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Cerebral palsy: what it is, types & causes

What Is Hemiplegic Cerebral Palsy?

Last updated 28 October 2026 · 8 min read · By Sarah M., Support Coordinator
In short

Hemiplegic cerebral palsy is a form of cerebral palsy that affects one side of the body, usually one arm and one leg. It is also called unilateral cerebral palsy, and it is one of several types described in our guide to cerebral palsy explained.

This page covers what it looks like, how left and right sided hemiplegia differ in everyday life, how it is assessed, and the support available in Australia.

Key points

  • Hemiplegic cerebral palsy affects one arm and one leg on the same side of the body, and it is a form of unilateral cerebral palsy.
  • Spastic cerebral palsy, which involves stiff and tight muscles, is the most common form of cerebral palsy overall (70-80%), and hemiplegia can be spastic.
  • Symptoms usually appear in the first 2 years of life, and diagnosis is usually confirmed by age 2.
  • Support such as therapy, equipment and help at home depends on the person and their goals.
Hemiplegic cerebral palsy at a glance
What it isUnilateral cerebral palsy affecting one arm and one leg on one side of the body
Most common problem in cerebral palsy overallSpasticity, meaning stiff and tight muscles
When it is usually recognisedSymptoms usually appear in the first 2 years, with diagnosis usually confirmed by age 2
Who assesses itStart with your GP, who can refer you to a specialist
NDIS relevanceSupports may be funded if you meet the NDIS access requirements
Official sourceshealthdirect, Cerebral Palsy Alliance, Royal Children’s Hospital Melbourne

What is hemiplegic cerebral palsy?

Cerebral palsy is a group of conditions that affect movement and posture. In hemiplegic cerebral palsy, the effects are mainly on one side of the body, and Cerebral Palsy Alliance describes hemiplegia as unilateral cerebral palsy affecting one arm and one leg on one side (Cerebral Palsy Alliance).

TermWhat it meansWhy it matters
HemiplegiaMovement difficulty affecting one side of the bodyIt shows which limbs may need therapy, equipment or extra time
UnilateralAffecting one side onlyIt separates this type from bilateral types that affect both sides
SpasticMuscles that are stiff and tightIt influences stretching, therapy and daily routines
HemiplegicThe word used for the one-sided pattern in cerebral palsyYou will see it in medical letters and NDIS evidence

Hemiplegia cerebral palsy compared with other types

Cerebral palsy is often described by which parts of the body are affected, and the pattern helps professionals plan support.

PatternBody parts affectedNotes
HemiplegiaOne arm and one leg on one sideUnilateral cerebral palsy
DiplegiaBoth legs, arms to a lesser extentBilateral pattern
QuadriplegiaBoth arms and both legsBilateral, described as the most severe of the three
  • These descriptions come from the Cerebral Palsy Alliance, and the wider picture is in our guide to types of cerebral palsy.
  • Some people also use the term monoplegia cerebral palsy when one limb is mainly affected, so ask your specialist which description fits.

Spastic hemiplegic cerebral palsy

Spastic hemiplegia describes one-sided cerebral palsy where the affected muscles are stiff and tight.

  • Spastic cerebral palsy is the most common form, at 70-80% of cerebral palsy, according to Cerebral Palsy Alliance.
  • Dyskinetic cerebral palsy (6%) involves involuntary movements, and ataxic (6%) involves shaky movements affecting balance.
  • Mixed cerebral palsy is a combination of types, so a person can have features of more than one.
  • healthdirect says spasticity is the most common problem in cerebral palsy.

Read more in our guides to spastic cerebral palsy and dyskinetic cerebral palsy.

Looking for NDIS support at home?

TQN Care support workers help with personal care, community access, respite and help around the home across Sydney, Melbourne and surrounding areas (NSW & VIC). Tell us what you need and we will call you back.

Make a referral →

Hemiplegic cerebral palsy symptoms

Symptoms vary a lot between people, and no single list applies to everyone. healthdirect lists cerebral palsy symptoms that include the following (healthdirect).

  • Stiffness or floppiness in the muscles.
  • Exaggerated reflexes or jerking.
  • Muscle weakness.
  • Uncontrolled movements.
  • Balance and coordination problems.
  • Difficulty with swallowing, sucking or eating (more in signs and symptoms of cerebral palsy).

Right and left sided hemiplegia cerebral palsy

Right hemiplegic and left hemiplegic cerebral palsy simply describe which side of the body is affected. Both are forms of unilateral cerebral palsy.

