8.1 Cerebral Palsy, Down Syndrome & Spina Bifida

Cerebral Palsy, Down Syndrome & Spina Bifida

Pediatric occupational therapy practice addresses congenital, developmental, and neurological conditions that impact a child's ability to participate in meaningful occupations, including play, activities of daily living (ADLs), education, and social interaction. Certified Occupational Therapy Assistants (COTAs), collaborating under the supervision of Occupational Therapists (OTRs), implement evidence-based motor training, postural management, environmental adaptations, and safety protocols to optimize functional independence across home, school, and community environments.

1. Cerebral Palsy: Pathophysiology & Motor Classifications

Cerebral Palsy (CP) is a group of non-progressive, permanent neurological disorders caused by injury to the developing brain during prenatal, perinatal, or early postnatal periods (typically before age 2 to 3). Although the underlying brain lesion is static, musculoskeletal deformities, contractures, and functional challenges evolve as the child grows.

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|                   CEREBRAL PALSY MOTOR CLASSIFICATIONS                      |
|                                                                             |
|   [1. SPASTIC CP]        ---> Pyramidal / Motor Cortex lesion.              |
|                               Hypertonicity, hyperreflexia, clonus,         |
|                               velocity-dependent resistance to stretch.     |
|                               Subtypes: Diplegia, Hemiplegia, Quadriplegia. |
|                                                                             |
|   [2. DYSKINETIC CP]     ---> Extrapyramidal / Basal Ganglia lesion.        |
|                               Fluctuating tone, involuntary slow writhing   |
|                               movements (athetosis) or rapid jerks (chorea).|
|                                                                             |
|   [3. ATAXIC CP]         ---> Cerebellar lesion.                            |
|                               Hypotonia, wide-based staggering gait,        |
|                               intention tremors, dysmetria, poor balance.   |
|                                                                             |
|   [4. MIXED CP]          ---> Multi-focal lesions.                          |
|                               Most commonly spastic-dyskinetic patterns.    |
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Clinical Presentation by Motor Subtype

1. Spastic Cerebral Palsy (70–80% of cases):

   • Characterized by velocity-dependent increase in muscle tone (spasticity), hyperactive deep tendon reflexes, and retention of primitive reflexes.
   • Spastic Diplegia: Bilateral lower extremity involvement greater than upper extremities. Associated with prematurity and periventricular leukomalacia (PVL). Gait exhibits a characteristic "scissoring" pattern due to hip adductor and internal rotator spasticity.
   • Spastic Hemiplegia: Unilateral involvement of the upper and lower extremities on one side of the body (upper extremity typically more impaired than lower extremity). Often results from asymmetric vascular insults or middle cerebral artery stroke in utero.
   • Spastic Quadriplegia / Tetraplegia: Total body involvement (all four extremities, trunk, neck, and oral-motor musculature). High incidence of cognitive disability, seizure disorders, visual/auditory impairments, and dysphagia.

2. Dyskinetic / Athetoid Cerebral Palsy (10–15% of cases):

   • Caused by damage to the basal ganglia (often historically linked to neonatal hyperbilirubinemia/kernicterus or hypoxic-ischemic encephalopathy).
   • Features fluctuating muscle tone ranging from hypotonia at rest to hypertonia during purposeful movement, emotional excitement, or postural stress.
   • Manifests as slow, continuous, writhing involuntary movements (athetosis) and distal joint instability. Oral-motor involvement frequently causes severe dysarthria and drooling.

3. Ataxic Cerebral Palsy (5% of cases):

   • Caused by cerebellar injury or hypoplasia.
   • Characterized by low postural tone, lack of coordinated voluntary movement, wide-based unsteady gait, intention tremor during fine motor tasks, and difficulty grading muscle force.

2. Gross Motor Function Classification System (GMFCS Levels I–V)

The Gross Motor Function Classification System (GMFCS) is a standardized 5-level system that categorizes the gross motor abilities of children with cerebral palsy, focusing on self-initiated movement, sitting, and walking across home, school, and community settings.

