What is the recommended systematic neurological examination for children with cerebral palsy?

Neurological Examination in Children with Cerebral Palsy

The recommended systematic neurological examination for children with cerebral palsy should utilize the Hammersmith Infant Neurological Examination (HINE) as the primary standardized tool, with age-specific assessment protocols based on whether the child is younger or older than 5 months corrected age. 1

Age-Specific Examination Protocols

For Infants <5 Months Corrected Age

The neurological examination should combine:

• Hammersmith Infant Neurological Examination (HINE) - 90% sensitivity for detecting CP risk. Scores <57 at 3 months are 96% predictive of CP 1
• Prechtl Qualitative Assessment of General Movements (GMs) - 98% sensitivity, specifically assessing for absent fidgety movements 1
• These standardized assessments should be combined with neuroimaging (MRI when feasible) and clinical history 1

For Infants >5 Months Corrected Age

The examination protocol shifts to:

• HINE remains the primary tool - Scores <73 at 6,9, or 12 months indicate high CP risk (90% sensitivity) 1
• Developmental Assessment of Young Children (DAYC) - 83% C index for motor assessment 1
• MRI continues to provide 86-89% sensitivity when safe and feasible 1

Essential Clinical Examination Components

Motor Dysfunction Assessment (Required Criterion)

The examination must document:

• Quality of movement abnormalities: Reduced or neurologically abnormal movements, including early observable hand asymmetry 1
• Motor milestone delays: Head lag, inability to sit by 9 months, inability to grasp, not reaching for toys at appropriate ages 1
• Asymmetries: Particularly important for detecting unilateral CP, where children may score within normal ranges on standardized tests but complete tasks one-handed 1

Critical pitfall: In milder presentations, especially unilateral CP, infants may score within normal ranges on standardized motor assessments while still displaying abnormal movements. An infant with hemiplegia might obtain normal fine-motor scores but complete assessment one-handed. Therefore, skilled clinical observation of movement quality is essential beyond standardized scoring 1.

Motor Type Classification

Document the following clinical signs (recognizing these may emerge and change during the first 2 years):

1. Spasticity (85-91% of cases): Increased tone, hyperreflexia, clonus
2. Dyskinesia (4-7%): Dystonia and athetosis, involuntary movements
3. Ataxia (4-6%): Coordination difficulties, tremor
4. Hypotonia (2%): Reduced tone 1

Topographic Distribution

Classify as:

• Unilateral (hemiplegia): 38% of cases
• Bilateral diplegia: Lower limbs more affected than upper limbs (37%)
• Bilateral quadriplegia: All 4 limbs and trunk affected (24%) 1

Severity Assessment Using HINE

For predicting ambulatory potential:

• HINE scores ≥40: Likely ambulant
• HINE scores <40: Likely non-ambulant 1

This should be combined with MRI findings:

• White matter injury (WMI) patterns suggest better ambulatory prognosis
• Gray matter injury (GMI) patterns suggest poorer ambulatory prognosis 1

Screening for Associated Impairments (Mandatory)

The neurological examination must include systematic screening for common comorbidities:

• Vision assessment: 11% have functional blindness 1
• Hearing evaluation: 4% have hearing impairment 1
• Epilepsy screening: 35% prevalence - EEG only if seizures suspected, not routine 2, 3
• Cognitive/intellectual assessment: 49% have intellectual disability 1
• Speech and language evaluation: Important given 3 in 4 will talk 1
• Musculoskeletal examination: 28% develop hip displacement 1

Important caveat: EEG should NOT be performed routinely but only when there are features suggestive of epilepsy or specific epileptic syndromes 2, 3.

Functional Classification Systems

Beyond the neurological examination, document functional status using:

• Gross Motor Function Classification System (GMFCS): Most widely used for motor function 4
• Manual Ability Classification System (MACS): For upper limb function 4
• Pediatric Evaluation of Disability Inventory (PEDI): For comprehensive functional assessment 4

Note on timing: GMFCS classification in children <2 years is less reliable, with almost half having their classification changed. More accurate classification occurs after age 2 years 1.

Spasticity Assessment

When spasticity is present, quantify using:

• Ashworth Scale: More frequently used in clinical practice than Tardieu test 4

Examination Frequency and Monitoring

The neurological examination is an ongoing process, not a one-time assessment. Regular monitoring is essential because:

• CP is a changing disorder with limitations that may not be evident early but manifest in school age or later 5
• Motor types and topography may emerge and change during the first 2 years 1
• Spasticity onset may occur after age 1 year 1

Key Clinical Reasoning Points

The diagnosis of CP is clinical, based on combination of clinical and neurological signs, typically confirmed between 12-24 months, though high-risk designation can occur much earlier 1. The examination should always combine:

1. Detailed medical history (conception, pregnancy, birth, postneonatal period)
2. Standardized neurological assessment (HINE preferred)
3. Standardized motor assessment (age-appropriate)
4. Neuroimaging when indicated
5. Screening for associated impairments 1

Congruent abnormal findings across multiple assessment modalities provide the highest diagnostic accuracy - a trajectory of abnormal assessments combined with abnormal MRI is more accurate than individual assessments in isolation 1.