Subnormal intellectual functioning which originates during the developmental period. This has multiple potential etiologies, including genetic defects and perinatal insults. Intelligence quotient (IQ) scores are commonly used to determine whether an individual has an intellectual disability. IQ scores between 70 and 79 are in the borderline range. Scores below 67 are in the disabled range. (from Joynt, Clinical Neurology, 1992, Ch55, p28)
Rett syndrome -- Popular works. : Understanding Rett syndrome : a practical guide for parents, teachers, and therapists / Barbro Lindberg ; foreword by Andreas Rett
1991
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Rett syndrome -- Study and teaching. : Understanding Rett syndrome : a practical guide for parents, teachers, and therapists / Barbro Lindberg ; foreword by Andreas Rett
1991
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Rett Syndrome -- therapy. : Understanding Rett syndrome : a practical guide for parents, teachers, and therapists / Barbro Lindberg ; foreword by Andreas Rett