Cerebral palsy describes a neurological disorder in which damage to the brain
affects the ability to control muscles and coordinate movement. Most cases of
cerebral palsy are classified as congenital, meaning present at birth, caused by
brain damage sustained during fetal development or delivery. Acquired cerebral
palsy occurs from brain damage caused by infections or injury during the first
few months or years of life. Although present at birth, signs of cerebral palsy
may be difficult to detect, especially in mild cases, but most cases are
diagnosed by the age of 1 or 2 years .
Infants with cerebral palsy exhibit developmental delays. Some fail to reach
major milestones, such as rolling over, sitting up or crawling during the time
frames specified by pediatricians. Although all children develop at their own
pace, the inability to control the head or lift the chest up while lying on the
stomach, by 5 months of age, may indicate cerebral palsy, according to the
Pennsylvania Child Welfare Training Program. In addition, the inability to reach
for, or transfer, objects from one hand to the other by 7 months of age may
indicate cerebral palsy.
Some children may seem to reach developmental milestones on time, but may
exhibit abnormal patterns while mastering the new skills. For example, an infant
who uses only one hand when playing with a toy, or if her hand trembles while
reaching for a toy, may suffer from cerebral palsy. Infants who use their hands
and arms well, but drag their legs may show signs of cerebral palsy. Others
learn to walk on schedule, but may walk on their tip toes, which is a sign of
cerebral palsy.
Infants with cerebral palsy may exhibit hypotonia, a significant loss of
muscle tone. Hypotonia makes the muscles appear loose or floppy. Hypotonia
contributes to the inability to control the head and other signs of delayed
development.
Cerebral palsy also causes hypertonia, which is an excessive degree of muscle
tone. Infants displaying hypertonia have tight and stiff muscles that constrict
movement. Signs of hypertonia include keeping the hands fisted, keeping the legs
extended and crossing the legs or ankles. In addition, those infants who kick
both legs in unison, instead of one at a time, may exhibit signs of cerebral
palsy. Difficulty changing a diaper due to hips that are tight, making it
difficult to separate the legs, is a sign of hypertonia and cerebral palsy.
Hypertonia also affects the tongue, causing tongue thrusts and excessive
drooling.
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