Down Syndrome Essay Research Paper Down SyndromeDown
Down Syndrome Essay, Research Paper
Down Syndrome
Down Syndrome, which used to be called mongolianism, is a congenital
deformity accompanied by moderate to severe mental deceleration, is caused
by a chromosomal abnormalcy.
Peoples with Down syndrome are frequently short in tallness and have a little,
unit of ammunition caput with a high, flattened brow and split, dry lips and lingua. A
typical characteristic is a crease of tegument, the epicanthic crease, on either side of the span
of the olfactory organ. The thenar show a individual transverse fold and the colloidal suspensions have a
consecutive fold from the heel to the infinite between the first and 2nd toes.
These people are besides capable to inborn bosom defects and tend to develop
leukaemia. Their intelligence quotient, IQ, normally ranges between 20 and 60,
but with early intercession and proper instruction, some people reach higher
degrees.
The overall incidence of Down syndrome is about one in 700
births, but the hazard varies with the age of the female parent. The rate of Down
syndrome in kids born to 25 twelvemonth old female parents is about 1 in 2000,
but the hazard increases to 1 in 200 for 35 twelvemonth olds and more than 1 in 40 for
adult females older than 40 old ages. Prenatal trials such as amniocentesis and chorionic
villus trying can be used to observe the chromosomal abnormalcy doing
Down syndrome. In add-on, maternal blood trials can propose the presence of
a foetus with Down syndrome when degrees of alphafetoprotein are lower than
usual, or when degrees of odd estriol and human chorionic gonadotropin
are unnatural.
The chromosomal abnormalcy involved in most Ca
Es of Down
syndrome is trisomy 21, or the presence of three transcripts of the 21st
chromosome. As a consequence, the affected individual has 47 chromosomes in all organic structure
cells alternatively of the normal 46, although how this causes the status & # 8217 ; s
symptoms is non yet known. Scientists assume that the ground for the abnormal
chromosomal combination is the fertilisation of an egg cell holding 24
chromosomes by a sperm with a normal mixture of 23, but they have besides
found that the sperm can transport the excess chromosome every bit good. The unnatural
egg cell or sperm is derived from a source cell in which the brace of 21st
chromosomes holds together and passes into the same sperm or egg cell alternatively
of dividing. In the type of Down syndrome called translocation, the excess
chromosome 21 stuff is attached to one of the other chromosomes ; when
some, but non all, of the organic structure & # 8217 ; s cells carry an excess chromosome 21, the
status is a type of Down syndrome called mosaicism.
Down syndrome is non yet antiphonal to medical intervention, but better
medical attention of the attach toing upsets and infections now consequences in an
about normal life span alternatively of the old life anticipation of about 14
old ages. The badly retarded may still be institutionalized, but many Down
syndrome kids are raised at place, where their full potency can be
developed. Although, with an mean mental age of about eight old ages, they
continue to necessitate a protective environment, many grownups with Down syndrome
work in sheltered workshops ; some hold regular occupations in concern and industry.
Bibliography
www.downs.com
www.americahealth.net