Down Syndrome :: chromosome disorders mental retardation

spate SyndromePeople with down feather syndrome are first and fore most(prenominal) human beings who arrive at recognizable carnal characteristics due to the presence of an extra chromo somewhat 21. The estimated incidence of heap syndrome is between 1 in 1,000 to 1 in 1,100 live births. severally year approximately 3,000 to 5,000 children are born with this chromosome disorder. It is believed there are close 250,000 families in the United States who are affected by bolt down syndrome. Children with Down syndrome are usually smaller, and their physical and mental developments are slower, than youngsters who do non pick up Down syndrome. The majority of children with Down syndrome function in the minor to moderate range of mental retardation. However, some children are not mentally retarded at all they may function in the minimal to low average range others may be severely mentally retarded. There is a wide variation in mental abilities and developmental progress in children with Down syndrome. Also, their motor development is slow and sooner of walking by 12 to 14 months as other children do, children with Down syndrome usually learn to walk between 15 to 36 months. linguistic communication development is also markedly delayed. It is important to note that a condole with and enriching home environment, early intervention, and integrated education efforts will have a positive influence on the childs development. Although individuals with Down syndrome have distinct physical characteristics, generally they are more similar to the average person in the community than they are different. The physical features are important to the physician in making the clinical diagnosis, but no emphasis should be rear on those characteristics otherwise. Not every child with Down syndrome has all the characteristics some may only have a few, and others may show most of the signs of Down syndrome. Some of the physical features in children with Down syndrome include fl attening of the derriere of the head, slanting of the eyelids, small skin folds at the inner corner of the eyes, down in the mouth nasal bridge, slightly smaller ears, small mouth, decreased muscle tone, loosen up ligaments, and small hands and feet. About fifty percent of all children have a gap between the first and second toes. The physical features observed in children with Down syndrome usually do not cause each disability in the child. Although many theories have been developed, it is not known what really causes Down syndrome. It has been known for some time that the risk of having