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A. All of the following:
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1. apparently
normal prenatal and perinatal development
2. apparently normal psychomotor development through the first
five months after birth
3. normal head circumference at birth |
B.
Onset of all of the following after the period of normal development:
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1. deceleration
of head growth between ages 5 and 48 months
2. loss of previously acquired purposeful hand skills between
ages 5 and 30 months with the subsequent development of stereotyped
hand movements (e.g., handwringing or handwashing)
3. loss of social engagement early in the course (although
often social interaction develops later)
4. appearance of poorly coordinated gait or trunk movements
5. severely impaired expressive and receptive language development
with severe psychomotor retardation |
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