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OverviewAetiologyPathophysiologyClinical features and red flagsInvestigationsDifferential diagnosisManagementComplicationsMonitoring and follow-upSpecial situationsCommon pitfallsQuestionsSources
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Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.

Cerebral palsy and spasticity

Paediatrics and child health · UK scope · Sources checked 27 Aug 2026 · Clinical review pending

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Acute deterioration in cerebral palsy

New reduced consciousness, status epilepticus, aspiration, respiratory failure, shunt symptoms, severe dystonic crisis, painful hip displacement or unexplained loss of function requires urgent assessment rather than attribution to baseline disability.

Action: Use ABCDE, obtain the child's communication and emergency plan, treat pain and seizures, seek caregiver knowledge of baseline function and involve paediatrics with the relevant respiratory, neurological or orthopaedic team.

Overview

Recognise cerebral palsy early, define motor type and functional effect, investigate atypical progression and build a child-centred multidisciplinary plan for tone, pain, feeding, communication, hips and participation.

Diagnosis is clinical and developmental. Reconstruct pregnancy, birth, neonatal imaging, seizures and milestones, then observe spontaneous movement, posture, symmetry, hand use, sitting, gait and play. Document tone, strength, selective motor control, reflexes, dystonia, ataxia, contracture and pain. Standard functional classifications support communication but do not replace individual abilities and goals.

Cerebral palsy is non-progressive at the level of the original brain disturbance. Growth, lever-arm changes, contracture and changing demands can make function decline, but true regression, new sensory signs or relentless weakness requires diagnostic reopening. MRI is usually offered when aetiology is unclear; genetics is increasingly important when phenotype, family history or imaging is atypical.

Assessment is whole-child. Screen vision, hearing, speech, language, cognition, epilepsy, sleep, pain, saliva control, feeding, reflux, constipation, continence, bone health and mental wellbeing. Assume competence unless assessed otherwise and provide eye-gaze, symbols, switches or other augmentative communication so the child can participate in decisions.

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Paediatrics and child healthOriginal SBA

Progressive skill loss

A child labelled as having cerebral palsy develops steady loss of walking and new distal weakness over one year. What is the best next step?

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Sources and review status4 sources · checked 27 Aug 2026 · clinical review pending+
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.

  • NICE NG62 Cerebral PalsyRecognition, causes, associated conditions, feeding, pain and multidisciplinary care under 25.
  • NICE CG145 Spasticity Under NineteenGoal-based physical, oral, focal, intrathecal and surgical spasticity management.
  • NHS Cerebral Palsy OverviewMotor types, associated needs and treatment overview for families.
  • NICE NG127 Neurological RecognitionEarly motor delay, weakness and regression referral features.

Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes

Authoring stateComplete draftClinical stateAwaiting reviewJurisdictionUnited Kingdom

Spasticity is velocity-dependent resistance, whereas dystonia is sustained or intermittent patterned contraction. Both can sometimes help standing or transfers, so treatment needs an explicit functional goal. Physiotherapy, supported standing, positioning and orthoses preserve activity and comfort. Passive stretching alone does not overcome established bony deformity.

For generalised troublesome spasticity, oral baclofen offers sustained reduction; diazepam can act more rapidly but sedation and dependence limit long-term use. Focal botulinum toxin is paired with therapy and sometimes orthosis or casting. Intrathecal baclofen, selective dorsal rhizotomy and orthopaedic surgery require multidisciplinary selection based on goals, strength and likely loss of useful tone.

Hip surveillance measures migration before pain and dislocation occur. Feeding review includes posture, texture, duration, cough and growth; videofluoroscopy answers a defined swallowing question rather than acting as universal screening. Gastrostomy discussion should support nutrition and family life without implying oral enjoyment must always cease.

