Functional Seizures Can Look Very Different—Here’s Why
Sep 21, 2026
A clearer understanding for people experiencing functional seizures and those supporting them.
One of the most confusing things about functional seizures is how different they can look.
One person may shake, jerk or stiffen. Another may collapse, stare or become completely still. Some people remain partly aware but cannot speak or respond. Others describe feeling distant, frozen or disconnected from their body.
The same person may experience more than one of these patterns.
This variation can be difficult to understand—especially when medical tests have been normal or different health professionals have offered different explanations.
But there is one essential starting point:
Functional seizures are real, involuntary and not deliberately produced.
Functional seizures affect more than movement
Functional seizures involve temporary changes in how the brain and nervous system manage movement, awareness, responsiveness and body signals.
They can also involve changes in:
- Nervous-system arousal
- Heart rate and breathing
- Attention and awareness
- The processing of sensations from inside the body
- The person’s sense of control over movement
These changes help explain why a functional seizure can feel intensely physical—even when scans do not show structural damage and the episode is not caused by the epileptic electrical activity seen in epilepsy.
Why can movement increase—or disappear?
Functional seizures can affect motor control in apparently opposite ways.
Some episodes involve a noticeable increase in movement. Others involve movement becoming reduced, inhibited or temporarily unavailable.
This means a person may appear highly active during one seizure but still, frozen or unresponsive during another.
Importantly, appearing still does not necessarily mean that the person’s nervous system is calm. They may be experiencing significant internal activation, altered breathing, palpitations or distress while being unable to move or respond.
Being still does not mean calm. Being aware does not mean voluntary.
Understanding this can be reassuring for the person experiencing seizures—and can help family members, friends and health professionals respond with greater compassion.
Clear information can reduce uncertainty
Many people with functional seizures and their families are left with practical questions:
- What should someone do during a seizure?
- What should they avoid?
- What may help during recovery?
- Are there warning signs?
- When is medical assistance needed?
- How are functional seizures different from epilepsy?
- What information should be included in a seizure management plan?
Having clear, consistent information can reduce uncertainty and help everyone respond more confidently.
That is why we created the free Understanding Functional Seizures: A Guide for Patients and Families.
Enter your details below and we will send the guide directly to your inbox.
Download the Understanding Functional Seizures Guide
Clear information. Compassionate support. A practical place to begin.
A note from Let’s Talk FND
Receiving a functional-seizure diagnosis can bring relief, uncertainty or both. You may still have questions about what is happening, what recovery could look like and how to explain the condition to others.
You do not need to understand everything at once.
The guide is designed to give you a clear starting point and help you take the next step at your own pace.
Download the free Functional Seizures Guide
This article and guide provide general education and reflection. They are not diagnostic tools, individual treatment plans or substitutes for assessment and advice from your treating team.
The guide provides a clear, patient-friendly explanation of functional seizures and practical information you can return to when you need it.
Inside, you will find:
- A plain-language explanation of functional seizures
- Examples of how functional seizures can present
- An explanation of increased, reduced and frozen movement
- Key differences between functional seizures and epilepsy
- Practical guidance for during and after an episode
- Information about warning signs and early responses
- Safety guidance and when to seek medical assistance
- A simple explanation of why seizures can recur
- Practical ways to begin interrupting the cycle
It can also be shared with family members, friends, support workers or others who may be present during an episode
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