Bilateral Cerebral Palsy

Overview

Bilateral cerebral palsy (CP) is a type of spastic cerebral palsy in which muscle stiffness and movement problems affect both sides of the body, most often the legs more than the arms. It is a lifelong, non‑progressive disorder of the brain that occurs when the developing brain is damaged before, during, or shortly after birth.

Although CP is a spectrum, bilateral CP (often called “spastic diplegia”) accounts for roughly 30‑40 % of all cerebral palsy cases. According to the CDC, CP affects about 1 in 345 children in the United States, which translates to ≈ 30,000 new cases each year worldwide. Bilateral CP is more common in pre‑term infants (<37 weeks gestation) and those with very low birth weight (<1500 g).

Symptoms

Symptoms vary widely in severity, but the hallmark is increased muscle tone (spasticity) affecting both sides of the body. Typical features include:

• Spasticity of the lower limbs – stiffness that makes walking, running, or climbing stairs difficult; often described as a “scissor‑gait” where the knees cross.
• Variable involvement of the upper limbs – hands and arms may be less affected, but some individuals have mild to moderate spasticity in the elbows, wrists, or fingers.
• Motor milestones delay – sitting, crawling, or walking may be achieved later than peers.
• Muscle contractures – permanent shortening of muscles or tendons, especially around the hips, knees, and ankles.
• Hip subluxation or dislocation – due to imbalance between strong adductors and weak abductors.
• Gait abnormalities – toe‑walking, crouch gait, or a wide‑based “frog‑leg” stance.
• Balance and coordination problems – difficulty with fine motor tasks such as buttoning a shirt or using utensils.
• Speech and swallowing difficulties (dysarthria, dysphagia) – caused by orofacial muscle involvement.
• Seizures – occur in up to 30 % of children with bilateral CP.
• Cognitive impairment – mild to moderate intellectual disability in ~40 % of cases; some have normal cognition.
• Visual disturbances – strabismus, cortical visual impairment.
• Hearing loss – less common but reported in up to 10 % of pre‑term infants with CP.
• Pain – from muscle spasticity, joint degeneration, or orthopedic surgery.

Because the condition is non‑progressive, the brain injury itself does not worsen, but secondary complications (e.g., contractures, pain) can increase over time.

Causes and Risk Factors

CP results from damage to the immature brain. The exact timing and mechanism differ, but the most common contributors for bilateral CP are:

• Pre‑term birth – especially <37 weeks; the risk rises sharply before 28 weeks.
• Very low birth weight (VLBW) – <1500 g; associated with intraventricular hemorrhage (IVH) and periventricular leukomalacia (PVL).
• Perinatal infections – maternal chorioamnionitis, TORCH infections (Toxoplasma, Rubella, CMV, Herpes).
• Birth asphyxia – prolonged hypoxia-ischemia during delivery.
• Placental insufficiency – leading to chronic fetal hypoxia.
• Neonatal stroke or hemorrhage – especially in pre‑term infants.
• Genetic predisposition – recent genome‑wide studies suggest that up to 30 % of CP cases have identifiable genetic variants.
• Multiple gestations – twins or higher order multiples have higher rates of pre‑term delivery.

Risk factors are often inter‑related; for example, a pre‑term infant who experiences a severe IVH is at especially high risk for bilateral CP.

Diagnosis

Diagnosis is clinical but supported by imaging and developmental assessment. Typical steps:

1. Developmental Screening – Pediatricians use tools such as the Ages & Stages Questionnaire (ASQ) or the Denver Developmental Screening Test.
2. Neurological Examination – Evaluates tone, reflexes, posture, and motor milestones. The presence of spastic diplegia points toward bilateral CP.
3. Neuroimaging
   • Magnetic Resonance Imaging (MRI) – Gold standard; identifies PVL, white‑matter injury, or cystic lesions.
   • Head Ultrasound – Often used in the NICU for pre‑term infants; can detect IVH.
   • CT Scan – Less sensitive but may be used when MRI is unavailable.
4. Electroencephalogram (EEG) – Recommended if seizures are suspected.
5. Genetic Testing – Chromosomal microarray or exome sequencing in cases with unexplained CP, especially when additional anomalies are present.
6. Functional Assessments – Gross Motor Function Measure (GMFM), Manual Ability Classification System (MACS), and the Pediatric Evaluation of Disability Inventory (PEDI) help categorize severity and guide therapy.

Early diagnosis (ideally before 12 months) improves outcomes because intervention can begin during critical periods of neuroplasticity.

Treatment Options

Treatment is multidisciplinary, targeting the underlying motor impairment, preventing secondary problems, and maximizing independence.

Medical Management

• Antispasticity medications
  • Oral baclofen – First‑line; dosing titrated to effect.
  • Diazepam or clonazepam – Useful for nighttime spasticity.
  • Tizanidine – Alpha‑2 agonist, often added when baclofen insufficient.
• Botulinum toxin injections – Temporary (3‑6 months) reduction of focal spasticity in gastrocnemius, hamstrings, hip adductors.
• Intrathecal baclofen pump – Delivers medication directly to the spinal cord; indicated for severe generalized spasticity refractory to oral meds.
• Oral antiepileptic drugs (AEDs) – For children with seizures; common choices include levetiracetam, valproate, or lamotrigine.

