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Psychiatry- Carol > 3.4 Learning Disability > Flashcards

3.4 Learning Disability Flashcards

1
Q

What is the IQ for Mild Learning Disability?

A

50-69

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2
Q

What is the IQ for Mild Learning Disability?

A

50-69

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3
Q

What is the IQ for Moderate Learning Disability?

A

35-49

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4
Q

What is the IQ for Severe Learning Disability?

A

20-34

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5
Q

What is the IQ for Profound Learning Disability?

A

0-19

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6
Q

What % of the population has an IQ below 70?

A

3%

This is 2 SD below the mean

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7
Q

What is the IQ for Moderate Learning Disability?

A

35-49

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8
Q

What is the IQ for Severe Learning Disability?

A

20-34

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9
Q

What is the IQ for Profound Learning Disability?

A

Less than 20

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10
Q

What is the IQ for Borderline Learning Disability?

A

70+

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11
Q

What % of the population has an IQ below 70?

A

3%

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12
Q

How is IQ calculated?

A

IQ= Mental age/Chronological age x 100%

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13
Q

What is the most commonly used tool to diagnose Learning Disability?

A

Weschler Adult Intelligence Scale- WAIS

Others include: Stanford Binet, Raven’s Progressive Matrices

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14
Q

What are the features of Mild LD? (IQ 50-69)

A

Mental age 9-

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15
Q

What are the features of Borderline LD? (IQ 70-84)

A

Mental age 12-

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16
Q

What are the features of Moderate LD? (IQ 35-49)

A

Mental age 6-

17
Q

What are the features of Severe LD? (IQ 20-34)

A

Mental age 3-

18
Q

What occurs in Prader-willi 15Q mutation (paternally derived)?

A

LD
Overeating
Self-injurious behaviour

19
Q

What occurs in Velo-Cardiofacial syndrome 22Q?

A

50% have LD

increased risk of schizophrenia

20
Q

What are the trichromosomal abnormalities that cause LD?

A

Downs syndrome- Trisomy 21, IQ 30-55 (Severe-Moderate LD)
Patau syndrome- Trisomy 13
Edwards syndrome- Trisomy 18

21
Q

What occurs in cri du chat 5p mutation?

A

Microcephaly

severe/profound LD (IQ 0-34)

22
Q

What occurs in Angelman 15Q mutation (maternally derived)

A

LD
ataxia
paroxysms of laughter

23
Q

What occurs in Prader-willi 15Q mutation (paternally derived)?

A

LD
Over-eating
self-injurious behaviour

24
Q

Which sex chromosomal abnormalities are associated with LD?

A 
45XO - Turner's. LD rare 
47XXX- Trisomy X 
XXY- Klinefelter 
XYY Male- IQ may be slightly lower 
Fragile X -mutation is due to faulty FMR1 gene
25
Q

What other genetic causes of LD are there?

A 
PKU 
mucopolysaccharidoses 
neurolipidoses 
tuberous sclerosis
congenital hypothyroidism 
Lesch nyhan syndrome- X linked (eastern european jewish cluster as well as others)
26
Q

What pre-natal maternal infections are associated with LD?

A

Rubella
CMV
Toxoplasmosis

Psychiatry- Carol (25 decks)

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