Key points

  • Cerebral palsy describes permanent disorders of movement and posture caused by a non-progressive disturbance in the developing brain; the child's manifestations and musculoskeletal consequences can change over time.
  • Classify the predominant motor pattern as spastic, dyskinetic, ataxic or mixed, then describe distribution, Gross Motor Function Classification System level and practical participation.
  • Early warning signs include abnormal fidgety movements, persistent fisting, early asymmetry, delayed milestones, abnormal tone and hand preference before one year.
  • MRI helps define timing and pattern when the cause is uncertain, but normal imaging does not exclude cerebral palsy; regression or progression demands reconsideration and often genetic or metabolic assessment.
  • Management begins with family goals, physiotherapy, occupational therapy, communication access, pain identification, nutrition, hearing, vision and education rather than reducing tone as an isolated target.
  • Before increasing tone treatment, look for pain, constipation, urinary retention, reflux, skin injury, poor seating and intercurrent infection that may be driving spasm or dystonia.
  • NICE uses oral diazepam when a rapid effect is needed and oral baclofen when a sustained effect is desired for generalised spasticity causing pain, spasm or disability.

Aetiology

01

Antenatal brain disturbance

Malformation, genetic disease, placental dysfunction, infection or antenatal vascular injury can disrupt motor-network development before birth.

02

Perinatal injury

Prematurity-related white-matter injury, arterial stroke, hypoxic-ischaemic encephalopathy or severe neonatal hypoglycaemia can produce permanent motor dysfunction.

03

Postnatal acquired injury

Meningitis, encephalitis, trauma, stroke, kernicterus or cardiorespiratory arrest during early brain development can cause cerebral palsy.

04

Unresolved or genetic mimic

Some children initially labelled cerebral palsy have a genetic, metabolic or progressive movement disorder, especially when imaging and history are atypical.

Pathophysiology

  1. 1
    Upper motor network injury

    Damage to corticospinal and descending inhibitory pathways produces weakness, loss of selective control, hyperreflexia and velocity-dependent spasticity.

  2. 2
    Dyskinetic network injury

    Basal ganglia or thalamic injury causes fluctuating dystonia and involuntary movements that vary with emotion, effort, pain and posture.

  3. 3
    Secondary musculoskeletal change

    Persistent abnormal tone and weak selective movement shorten muscle-tendon units, rotate bones and progressively restrict joints and hip containment.

  4. 4
    Activity participation interaction

    Motor impairment combines with vision, cognition, communication, pain and environmental barriers to determine independence more than tone alone.

Clinical features and red flags

Spastic pattern

Velocity-dependent increased tone, hyperreflexia, clonus, weakness and reduced selective movement affect unilateral, diplegic or whole-body distributions.

Dyskinetic pattern

Fluctuating dystonia, twisting posture and involuntary movements worsen with effort, emotion, pain and poorly supported positioning.

Early asymmetry

Persistent fisting, early hand preference, asymmetric crawling or unilateral toe standing before expected handedness suggests hemiplegic involvement.

Bulbar dysfunction

Drooling, prolonged meals, cough, wet voice, recurrent pneumonia and poor growth indicate impaired oral motor and swallow safety.

Atypical progression

Skill loss, sensory change, distal weakness or episodic decompensation indicates a mimic rather than ordinary evolving cerebral palsy consequences.

Red flags requiring action

  • Loss of acquired skills, steadily progressive weakness, new sensory loss or increasing ataxia is inconsistent with the non-progressive brain disturbance defining cerebral palsy and requires diagnostic review.
  • Persistent feeding cough, recurrent chest infection, wet voice, prolonged meals or faltering growth suggests dysphagia and aspiration risk.
  • Pain, reduced hip abduction, asymmetric posture, difficulty with hygiene or declining transfers can indicate hip migration or dislocation before a child can localise pain.

