Baby with Infantile Spasms.

If your baby has infantile spasms, following your doctor's instructions carefully gives them the best support:

• Give every prescribed medicine exactly as directed.
• Attend all developmental evaluations and therapy sessions.
• Keep all follow-up medical appointments.

Infantile spasms can cause cognitive, neurologic, and sensory challenges. Many children with this condition experience developmental delays and may need ongoing support with everyday activities throughout their lives.

Your care team can answer your questions and offer support. They can also connect you with local or online support groups where you can talk to other families facing similar challenges.

When to See a Doctor.

If your child has a confirmed diagnosis of infantile spasms, you need to visit their medical team regularly to ensure the treatments are working effectively. Doctors will also use EEG tests to monitor brain activity throughout the treatment period.

If you suspect your baby has infantile spasms but they do not have a diagnosis yet, seeing a doctor as soon as possible is very important.

It is completely normal to feel worried when you notice your baby acting differently or falling behind on developmental milestones. You know your baby best. If you feel your baby is having spasms, such as sudden body stiffening or jerking movements that often happen in clusters, talk to a doctor as soon as you can. Try to record a video of the movements to show your doctor. Recognizing infantile spasms early helps achieve the best possible results.

Take-Home Message.

As we wrap up our discussion, here are the most important points to keep in your heart and mind:

• Infantile spasms are a serious type of epilepsy that affects babies under 12 months of age.
• If your baby suddenly jerks, stiffens their body, or has spasms in clusters especially after waking up, do not brush it off.
• These movements are different from a normal startle reflex.
• Try to record a video of the spasms and show it to your doctor.
• Early diagnosis and prompt treatment can make a huge difference in your baby's future development.
• If you notice changes in your baby's behavior, smile, or development, talk to your doctor right away.
• This experience can feel very stressful for parents. Follow medical advice closely and seek support. You are not alone, and doctors are here to help your family.

Sources & References.

1. National Health Service (NHS). Infantile spasms overview and symptoms. Available from: NHS UK.
2. Mayo Clinic. Infantile spasms: Symptoms, causes, and treatments. Available from: Mayo Clinic.
3. Centers for Disease Control and Prevention (CDC). Developmental milestones and neurological health in infants. Available from: CDC.
4. Cleveland Clinic. West Syndrome and Infantile Spasms: Diagnosis and Management. Available from: Cleveland Clinic.
5. National Institutes of Health (NIH) / PubMed. Clinical characteristics and therapeutic management of infantile spasms. PMID: 29841200.