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|                     GMFCS LEVEL PROGRESSION (LEVELS I - V)                  |
|                                                                             |
|   Level I:   Walks without limitations; climbs stairs without rails.        |
|              Speed, balance, and coordination are mildly limited.           |
|                                                                             |
|   Level II:  Walks with limitations; climbs stairs holding handrail.        |
|              Difficulty on uneven terrain, inclines, or crowded spaces.     |
|                                                                             |
|   Level III: Walks using hand-held mobility device (canes, crutches, walker)|
|              Uses wheeled mobility for community travel / long distances.   |
|                                                                             |
|   Level IV:  Self-mobility with limitations; uses power mobility or manual  |
|              wheelchair pushed by an assistant in school and community.     |
|                                                                             |
|   Level V:   Transported in manual wheelchair in all settings; severe       |
|              limitations in head/trunk control; requires total caregiver aid|
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Comprehensive GMFCS Level Breakdown & Functional Milestones

3. COTA Interventions for Cerebral Palsy

Occupational therapy interventions for children with cerebral palsy emphasize functional independence, contracture prevention, tone management, postural control, and occupational engagement.

Therapeutic Positioning & Equipment

• Inhibiting Reflexes & Reducing Spasticity: Position the child out of abnormal reflex patterns (such as Asymmetrical Tonic Neck Reflex [ATNR], Symmetrical Tonic Neck Reflex [STNR], and Tonic Labyrinthine Reflex [TLR]).
• Side-Lyers: Facilitate hands-to-midline play, promote bilateral upper extremity use, and dampen extensor posturing by maintaining hip and knee flexion.
• Corner Chairs / Wedge Seats: Provide bilateral shoulder protraction and trunk support, preventing extensor thrust while facilitating anterior reach and visual attention.
• Prone Standers & Supine Standers: Provide weight-bearing through long bones to stimulate bone mineral density, facilitate hip joint acetabular development, stretch tight heel cords (gastrocnemius/soleus), and improve cardiopulmonary/gastrointestinal functioning.

Constraint-Induced Movement Therapy (CIMT) for Hemiplegic CP

• Protocol: The child's non-affected (unimpaired) upper extremity is constrained using a padded mitt, cast, or sling for several hours per day, while the affected upper extremity engages in intensive, repetitive, goal-directed functional motor training (shaping).
• Functional Gains: Overcomes "learned non-use", promotes cortical reorganization (neuroplasticity), and improves grasp, release, and bimanual coordination.

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|                     NEURODEVELOPMENTAL TREATMENT (NDT)                      |
|                                                                             |
|   • Key Points of Control: Proximal handling at pelvis, shoulders, and      |
|     spine to guide alignment before facilitating distal hand function.      |
|   • Tone Inhibition: Slow, gentle rhythmic trunk rotation, weight-bearing,  |
|     and slow rocking to reduce hypertonicity before active tasks.           |
|   • Tone Facilitation: Fast, irregular, or bouncing input (joint            |
|     approximation, tapping) to activate postural muscles in hypotonic areas.|
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4. Down Syndrome (Trisomy 21): Characteristics & Precautions

Down syndrome is a genetic disorder caused by the presence of a third copy of chromosome 21 (Trisomy 21). Children with Down syndrome present with unique physical, cognitive, and sensory-motor profiles.

Clinical Phenotype & Occupational Implications

• Musculoskeletal: Generalized hypotonia (low muscle tone), ligamentous laxity (joint hypermobility), short stature, short broad hands with a single transverse palmar crease (simian crease), and clinodactyly (inward curving of the fifth digit).
• Oral-Motor & Feeding: Protruding tongue, open mouth posture, weak suck-swallow-breathe coordination, narrow palate, and delayed dental eruption leading to mastication and articulation challenges.
• Cardiovascular: High incidence of congenital heart anomalies (e.g., atrioventricular septal defect), necessitating monitoring for cyanosis, rapid fatigue, and dyspnea during physical activities.
• Cognitive & Developmental: Mild to moderate intellectual disability, strong visual-spatial learning preferences, and delays in gross and fine motor milestones.