Investigations

  1. 01
    First-line multidisciplinary developmental assessmentFirst stepFirst line
    Why
    Define motor type, distribution, functional level, associated impairment and family priorities.
    Interpretation and limitations
    Repeated observation across settings is more reliable than one tone score and directs goal-based intervention.
  2. 02
    Brain MRI
    Why
    Identify malformation, white-matter injury, stroke, deep-grey injury or another explanatory pattern.
    Interpretation and limitations
    Use when cause is uncertain; normal imaging prompts phenotype-led genetic or metabolic reconsideration but does not alone exclude cerebral palsy.
  3. 03
    Hip surveillance radiography
    Why
    Measure femoral-head migration in children whose motor level and examination create displacement risk.
    Interpretation and limitations
    Trend migration percentage with abduction, pain and posture and refer through the regional orthopaedic threshold pathway.
  4. 04
    Swallow assessment and videofluoroscopy
    Why
    Evaluate aspiration and texture safety when clinical feeding features raise concern.
    Interpretation and limitations
    A specialist clinical assessment comes first; instrumental findings guide positioning, texture and tube-feeding decisions.
  5. 05

Differential diagnosis

01

Hereditary spastic paraplegia

Progressive bilateral leg spasticity, family history or relatively preserved cognition can indicate a genetic long-tract disorder.

02

Dopa-responsive dystonia

Childhood gait difficulty with diurnal fluctuation and dystonia may improve dramatically with specialist levodopa rather than conventional spasticity treatment.

03

Neuromuscular disease

True weakness, reduced reflexes, calf hypertrophy or respiratory involvement points away from an upper motor-neurone cerebral palsy pattern.

04

Spinal cord disease

A sensory level, bladder change, back pain or new asymmetric upper motor signs requires urgent spinal imaging.

05

Neurodegenerative disorder

Regression, worsening ataxia, neuropathy, organ involvement or episodic decompensation suggests metabolic or degenerative disease requiring specialist testing.

Management

01IdentifyRecognise early motor abnormalityFirst stepAn infant or child shows asymmetry, abnormal tone or delayed motor development.+
  1. 1DefinitiveRefer for developmental and neurological assessment without waiting for a definitive label.
  2. 2Arrange early therapy, hearing, vision and communication support while investigations proceed.
  3. 3Use MRI and phenotype-led genetics when history and examination leave cause uncertain.
02Set goalsTreat the whole functional problemMotor impairment affects comfort, care, activity or participation.+
  1. 1Agree measurable child and family goals across mobility, sleep, hygiene, communication and school.
  2. 2EscalationCorrect pain, constipation, seating, orthosis, feeding and environmental barriers before escalating tone medicines.

Complications

01

Hip displacement and contracture

Muscle imbalance and limited weight bearing can migrate the femoral head, shorten soft tissues and cause painful fixed deformity.

02

Aspiration and malnutrition

Oromotor dysfunction, reflux and prolonged feeding reduce safe intake and contribute to pneumonia, dehydration and faltering growth.

03

Pain and sleep disturbance

Spasm, dystonia, constipation, reflux, dental disease, pressure injury and orthopaedic deformity frequently impair comfort and family sleep.

04

Reduced bone strength

Limited loading, undernutrition, vitamin D deficiency and antiseizure medicines increase low-trauma fracture risk and complicate transfers.

05

Communication exclusion

Motor speech or access difficulty can conceal understanding and restrict education, consent and symptom reporting without augmentative support.

Monitoring and follow-up

  • Review child-defined function, pain, sleep and care goals after each therapy or medicine change.
  • Measure joint range, hip abduction, posture, spine and gait or transfer ability at planned intervals.
  • Follow the regional hip-surveillance schedule and ensure radiographs are acted upon, not merely obtained.
  • Track feeding duration, cough, respiratory infections, weight and suitable growth measures with dietetics.
  • Monitor sedation, swallow, strength and withdrawal risk during baclofen or diazepam treatment.
  • Ask directly about pain, mood, communication access, school inclusion and caregiver sleep.
  • Begin equipment, capacity, sexuality and adult-service transition planning well before transfer age.

Special situations

The lesion is static

The brain disturbance does not progress, but growth and secondary contracture can substantially alter phenotype and function.

Tone can be useful

Reducing spasticity may worsen standing or transfers when the child relies on extensor tone to compensate for weakness.

