Cerebral Palsy Part 1 Flashcards
What causes CP?*
Due to static lesion in CNS occurring
during pre/peri/neonatal periods!
Actual manifestations, or presentation will
change over time
Five essential elements:
– Group of disorders
– Permanent but not unchanging
– Disorder of movement and/or posture and motor function (SUPER IMPORTANT)
– Due to non-progressive etiology
– Etiology arises in developing/immature brain
CP is the most common cause of
physical disability
in developed countries
Prevalence over time?
Not declined because many more babies survive after born prematurely like 24 week gestation due to technology
Prenatal Associated Factors
- Prenatal Malnutrition
- Poor Maternal Prenatal Condition
• Maternal Infection*
- Urinary tract infections
- Viral Infections (Rubella, Cytomegalovirus)
- Intrauterine infection – Causes fetal inflammation leading to CNS damage
• Multiple Gestation (placenta providing nutrition for multiple babies)
• Genetic/chromosomal anomalies• Thyroid disorder and treatment with
thyroid hormone
• Treatment with estrogen, progesterone
• Seizure disorder
• Bleeding in third trimester (prenatally born babies receive 02 support which put pressure on their vulnerable vessels, causing them to bleed)*
Perinatal Risk Factors
– Preterm births
– High or Low birth weight
Postnatal factors
– Trauma (dropping) – Near Drowning – Shaken Baby Syndrome – Infections – Infectious and toxic substances exposure – Tumors
Three types of lesions:
– Hemorrhage
– Encephalopathy from anoxia/hypoxia
– Brain malformations
Prevention:
For encephalopathy
therapeutic hypothermia
reduces infant mortality and major
neurodevelopmental disability
Prevention: during premature labor to decrease frequency mod-severe CP in preterm infants
Maternal administration of magnesium sulfate
Prevention: in vitro fertilization
Avoidance of multiple embryo implantation
Topographic Distribution (4)/ distribution of tone
– Monoplegia
– Diplegia (more tone in LE than UE)
– Hemiplegia
– Quadriplegia
Spastic CP: where in brain and presentation
motor cortex, white matter projections
– spasticity and hyperreflexia resulting in atypical posture
and movement
Dyskinetic CP: where in brain and presentation
basal ganglia
– Dystonia - involuntary sustained or intermittent m. contraction with repetitive movements and atypical posture
– Athetosis - involuntary distal writhing movement, poorly graded proximal voluntary movement, underlying hypotonia
Ataxic CP: where in brain and presentation
cerebellum
– Lack of normal or expected voluntary movement (weak core, so strengthen their core)
Mixed CP: presentation
– Spasticity and dyskinesia
GMFCS level 1* : walks with, limitations in
– Walks without restrictions
– Limitations in more advanced gross motor skills (speed, balance, coordination)
GMFCS level 2* : walks with, limitations in
– Walks without assistive devices
– Limitations walking outdoors and in the community (uneven terrain, jumping, need person support them on stairs)
GMFCS level 3* : walks with, limitations in
– Walks with assistive mobility devices (crutches, canes, wheelchair)
– Limitations walking outdoors and in the community (walks stairs with supervision, creep on stomach without leg movements)
GMFCS level 4* : walks with, limitations in
Self-mobility with limitations (creep and crawl on short distances. Physical assist one or two persons required. Powered wheelchair is best for them)
– Transported or used power mobility outdoors and in the community
GMFCS level 5*: walking ability, limitations
– Self-mobility is severely limited even with use of assistive technology
Prognosis: Growth Curves
90% potential reached at 3 years for Level V
and at 5 years for Level I
Strongest predictor of walking ability for all types of CP
Cognitive functioning
CP correlated with presence of (3)
Visual and hearing impairments and
epilepsy
By Age 8: Plegias Diagnosis and prognosis for functional ambulation percentages
– Mono/Hemiplegia - 100%
– Diplegia – 60-90%
– Quadriplegia – 0-70%
By Age 8: Prognosis for functional ambulation with motor function Best predictor
– Sit independently by 2 – GOOD Best predictor
• If not sitting by 3, POOR (important to sit due to postural control, indicates great chance for child to walk)
Spasticity definition
velocity-dependent resistance of
muscle to stretch, excessive inappropriate
involuntary muscle activity
What leads to spasticity for people with CP
UMN injury leads to decreased cortical input to reticulospinal and corticospinal tracts.
Loss of descending inhibitory input through reticulospinal tract increases excitability of alpha motor neurons (extrafusal) and gamma motor neurons (intrafusal) leading to spasticity
Hypoextensibility of Muscle with CP patients
• Mechanical changes in muscle
– Resistance to passive stretching at a
shorter length than normal muscle
• Contractures – Accumulation of collagen in muscles – Decreased muscle performance – Muscle Imbalance – 2 joint muscles