Exam 2 Flashcards
ID IDEA definition
characterized by significant limitations in intellectual functioning
has significant limitations in adaptive behaviors as expressed in conceptual, social, and practical adaptive skills
manifests itself before age 18 (during the developmental period)
must adversely affect educational performance
ID prevalence
8.9%
in 100 students, you might have 1 student with this disability
4 levels of ID - MILD
largest group
anywhere up to 85% of students w/ this disability
in the public schools
4 levels of ID - MODERATE
also in the public schools
in full time special education
4 levels of ID - SEVERE AND PROFOUND
these students often have multiple disabilities
placed in alternative schools
Causes of ID
Prenatal - chromosomal disorders, inborn errors of metabolism, developmental disorders of brain formation, environmental influences
Perinatal - anoxia, low birth weight, infections
Postnatal - biological, psychosocial
Down Syndrome
prenatal cause of ID, chromosomal disorder
most common form of ID that is present at birth; not transmitted genetically
an anomaly of the 21st set of chromosomes - a triplet rather than a pair; also called trisomy 21
thick epicanthal folds in corners of eyes, making eyes appear to slant upwards; small in stature; decreased muscle tone; hyper-flexibility of joints; small mouth; short and broad hands; heart defects; susceptibility to upper respiratory problems
IQ - moderate range
risk increases w/ age of mother (mostly); can also include age of father, exposure to radiation, and some viruses
Fragile X Syndrome
prenatal cause of ID, chromosomal disorder
second most common form of ID
associated w/ the X chromosome in the 23rd pair; bottom of X chromosome is pinched off in some of the blood cells
occurs less in females than in males
large head; large, flat ears; long, narrow face; prominent forehead; broad nose; prominent, square chin; large hands
usually in the moderate range of intellectual disabilities
some, especially females, score in the normal range of intelligence
Prader-Willi Syndrome
prenatal cause of ID, chromosomal disorder
inherited from father, minority from mother
infants lethargic and have difficulty eating
about 1, obsessed w/ food
leading genetic cause of obesity
short stature; heart defects; sleep disturbances; scoliosis
fall w/in mildly intellectually disabled range
some w/ IQs in the normal range
Williams Syndrome
prenatal cause of ID, chromosomal disorder
absence of material on the 7th pair of chromosomes
intellectual disabilities in mild to moderate range
often have heart defects; unusual sensitivity to sounds; “elfin” facial features
typically occurs w/out any prior family history
people who have it CAN pass it on
Phenylketonuria (PKU)
inborn error of metabolism, prenatal cause of ID
inability to convert phenylalanine to tyrosine
results in abnormal brain development
put on special diets to prevent it
Microcephalus
developmental disorder of brain formation, prenatal cause of ID
head is abnormally small and conical in shape
ID ranges from severe to profound
life expectancy is short
Hydrocephalus
developmental disorder of brain formation, prenatal cause of ID
results from accumulation of cerebrospinal fluid inside or outside the brain
results in excessive pressure on the brain and enlargement of the skull
degree of ID depends on how early diagnosed
treated w/ surgical placement of a shunt that drains excess fluid to abdomen, or insertion of device that causes fluid to bypass the obstructed area
environmental influences on ID
maternal malnutrition
fetal alcohol syndrome - abnormal facial features, growth retardation, ID
infections in mother - rubella (German measles): potential cause of blindness and ID, most dangerous during first trimester of pregnancy
anoxia
perinatal cause of ID
complete deprivation of oxygen during delivery
low birth weight
perinatal cause of ID
can result in a variety of behavioral and medical problems
usually defined at 5.5 lbs or lower
infections passed during childbirth
perinatal cause of ID
syphilis
herpes simplex