Pain drives dystonia

Constipation, reflux, hip pain or poor seating can amplify involuntary movement more than the baseline neurological disorder.

Communication reveals capacity

A motor speech impairment may conceal intact understanding until eye-gaze or another access method is provided.

Hips displace silently

Radiographic surveillance identifies migration before pain, hygiene difficulty and fixed dislocation become established.

Common pitfalls

  1. 01

    Treating tone without agreeing a functional goal.

  2. 02

    Assuming every decline is expected cerebral palsy progression.

  3. 03

    Increasing medicine before checking pain and constipation.

  4. 04

    Allowing sedation to replace participation.

  5. 05

    Waiting for hip pain before radiographic surveillance.

  6. 06

    Interpreting absent speech as absent understanding.

  7. 07

    Planning transition only when paediatric care ends.

Botulinum toxin type A is considered for focal spasticity impairing function, care, comfort or orthosis tolerance; combine it with goal-directed therapy and review effect.
  • Hip surveillance is systematic and based on clinical and radiographic risk, not merely reported pain; reduced abduction and asymmetry should accelerate orthopaedic review.
  • Assess swallowing and nutrition actively, offer augmentative communication early and plan transition before adolescence rather than waiting for paediatric services to end.
  • Rapid worsening of generalised dystonia with fever, dehydration, pain or medicine withdrawal may evolve into life-threatening status dystonicus.
  • Early hand preference before 12 months, fisting, asymmetric movement, persistent primitive reflexes or delayed sitting and walking should trigger developmental assessment.
  • Constipation, urinary retention, reflux, dental pain, fracture and poor sleep commonly worsen tone; exclude these triggers before escalating antispastic medicines.
    • Targeted genetic or metabolic testing
    Why
    Investigate regression, family history, normal or atypical MRI and unusual movement or systemic features.
    Interpretation and limitations
    Testing can replace an imprecise label and identify treatable mimics, but variants require specialist interpretation.
  • 3Coordinate physiotherapy, occupational therapy, speech and language, dietetics and education with named ownership.
    • 03Manage toneMatch intervention to distributionSpasticity or dystonia causes pain, spasm, functional loss or care difficulty.+
    1. 1Use oral medicine for generalised problems and botulinum toxin for selected focal goals.
    2. 2Review useful tone, weakness, sedation and function after every intervention rather than measuring tone alone.
    3. 3Refer refractory generalised or fixed problems for intrathecal, neurosurgical or orthopaedic assessment.
    04SurveilPrevent secondary complicationsOngoing growth changes musculoskeletal and nutritional risk.+
    1. 1Follow hip surveillance, range, spine, skin, pain, bone and respiratory pathways.
    2. 2Monitor swallow, weight, height or segmental growth and feeding time with dietetic support.
    3. 3Build transition plans for health, equipment, education, safeguarding and adult participation.
    Key medicines and prescribing safety2 treatments · regimens, roles and cautions+
    Sustained treatment for generalised spasticity that causes pain, spasms, functional limitation or difficulty with care.

    Oral baclofen

    For children aged 1–17 years, specialist initiation commonly starts around 0.3 mg/kg/day in 2–4 divided doses, increasing at about weekly intervals toward 0.75–2 mg/kg/day; usual maxima are 40 mg/day below 8 years and 60 mg/day from 8 years.

    Titrate slowly because sedation, hypotonia and weakness can remove useful function; renal impairment increases toxicity and abrupt withdrawal can cause rebound spasticity, hallucinations, seizures and hyperthermia.

    Focal treatment for dynamic spasticity impairing function, hygiene, comfort, orthosis use or hip management when a specific goal is agreed.

    Botulinum toxin type A

    Dose is calculated by product, body weight, muscle size and treatment goal within the paediatric spasticity service; units are not interchangeable between brands and the total session limit must follow that product's monograph.

    Use ultrasound or stimulation guidance where appropriate and plan post-injection therapy; warn about pain, temporary weakness and rare distant dysphagia or respiratory effects.