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|             CRITICAL PRECAUTION: ATLANTOAXIAL INSTABILITY (AAI)             |
|                                                                             |
|   • Definition: Increased laxity of the transverse ligament stabilizing     |
|     the C1 (atlas) and C2 (axis) vertebrae, present in 10–20% of children   |
|     with Down syndrome, creating a risk of cervical spinal cord compression.|
|                                                                             |
|   • STRICTLY CONTRAINDICATED ACTIVITIES (WITHOUT MEDICAL CLEARANCE):        |
|     1. Somersaults, gymnastics, and tumbling.                               |
|     2. Forceful neck flexion, extension, or rotational movements.           |
|     3. Trampoline jumping and diving into water head-first.                 |
|     4. High-impact contact sports (football, soccer headers, wrestling).    |
|                                                                             |
|   • EMERGENCY SIGNS OF SPINAL CORD COMPRESSION (STOP & NOTIFY IMMEDIATELY): |
|     - Sudden change in gait or loss of walking ability.                     |
|     - Progressive weakness or numbness in arms, hands, or legs.             |
|     - New onset of neck pain, stiffness, or torticollis (head tilt).        |
|     - Hyperreflexia, clonus, or spasticity.                                 |
|     - Sudden loss of bowel or bladder control.                              |
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[!CAUTION] COTA Safety Protocol for Down Syndrome: Prior to introducing gymnastic activities, rolling over wedges, or contact play, the COTA must review the medical chart to confirm radiographic cervical spine clearance for Atlantoaxial Instability (AAI). If a child exhibits new neck tilt or changes in motor control, discontinue therapy immediately and alert the OTR, school nurse, and supervising physician.

5. Spina Bifida: Subtypes, Functional Levels & Precautions

Spina Bifida is a congenital neural tube defect resulting from failure of the spine and embryonic neural tube to close completely during the first month of gestation (by day 28).

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|                        SPINA BIFIDA SUBTYPES                                |
|                                                                             |
|   [1. SPINA BIFIDA OCCULTA]  ---> Mildest form; vertebral arch defect      |
|                                   without spinal cord or meninges herniation|
|                                   Marked by skin dimple, tuft of hair, or   |
|                                   birthmark over lumbosacral region.        |
|                                                                             |
|   [2. MENINGOCELE]           ---> Sac contains cerebrospinal fluid (CSF)    |
|                                   and meninges, but the spinal cord remains |
|                                   intact within the spinal canal. Rare.     |
|                                                                             |
|   [3. MYELOMENINGOCELE]      ---> Most severe, common clinical form; sac    |
|                                   contains CSF, meninges, spinal cord, and  |
|                                   nerve roots protruding through vertebrae. |
|                                   Results in sensory and motor paralysis    |
|                                   below the level of the lesion.            |
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Functional Mobility Expectations by Lesion Level in Myelomeningocele

6. Critical Spina Bifida Precautions & Associated Conditions

Children with myelomeningocele face several co-occurring secondary conditions requiring diligent clinical surveillance and specialized occupational therapy protocols.

1. Hydrocephalus & Ventriculoperitoneal (VP) Shunt Malfunction

Approximately 80–90% of children with myelomeningocele develop hydrocephalus due to an associated Arnold-Chiari Type II malformation (downward displacement of the cerebellum and brainstem through the foramen magnum, obstructing CSF flow). Hydrocephalus is managed surgically with a Ventriculoperitoneal (VP) Shunt, which diverts excess CSF from the cerebral ventricles to the peritoneal cavity.

