Down Syndrome

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Down syndrome is the most common and readily identifiable chromosomal condition associated with mental retardation. It is caused by a chromosomal abnormality. For some unexplained reason, an accident in cell development results in 47 chromosomes instead of the usual 46. This extra chromosome has an impact on psychomotor, cognitive, and language development. In most cases, the diagnosis of Down syndrome is made according to results from a chromosome test administered shortly after birth.

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INCIDENCE

bulletA child with Down syndrome is born in one of 1000 live births.

bulletIt is historically associated with "advanced" maternal age, age over 35 years, but improved health and longevity may have an impact on that data.

bulletOne in 80 infants with Down syndrome have biological mothers older than 40 years.

bulletParents of any age may have a child with Down syndrome.

bulletThere is no association between Down syndrome and any given culture, ethnic group, socioeconomic status, or geographic region.

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POSSIBLE PHYSICAL CHARACTERISTICS

bulletSmall skull

bulletSlanting, almond-shaped eyes

bulletFlat-bridged nose

bulletPalmar crease

bulletShort stature, short fingers, toes, limbs, and neck

bulletTendency to be overweight

bulletSmall oral cavity, which makes tongue look large and protruding

bulletPossible delays in reflex integration

bulletSignificant delay in acquisition of major motor milestones

bulletHypotonia, with associated tendency to have loose joints and difficulty with subluxation and dislocation

bulletFloppy Infant Syndrome during infancy

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ATLANTO-AXIAL INSTABILITY (AAI):

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Individuals with Down syndrome have a tendency to have atlanto-axial instability, a condition in which there is increased mobility between the first and second cervical vertebrae. Studies suggest this condition occurs in 15% of children with Down syndrome. AAI is usually diagnosed with X-rays of the cervical spine; these X-rays are necessary, because typically there are no symptoms associated with AAI. 

bullet When symptoms occur they are typically associated with subluxation ?a partial dislocation ?of the joint between the first and second cervical vertebrae. These include:
 

bullet Changes in bowl or bladder function

bullet Difficulty walking

bullet Weakness in one or more extremity

bullet Neck pain, changes in neck posture/position, and limited range of motion

bullet Progressive clumsiness and loss of coordination

bullet Hypersensitivity

bulletPRECAUTIONARY MEASURES:
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Have X-rays on file (school nurse's office, Special Olympics office, recreation center, etc.) prior to participation in physical activity.

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Teacher, coach, or recreation director should communicate with the student or athlete's parent(s) and physician.

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It is suggested that students and athletes with Down syndrome be restricted from participation in gymnastics, diving, the butterfly stroke in swimming, the high jump, "heading" in soccer, and any warm-up exercise which places pressure on the muscles of the neck. Note: A physician may clear a student or athlete to participate.

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TEACHING TIPS:

bulletUse strong visual, tactile, auditory, and kinesthetic stimuli as clues.

bulletUse a systematic, structured style of instruction.

bulletUse short one-word and two-word verbal instructions.

bulletUse demonstration as an effective instructional tool.

bulletProvide opportunities for choice of activities to encourage decision making skills.

bulletA whole-part-whole instructional strategy may help learners process information.

bulletPeer partners may be helpful in the learning environment.

bullet"Catch 'em being good."

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Links

Down Syndrome Association

Recommended Down Syndrome Web Sites

Down Syndrome FAQ

Information Sheet Home

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Information on this sheet contains only suggested guidelines. Each person must be considered individually, and in many cases, a physician's written consent should be obtained.

With thanks to the TWU Master's Level Course, "Issues in Adapted Physical Education," taught by Kerrie Berends, Summer, 1998. Edited by Carol Huettig, Ph.D., Fall, 1998.