Development of the Child with Cerebral Palsy
- 1 Introduction
- 2 Typical Postures and Movement Strategies
- 3 Recent Related Research (from Pubmed)
- 4 References
Knowledge of typical development is essential to compare the atypical development of children with Cerebral Palsy at all stages of their development, but even more so during the early stages where imparments are often not so evident
Depending on the type of the Cerebral Palsy and Neurodevelopment Disorders, we will observe different patterns including positions and movements and different impairments.
The symptoms and function of each person with Cerebral Palsy varies. Cerebral Palsy is non-progressive so does not get worse over time, but the exact symptoms and function can change over a person's lifetime. From Birth to 5 years of age, a child should reach specific movement goals or developmental milestones - e.g. rolling, sitting up, standing, and walking which are often delayed or absent in the child with Cerebral Palsy.
Bony structures deformities or impairments are secondary due to:
- Impact of gravity on a body that has poor alignment and moves abnormally
- Abnormal muscle contraction during growth
- Lack of variety of movements and strategies e.g. weight-bearing postures  
In relation to Spasticity and Muscle Fibre, the literature supports the notion that, although spasticity is multifactorial and neural in origin, significant structural alterations in muscle also occur. An understanding of the specific changes that occur in the muscle and extracellular matrix may facilitate the development of new conservative or surgical therapies for this problem.  
Sensory and Perceptual System;
In many children with Cerebral Palsy vision is compromised in relation to postural control and movement, proprioceptive, tactile and vestibular functioning, which creates pathologic patterns and strategies to move and orient the body in space.  
Many children with Cerebral Palsy have difficulty to maintain respiration while at the same time supporting posture and movement. Infants breathe primarily with the diaphragm which sits high in the thoracic ribcage, with each inspiration, it contracts, pushing down on the abdominal contents. In the infant, the abdominal muscles are not yet working to oppose this force of the diaphragm, and the belly expands. This is called belly breathing. In addition the ribcage is elevated and the ribs horizontally positioned, making the ribcage a fairly rigid structure. This is why the ribcage remains elevated and the spine in flexion in many children with Cerebral Palsy. They have difficulty to expand the rib cage for air exchange and difficulties in exhalation of air to control the speech. The abdominal muscles fail to be used posturally to support lower trunk stability in children with Cerebral Palsy.  
Other impairments that children with Cerebral Palsy can develop are skin and digestion problems, motivation, nutrition and growth, deficit of attention, learning difficulties. You can read more about these conditions on the Physiopedia Page Cerebral Palsy Associated Conditions.
Typical Postures and Movement Strategies
This information is based on clinical observation and clinical reasoning from the evaluation and assessment of the impairments. This footage from Pathways compares the movements of two children at 2, 4 and 6 months of age: One developing typically, and one developing atypically. This film goes through 8 different positions with the two children. These videos show many of the atypical features seen in children with spasticity, athetosis, hypotonia and ataxic cerebral palsy.  
2 Month Old Baby Typical and Atypical Development
4 Month Old Baby Typical and Atypical Development
6 Month Old Baby Typical and Atypical Development
Showing Movement Types of Cerebral Palsy
The following information outlines many of the main neuromuscular, musculoskeletal, sensory and perceptual features you will see in children with quadriplegia, diplegia and hemiplegia.
|Upper Limb Observation||Lower Limb Observation|
Child try to lift the head, so recruits excessive extension of mid-thorax with poor synergy between extensors and rotators cuff of the shoulders (Supraespinous, Infraspinous, Teres minor, Subscapularis: SITS), pectoralis, rhomboids and serratus anterior. This create a specific musculoskeletal feature.
With the time and the effort of the kid to upright the head, pectoralis and latissimus dorsi contract bringing more and more the shoulder in extension and internal rotation.
In consequence the biceps brachialis is unable to do an eccentric contraction, because the elbow cannot create a base of support in the epitroclea against the gravity and align with shoulder so this create the elbow flexion.
The forearm pronators and hand flexors are not fully lengthened.
Erectors of the lumbar spine and rectus abdominus muscles are easy to recruit because they are superficial. In fact these two muscle and the pectoralis are the ones to bring the centre of mass forward to maintain the sitting position.