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|             SIGNS & SYMPTOMS OF VP SHUNT MALFUNCTION / INFECTION            |
|                                                                             |
|   [INFANTS & TODDLERS]                  [SCHOOL-AGE CHILDREN & ADOLESCENTS] |
|   • Bulging or tense anterior fontanelle • Severe, persistent morning       |
|   • Sunsetting eyes (downward gaze)       headache (worse when upright)     |
|   • High-pitched, irritable crying      • Unexplained nausea and projectile |
|   • Increased head circumference          vomiting                          |
|   • Lethargy and poor suck/feeding      • Excessive drowsiness / lethargy   |
|   • Redness or swelling along shunt tract • Personality or behavioral changes|
|   • New onset of seizures               • Deterioration in school work      |
|                                         • Diplopia (blurred/double vision)  |
|                                         • Ataxia or loss of coordination    |
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[!IMPORTANT] VP Shunt Emergency Response: Shunt failure causes rapid increases in intracranial pressure (ICP), which can lead to permanent brain damage, coma, or death if untreated. A COTA who observes persistent vomiting, lethargy, or severe headache in a child with a VP shunt must immediately notify the OTR, school nurse, and emergency medical services.

2. Severe Latex Allergy Precautions

Up to 70% of individuals with spina bifida develop severe, life-threatening IgE-mediated latex allergies due to early and frequent exposure to latex catheters, gloves, and surgical equipment in infancy.

• Latex-Safe Environment: The COTA must ensure that all therapy spaces, assessment kits, and sensory bins are 100% latex-free.
• Common Latex Items to Eliminate: Latex balloons, rubber resistance bands (TheraBand—must use non-latex vinyl bands), rubber eraser caps, rubberized pencil grips, rubber balls, adhesive bandages with latex, and standard latex examination gloves.

3. Neurogenic Bowel & Bladder and Skin Integrity

• Clean Intermittent Catheterization (CIC): Most children with myelomeningocele lack voluntary bladder sphincter control and require catheterization every 3–4 hours to prevent urinary tract infections (UTIs) and hydronephrosis. COTAs provide fine motor training, clothing adaptations (elastic waistbands, zipper pulls), and mirror positioning to promote independent self-catheterization.
• Sensory Loss & Decubitus Ulcer Prevention: Children lack sensation over the buttocks, perineum, posterior thighs, and feet. COTAs teach structured daily skin inspections (using long-handled inspection mirrors) and establish wheelchair pressure-relief routines (performing 15-second wheelchair push-ups or weight shifts every 15–30 minutes).

7. Clinical Scenario: COTA Pediatric Intervention

Clinical Case Vignette: A 6-year-old child diagnosed with spastic diplegic cerebral palsy (GMFCS Level III) attends a first-grade general education classroom. The child ambulates with a posterior rollator walker and uses an adaptive high-backed classroom chair with lateral supports. During classroom observation, the child struggles to access floor play, demonstrates tight bilateral hip adduction and internal rotation, and experiences upper extremity fatigue when writing at a standard horizontal desk.

COTA Treatment Plan & Session Protocol:

1. Workstation Adaptation:
   • The COTA introduces a 20-degree slant board to promote wrist extension and reduce compensatory cervical flexion during handwriting tasks.
   • An adaptive seating assessment is conducted to adjust the chair's footrest so hips, knees, and ankles are supported at 90 degrees with an adduction pommel to prevent severe scissoring.
2. Floor Play & Positioning:
   • The COTA introduces a corner floor chair during circle time to maintain trunk alignment, inhibit extensor thrust, and allow hands-to-midline toy manipulation alongside peers.
3. Motor Intervention:
   • The COTA utilizes slow, rhythmic trunk rotation over a large therapy ball to reduce lower extremity spasticity prior to dynamic walker navigation exercises in the hallway.
4. Outcome: The student participates in 30 minutes of continuous classroom circle time and completes tabletop drawing activities without postural fatigue or scissoring.