Therapeutic Interventions

• Physical therapy (PT) – Stretching, strengthening, gait training, and use of assistive devices (e.g., ankle‑foot orthoses, walkers).
• Occupational therapy (OT) – Improves fine motor skills, ADL (activities of daily living) independence, and adaptive equipment training.
• Speech‑language pathology (SLP) – Addresses dysarthria, feeding difficulties, and alternative communication strategies (AAC devices).
• Constraint‑induced movement therapy (CIMT) – Encourages use of the less‑affected limb.
• Serial casting – Serially applied casts that gradually increase joint range of motion.

Surgical Options

• Orthopedic surgeries – Tendon lengthening, osteotomies, muscle releases, and hip reconstruction to correct contractures, deformities, and prevent dislocation.
• Selectively dorsal rhizotomy (SDR) – Neurosurgical cut of selected sensory nerve rootlets in the spinal cord to permanently reduce spasticity; best candidates are children 4–8 years with good underlying strength.

Lifestyle & Supportive Measures

• Regular aerobic exercise (e.g., swimming, adapted cycling) to maintain cardiovascular health and muscle endurance.
• Weight management – excess weight increases joint stress.
• Adaptive equipment – custom seating, standing frames, and wheelchair fitting.
• Family counseling & support groups – vital for coping and advocacy.

Living with Bilateral Cerebral Palsy

Successful long‑term management hinges on routine, teamwork, and proactive health monitoring.

Daily Management Tips

• Stretching schedule – 10‑15 minutes, 2–3 times daily; focus on hamstrings, gastrocnemius, hip adductors.
• Positioning – Use pillows, wedges, or specially designed chairs to maintain neutral joint alignment and prevent skin breakdown.
• Skin care – Inspect pressure points every 2 hours; keep skin clean and dry.
• Nutrition – High‑protein, calcium‑rich diet; consider a dietitian if feeding difficulties exist.
• Mobility aids – Properly fitted orthoses and walking devices improve gait efficiency and reduce fatigue.
• Routine medical follow‑up – At least annually with a pediatric neurologist or physiatrist; more often if new concerns arise.
• School & vocational planning – Early involvement of special education services, physical therapists, and occupational therapists to ensure accessibility.
• Psychosocial health – Encourage participation in community activities; monitor for anxiety or depression, especially during adolescence.

Transition to Adult Care

Around age 18‑21, many individuals shift from pediatric to adult services. A coordinated transition plan should include:

• Review of medical records and current medication list.
• Identification of adult neurologist, physiatrist, orthopedist, and therapist.
• Discussion of employment, independent living, and transportation options.

Prevention

Because most cases stem from events before birth, prevention focuses on maternal and perinatal health:

• Pre‑conception counseling – control diabetes, hypertension, and obesity.
• Avoid tobacco, alcohol, and illicit drugs during pregnancy.
• Regular prenatal care – early detection of infections, placental problems, or growth restriction.
• Administration of antenatal steroids for women at risk of pre‑term delivery (reduces brain injury).
• Use of magnesium sulfate for neuroprotection in deliveries before 32 weeks gestation.
• Delivery in a facility equipped for neonatal intensive care to minimize hypoxia‑ischemia.
• Vaccination against rubella, CMV, and other TORCH infections.

While not all cases are preventable, these strategies significantly lower the incidence of pre‑term birth and associated cerebral injury.

Complications

If left inadequately managed, bilateral CP can lead to several secondary problems:

• Contractures and joint deformities – leading to pain, gait deterioration, and need for surgery.
• Hip dislocation or subluxation – up to 30 % in severe cases.
• Chronic pain – from spasticity, overuse, or orthopedic issues.
• Osteoporosis – reduced weight‑bearing activity predisposes to low bone density.
• Respiratory infections – especially in those with swallowing difficulties.
• Urinary tract infections – if catheterization is required.
• Psychosocial challenges – lower self‑esteem, social isolation, and higher rates of depression.
• Seizure disorders – may become refractory if not treated early.

When to Seek Emergency Care

References

• Mayo Clinic. Cerebral Palsy – Symptoms and Causes. 2024.
• Centers for Disease Control and Prevention (CDC). Data & Statistics on Cerebral Palsy. Updated 2023.
• National Institute of Neurological Disorders and Stroke (NINDS). Cerebral Palsy Information Page. 2024.
• American Academy of Pediatrics. Early Intervention for Children With Cerebral Palsy. 2022.
• World Health Organization. Cerebral Palsy Fact Sheet. 2023.
• Gordon A, et al. “Outcomes after Selective Dorsal Rhizotomy in Children with Bilateral Spastic CP.” Journal of Neurosurgery: Pediatrics. 2022;29(3):345‑353.