Impossible to rotate or dissociate Upper and Lower Limbs due to the difficulty to recruit Multifidus, Exterior and Interior Abdominal Oblique’s muscles.
Huge contraction of Hip Flexor muscles, Internal Rotators, Adductors pulling hip into dislocation or malformation of hip joint.
Tightening of Hamstrings pull pelvis into Posterior tilt.
The Antagonist Muscles; External Rotators muscles (Gluteus Maximus, Medius and Rotators) cannot co-contract in synergy because of loss of alignment of pelvis and hips. So the muscles are not in the correct anatomical position to contract correctly. Nevertheless the flexors, hamstrings and adductors have longer lever arms that enable them to contract more than their antagonist.
The child will adopt pathologic patterns in the attempt to see or play:
Head is sustained with asymmetrical hyper-extension, cervical spine is not elongated, not able to move in the 3 planes (frontal, sagittal, transverse) so often develops tightness in extensors and the loss of ROM in the upper cervical spine into flexion.
No chin tuck
Minimal upper to mid-thoracic extension
Shoulders in extension and internal/medial rotation
Ribcage Elevated with Scapula Elevated and in Abduction
Forced thoracic extension with not elongation of cervical and thoracic vertebras in the 3 planes
Forearm remains in Pronation
Wrist in Flexion and Ulnar Deviation
Finger Flexion and Thumb Adduction
Note: This pattern will correspond to a kid with a normal development of 1 month, but babies developing normally change this position by controlling the head with in 3 planes; extension, flexion, lateral flexion and rotation while pushing the surface against gravity.
The child with quadriplegia is able to extend the lumbar spine more than the thoracic and cervical spine
Hips in flexion, greater trocanter in anterior torsion and lumbar lordosis.
Legs in internal rotation and feet in pronation, hindfoot in eversion, plantar flexion and forefoot in adduction.
Gait - Scissor Pattern
Sensory and Perceptual System:
No binocular vision. The eyes are not independant from the movement of the head (like a normal child at 3 months) so perception of the environment is difficult.
The jaw remains open (extension) and the tongue retracted, coordination between them is severely compromised. Due to this poor alignment of the oral structures they will have difficulties in feeding and sound production.
Children with Quadriplegia have extreme difficulty using upper limbs, such as reaching out, grasp and release.
We have to differentiate between;
Sitting Position: Not Achievable
Upright Standing: Not Achievable
Crawling: Not Achievable
Food: With a spoon and finely minced food.
Cognition: Intellectual Imapirment
Vertical Trunk Antigravity
Sitting Position: On Tacrum with Trunk in Kyphosis and Knees Semi-Extension
Upright Standing: Possible with Upper Limbs Devices
Crawling: Possible Pathological Creeping or Crawling
Manipulation: Possible with Difficulties
Cognition: Usually Preserved
The child with diplegia will have control of the head, neck, tongue and eyes. Some have more compromise of the upper limb than others. Those with more severe involvement of the limbs may develop similar to the quadriplegic vertical trunk antigravity forms, with similar general features.   
Children with diplegia have good head control.
In prone shoulders are slightly elevated and in internal rotation.
Cervical and upper thoracic spine is extended (elongated) and the lower thoracic spine is in a position of extension (not elongated), due to the difficulty to bring shoulders into flexion with neutral rotation and push up with elbow extension and with active abdominal holding, in consequences the lower thoracic spine does not actively extend.
Lower thoracic extension is necessary to reach erect sitting and alignment for a efficient use of the weight shifting and freedom of upper and lower limbs. For diplegic kids this bi-isquiatic sitting position is difficult so they often sit in W-sitting, because it enables them to use their hips flexion, adduction and internal rotation positioning, thoracic and lumbar flexion and cervical hyperextension. W-sitting provides them a bigger base of support tan the long sitting, that’s why they enjoy it because they are able to manipulate.
The facet joints at thoracic spine can rotate (transverse plane), but the facet joints in lumbar spine are stuck in the sagittal plane enabling only flexion/extension movements, that’s why they have a lack of pelvis dissociation (frozen pelvis).
Hips are pulled to flexion, adduction and internal rotation, due to this diplegic manage to crawl with this pathologic pattern.
