Angelman Syndrome: Care Staff Guide to Communication and Seizures

Angelman syndrome is a rare genetic condition that causes severe learning disability, little or no speech, problems with balance and movement, and often epilepsy. People with Angelman syndrome are frequently described as having a happy, sociable nature, and with the right support they can communicate, build relationships and enjoy life. This guide, based on NHS information, explains what Angelman syndrome is and how care and support staff can help. It links to our guides on Oliver McGowan mandatory training, epilepsy awareness and ataxia.

What is Angelman syndrome?

The NHS describes Angelman syndrome as a rare genetic condition affecting the nervous system. It causes severe physical and learning disabilities. People with the condition have a near-normal life expectancy but need lifelong support.

What causes it?

According to the NHS, the UBE3A gene is usually missing or not working. In most cases there is no active copy of the gene from the mother. This usually happens by chance around the time of conception. Rarely, a person inherits two inactive copies from their father, and in some cases the cause is unknown. A genetic doctor can advise families about the chance of it happening again.

Signs and symptoms

• Development: delays are usually noticed from around 6 to 12 months, such as not being able to sit unsupported or babble
• Speech: little or no speech. Most people communicate using gestures, signs or other systems
• Movement: balance and coordination problems (ataxia), tremors, stiff legs and difficulty walking
• Seizures: these may begin around the age of two
• Happy demeanour: frequent laughter and smiling, easy excitement and hand flapping
• Sleep: trouble sleeping and needing less sleep than other people of the same age
• Other features: hyperactivity, short attention span, a fascination with water, feeding difficulties in babies, curvature of the spine, crossed eyes and a small head

Diagnosis

The NHS says Angelman syndrome is suspected from delayed development and distinctive features, and confirmed by genetic blood tests. It is usually diagnosed between 9 months and 6 years of age. Most adults you support will already have a diagnosis, so the key is to read their care plan and communication profile closely.

Treatment and management

There is no cure, although clinical trials are ongoing. The NHS describes management as follows:

• anti-epileptic medicines for seizures
• physiotherapy for posture, balance, walking and joint stiffness
• communication therapy, including sign, visual aids, Makaton, PECS and tablet apps
• behavioural therapy for hyperactivity and attention

Outlook

The NHS says seizures often improve in later childhood but may return in adulthood, hyperactivity lessens with age and sleep may improve. Most people have a lifelong learning disability and limited speech. Adults may lose some mobility and have stiff joints, but the NHS notes that general health is usually good and communication and skills can improve.

Practical support for care staff

• Learn how the person communicates. Use their preferred system consistently, such as Makaton signs, picture cards or an app, and give plenty of time to respond.
• Follow the seizure plan. Know the person's seizure types, rescue medicines and when to call 999.
• Support sleep. Consistent bedtime routines and a safe sleeping environment matter, and sleep problems should be raised with the GP.
• Keep people safe around water. Because of the fascination with water, which the NHS lists, supervise bathing, pools and other water carefully.
• Prevent falls and protect joints. Balance problems and stiffness need physiotherapy advice, suitable footwear and a safe environment.
• Celebrate strengths. A cheerful, sociable nature should never lead to the person being treated as a child. Respect their age, dignity and choices.
• Do not assume lack of understanding. Limited speech does not mean limited comprehension.

Working with families and other professionals

Families usually know the person best, including how they signal pain, tiredness, excitement or distress. Ask them to share what works, and record it in the care plan so that every member of staff responds in the same way. A person with Angelman syndrome may have input from a neurologist, a physiotherapist, a speech and language therapist, a dietitian and a learning disability nurse, so make sure that appointments are coordinated and that advice is put into daily practice. If you notice a change in seizures, sleep, mobility or eating, tell the team promptly.

Support and further information

The NHS signposts AngelmanUK, which offers information, support and a helpline on 0300 999 0102, and the Foundation for Angelman Syndrome Therapeutics. The NHS page was due for review in March 2026, so staff should check with the person's specialist team for the latest advice.

Frequently asked questions

Do people with Angelman syndrome speak?

Most have little or no speech, according to the NHS, and communicate through gestures, signs or other systems.

Is Angelman syndrome inherited?

Usually it happens by chance. Rarely, two inactive copies of the gene are inherited from the father. A genetic doctor can advise families.

Can adults with Angelman syndrome live long lives?

The NHS says life expectancy is near normal, with lifelong support needed.

Where can staff build their knowledge?

The health and social care learning available through Learnsignal CPD can help you support people with learning disabilities.

This article is general information for care staff, based on NHS information, and does not replace the advice of a person's own clinicians. If you are worried about someone's health right now, contact their GP, NHS 111 or, in an emergency, call 999.