DescriptionWhat it usually means day to day
Right hemiplegia cerebral palsyThe right arm and leg are mainly affected
Left hemiplegia cerebral palsyThe left arm and leg are mainly affected
Both versionsTherapy, equipment and routines are planned around the person’s strengths and goals, not around the label
  • A physiotherapist or occupational therapist can suggest options that suit you or your child.

Hemiplegic cerebral palsy in adults

Adults with hemiplegia can ask for their needs to be reviewed as work, study, family life or daily tasks change.

  • Ask your GP for a review of your mobility, pain, fatigue and hand function if daily tasks are getting harder.
  • Talk to a physiotherapist or occupational therapist about stretching, strengthening, equipment and home set-up.
  • Think about workplace adjustments, such as a keyboard layout, seating or a flexible start time, and ask your employer what is available.
  • Keep a copy of recent medical and therapy reports, because they are useful evidence if you apply to the NDIS or ask for a plan review.

How is hemiplegic cerebral palsy assessed in Australia?

Assessment is made by health professionals, not by a checklist. healthdirect says symptoms usually appear in the first 2 years and diagnosis is usually confirmed by age 2.

  1. Talk to your GP. Describe what you have noticed, when it started and how it affects movement or feeding.
  2. Ask for a referral. Your GP may refer you to a paediatrician, neurologist or developmental clinic.
  3. Attend the assessment. Specialists examine movement, muscle tone, reflexes and development, and may arrange other tests.
  4. Ask about next steps. Ask which therapists, equipment and community supports could help.

Support and therapies

Support is built around the person’s goals, and the right mix differs from one person to another. Our guide to treatment for cerebral palsy describes the options, and your specialist can advise on what suits you.

  • Physiotherapy and occupational therapy to build movement, hand skills and independence in daily tasks.
  • Speech pathology if speech, swallowing or eating is affected.
  • Equipment such as orthoses, adapted cutlery or mobility aids, recommended by a therapist.
  • Support workers for personal care, community access and help around the home, which may be funded by the NDIS if you meet the access requirements.
  • Information on mild cerebral palsy if your needs are lighter but still affect daily life.

When to talk to a GP or specialist

These are reasons to book an appointment, not signs of an emergency.

  • Your baby cannot hold up their head by 4 months, is not sitting up by 9 months or is not walking by 18 months.
  • You notice that one side of your child’s body moves less, feels stiffer or is used less than the other.
  • Feeding, sucking or swallowing seems difficult, or your child is often unsettled during meals.
  • An adult with hemiplegia notices new pain, weakness, falls or loss of skills.
  • You are unsure which supports to ask for, and want help to prepare for an NDIS plan or review.

Call 000 in an emergency.

Looking for NDIS support at home?

TQN Care support workers help with personal care, community access, respite and help around the home across Sydney, Melbourne and surrounding areas (NSW & VIC). Tell us what you need and we will call you back.

Make a referral →

Your next step

If you or your family member has hemiplegic cerebral palsy and wants practical help at home or in the community, TQN Care can help. Our NDIS services cover personal care, community access, respite and help around the home across Sydney, Melbourne and surrounding areas (NSW & VIC). We do not provide medical treatment, and we work alongside your therapists and health professionals. Make a referral and we will call you to talk through what you need.

SM
Sarah M., Support CoordinatorTQN Care is a registered NDIS provider supporting people across Sydney, Melbourne and surrounding areas (NSW & VIC).
Common questions

FAQs about hemiplegic cerebral palsy

What is hemiplegic cerebral palsy? +

It is a form of cerebral palsy that affects one arm and one leg on the same side of the body. It is also called unilateral cerebral palsy. Your specialist can explain which muscle type, such as spastic, applies.

What is the difference between left and right hemiplegia? +

The difference is which side of the body is affected. Both are forms of unilateral cerebral palsy, and a therapist can suggest strategies for daily tasks such as writing, dressing and eating.

Can hemiplegic cerebral palsy be diagnosed in adults? +

healthdirect says diagnosis is usually confirmed by age 2. If you are an adult with questions about a possible diagnosis, talk to your GP, who can discuss a referral to a specialist.

Is spastic hemiplegic cerebral palsy the same as hemiplegic cerebral palsy? +

Not exactly. Hemiplegia describes the one-sided pattern, and spastic describes the muscle type. Spastic cerebral palsy is the most common form overall, and your specialist can confirm which applies to you.

References

Sources

  1. Signs and symptoms of cerebral palsy — Cerebral Palsy Alliance
  2. Cerebral palsy — healthdirect Australia
  3. Types of cerebral palsy — Cerebral Palsy Alliance
  4. Cerebral palsy (Kids Health Info fact sheet) — The Royal Children’s Hospital Melbourne
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