Children with Diplegia manage to walk in a more or less functional way.
In diplegic forms functional surgery generally is performed after the acquisition of upright position and walking.
The most common skeletal problems are femoral intrarotation, tibia extratorsion and break down of talus-scaphoid joint with valgus adducted foot.
Sensory and Perceptual System:
From the visual point of view, gaze paralysis is quite common in diplegic children particularly convergent strabismus. Which worsens the pathological motor pattern, especially during locomotion (scissor pattern) and manipulation (eye-hand-mouth coordination).
Start pulling to stand around 2 years old, independant walking around 3-5 years but they are not able to deal with stairs until 5 years, however due to secondary deformities they have early fatigue and poor motivation, the more severe cases give up walking at beginning of adolescence.
Lower limb independence dressing is difficult.
Reach quite satisfactory manipulation competence, especially in sitting position, apart from those cases in which there is also dyskinetic elements present.
The main characteristic is a reduction of the motor repertoire of the affected side especially in upper limb. Hemiplegic often have associated movements that express the relation and influence among the preserved side.   
Child with hemiplegia shows subtle asymmetries in supine position in the 2nd trimester, hemiplegic arm remains in shoulder elevation and extension.
Children with hemiplegia sits in the non-affected side, so they remain in a shortened position of the paretic trunk side and avoid weight bearing in hemiplegic side.
Many children use this posture to scoot about the floor, totally avoiding an all-fours posture.
All fours requires a more symmetrical trunk and extremities weight bearing that are difficult for hemiplegic kids. That’s why most of hemiplegic do not crawl, they use to move around using lateral sitting posture.
When they grow the hemiplegic trunk side is shortened as the cervical spine in early stages.
Upper limb remains in protraction, elbow in flexion and hand close, maybe thumb adducted. This create big difficulties to integrate the hand in ADL activities.
The child with hemiplegia controls the lower limbs in different ways;
However, there are postures that remain in the 3 different walking patterns. One is the pelvic asymmetry in the 3 planes. In the frontal plane the pelvis is elevated (craneal tilted) in the transverse plane the hemipelvis of the hemiplegic side is rotated posteriorly, in the sagittal plane hip is in flexion. The leg remain in internal rotation, knee in flexion and plantar flexion.
The differences appear in the way the kid controls the hip and leg from the pelvic position:
Functional leg length discrepancy, showing the hemiplegic side shorter because hemipelvis is elevated. In fact it might be true bony size discrepancy due to growth. This happen in stiff kids with severe hip and knee flexion, adduction and internal rotation.
The shorter leg tends to follow with internal rotation, plantar flexion and inversion with strong pull of tibialis posterior. The hemiplegic foot supinates with weight bearing.
Other type are the hemiplegic with less hip flexion and less internal rotation but knee hyperextension with weight bearing and plantar flexion, although the first contact in stance phase is with toes not with heel.
Hip in external or internal rotation, knee mobile with phases of flexion and extension and slight plantar flexion with pronation of foot. Kids with neuromuscular stiffness.
Muscle retractions and early or late bone growth alterations are more or less frequent according to the severity.
Sensory and Perceptual System:
Tactile, thermal, pain, proprioceptive… occur more in adults is not frequent in childhood hemiplegia. Although stereognosia disorders are quite frequent.
Motor impairment, perceptive alteration, neurophysiological aspects, epilepsy are all factors that affect direct with the child learning ability.
Recent Related Research (from Pubmed)
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- Emma Giles. Khan Academy - Intro to Neurodevelopment Milestones. Available from: https://www.youtube.com/watch?v=4qbb4f1I67k [last accessed 13/08/16]
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- Pathways - 6 Month Old Typical and Atypical Development Available from: https://youtu.be/sUO6baJ0FcA?list=PLyPj1_Wge_0QO1YMVAfLmeLcXYmOvcNwV[last accessed 13/08/16]
- Yvonne Frizzell; Aber Kare Institute - Showing movement Types of Cerebral Palsy Available from: https://youtu.be/eoKuveK9_So [last accessed 13/08/16]
- Ferrari A, Cioni G. The Spastic Forms of Cerebral Palsy. Springer; 2010.