More than 80% of children with Angelman syndrome have epilepsy with onset
typically in the first three years of life. They frequently have mixed seizure disorders
ranging from as mild as occasional absence seizures to hundreds of drop attacks per
day. Seizures can be life threatening and correct medication is vital in order to control
them. Seizures can interfere with learning and can also be linked to certain unusual
Most (not all) children with Angelman Syndrome have abnormal EEGs
(electroencephalograms) and many are prone to significant seizure activity that is often
tricky to control in childhood. They usually demonstrate an abnormal EEG with a
characteristic pattern of large amplitude slow-spike waves. (Image here shows
Characteristic Angelman EEG, with Triphasic delta wave activity arrowed.)
More info on Angelman syndrome and Epilepsy:
From the Epilepsy Foundation - read here
Seizure treatment in Angelman syndrome (Download the pdf here ) - a recent case series from the Angelman Syndrome Clinic at Massachusetts General Hospital Elias A. Shaaya, Olivia R. Grocott, Olivia Laing, Ronald L. Thibert
New YouTube videos:
2017 ASF Family Conference: Seizures in Angelman Syndrome - by Ronald Thibert, DO, MsPH
What can you do?
If your child has seizures, it is helpful for the child, the parent, other carers/aides, and the medical
professionals involved, if you have a consistent plan of action.
Seizure Response Plan/Epilepsy Management Plan
Why is it important to have a Seizure Response Plan?.
A seizure response plan is a written document that provides general medical
information about the person with epilepsy (including personal identifying
information), emergency contacts, details about his or her specific seizures,
medicines, and information on what to do if a seizure happens. Your child's
GP or neurologist can help you fill this out. There are several samples of these
plans on the internet.
If your child has epilepsy, this seizure response plan should be on file with
teachers and the school nurse’s office (or wherever your child spends time,
such as an aftercare program, camp, or with a babysitter. Having a plan readily
available will help minimize the impact of seizures for the person with epilepsy,
and help others to manage seizures appropriately.
The family plays a central role in your child's seizure management.
Your success in managing your child's seizures/epilepsy will depend
on being prepared to tackle whatever comes your way – from understanding
epilepsy and maintaining seizure control, to responding to seizures and
A Seizure Response Plan can help you organize your child's seizure
information and have it available when and where you need it. It can help
you know what to do to prevent an emergency, or tell others what to do in
emergency situations. You can also adapt these plans to different situations
in your child's life.
By helping you be prepared, seizures (or the fear of seizures) won’t prevent
you from letting your child participate and enjoy their life to the fullest.
Support groups on Facebook
Angelman Syndrome Seizure Information group – for sharing information
around seizures, AEDs, CBD oil, diet management, etc.
What are tremors?
Myoclonus describes a symptom and not a diagnosis of a disease. It refers to
sudden, involuntary jerking of a muscle or group of muscles. Read more here:
Subtypes of epilepsy-induced myoclonus include cortical reflex myoclonus,
progressive myoclonus epilepsy, and reticular reflex myoclonus. Each subtype
refers to a form of epilepsy that affects different brain regions. These tremors are
not the same as seizures and can be extremely difficult to treat.
Dysautonomia can also present as tremors. It is an umbrella medical term utilized
for a group of complex conditions that are caused by a dysfunction of the
autonomic nervous. Read more on this lesser known condition, here.
For more support and in-depth information on Epilepsy, see Epilepsy New Zealand
1. Log Book
Keep a detailed log to record unusual behaviors or possible seizure activity. A sample template for a seizure log/journal can be found here.
This can be a helpful tool to identify triggers and seizure types, should further investigations be needed.
2. Take video clips
Video clips of your child that record unusual behaviors or possible seizure activity is useful information for a specialist when trying to identify what type of seizures your child is having.
RESEARCH on Epilepsy in AS
Due to the high rate of seizures among people who have AS, there is ongoing research on Epilepsy and Angelman Syndrome. Some research articles are listed here:
The effects of herbal medicine on epilepsy (2017) - Wei Liu, Tongtong Ge, Zhenxiang Pan, Yashu Leng, Jiayin Lv and Bingjin Li