Overview
Autism Spectrum Disorder (ASD), Attention-Deficit/Hyperactivity Disorder (ADHD), and Epilepsy are neurodevelopmental and neurological conditions that often overlap.
They are connected through:
- Shared brain development pathways
- Genetic links
- Differences in neurological regulation
Key idea:
These conditions often do not exist alone—they interact and overlap in complex ways.
The Co-Occurrence Reality
These conditions frequently appear together, forming overlapping diagnostic profiles.
Autism + ADHD Overlap
Autism Spectrum Disorder
Attention-Deficit/Hyperactivity Disorder
- Up to 30–50% of autistic individuals may also have ADHD
- Autism often prefers routine and predictability
- ADHD often seeks novelty and stimulation
Internal impact:
- Conflicting needs (structure vs stimulation)
- Difficulty regulating attention and behaviour
- Increased sensory and emotional strain
Epilepsy Link
Epilepsy
- Higher prevalence in autistic individuals
- Seizures can temporarily alter awareness and behaviour
- Absence seizures may look like inattentiveness
Important:
- Seizures can sometimes be mistaken for ADHD or behaviour issues
- Accurate diagnosis is essential
Shared Biological Roots
Research suggests:
- Imbalance in brain excitation and inhibition
- Shared neurodevelopmental pathways
- Overlapping genetic influences
The Sensory Connection
Sensory processing differences are central across all three conditions.
Hypersensitivity & Hyposensitivity
People may experience:
-
Hypersensitivity (over-sensitive):
- Bright lights feel painful
- Certain textures feel unbearable
- Loud sounds overwhelming
-
Hyposensitivity (under-sensitive):
- High pain tolerance
- Seeking strong sensory input
- Need for movement or pressure
Sensory Overload
When the brain becomes overwhelmed:
- Stress levels increase rapidly
- Meltdowns may occur
- Seizure thresholds may be affected
Executive Function Challenges (ADHD)
ADHD can add:
- Difficulty filtering background noise
- Impulsive responses to overload
- Attention instability
- Increased emotional reactivity
Navigating Cumulative Challenges
When these conditions co-occur:
- Brain processing is significantly different from neurotypical functioning
- Experiences of the environment are intensified or fragmented
- No two individuals present the same profile
Key principle:
👉 Support must be fully personalised
Support & Research Resources
- AutismBC
- National Center for Biotechnology Information
- National Health Service
- ScienceDirect
These provide:
- Clinical research on co-occurring conditions
- Sensory processing information
- Diagnostic guidance
- Support strategies
📖 2. Easy Read Version
What are these conditions?
Some people have:
- Autism
- ADHD
- Epilepsy
These conditions can happen together.
What does that mean?
A person may:
- Think differently
- Feel things more strongly
- Process the world in a different way
Autism and ADHD together
- Autism likes routine
- ADHD likes change and activity
This can feel confusing for the brain.
Epilepsy
- Causes seizures
- Can affect awareness
- Sometimes looks like “spacing out”
Sensory differences
A person may:
- Feel sounds too loud
- Feel lights too bright
- Want strong sensory input
- Feel overwhelmed easily
Important message
- Everyone is different
- No two people experience it the same way
- Support should be individual
🧾 3. Printable Checklist
Co-Occurring Conditions Support Checklist
Understanding
- ☐ I understand ASD, ADHD, and epilepsy can overlap
- ☐ I understand each condition affects the brain
- ☐ I recognise individual variation
Sensory Awareness
- ☐ I identify sensory triggers
- ☐ I support sensory regulation needs
- ☐ I reduce overload risks
Behaviour & Attention
- ☐ I understand attention differences
- ☐ I avoid misinterpreting seizures or behaviours
- ☐ I support executive function needs
Support Planning
- ☐ I provide personalised support
- ☐ I adapt environments
- ☐ I prioritise safety and regulation
📊 4. PowerPoint Outline
Slide 1: Title
Autism, ADHD & Epilepsy – Co-Occurring Conditions
Slide 2: What are they?
- Neurodevelopmental conditions
- Often occur together
Slide 3: Autism & ADHD Overlap
- Different brain needs
- Routine vs novelty
Slide 4: Epilepsy Connection
- Seizures
- Misinterpretation risks
Slide 5: Shared Biology
- Brain regulation differences
- Genetic links
Slide 6: Sensory Processing
- Over- and under-sensitivity
- Sensory overload
Slide 7: Executive Function
- Attention differences
- Impulsivity
- Planning challenges
Slide 8: Impact on Daily Life
- Individual experiences vary
- Complex support needs
Slide 9: Key Principle
- Personalised support is essential
📝 5. Level 1 Quiz
Multiple Choice
1. Autism and ADHD often:
A. Never occur together
B. Occur together frequently
C. Are unrelated
✔ Correct: B
2. Epilepsy involves:
A. Hearing loss
B. Seizures
C. Vision problems
✔ Correct: B
3. Sensory overload can cause:
A. Calmness
B. Stress or meltdowns
C. Improved focus
✔ Correct: B
4. ADHD can affect:
A. Movement only
B. Attention and impulse control
C. Skin sensitivity
✔ Correct: B
True or False
5. Everyone experiences these conditions the same way.
❌ False
6. Autism and ADHD can overlap.
✔ True
7. Sensory issues are common in these conditions.
✔ True
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