Rare diseases {autism}| can involve abnormal development before 2.5 years old.
symptoms
Autistic children have stereotyped hand movements and facial grimaces. They withdraw from adults. They do not make friends with other children. They do not develop social responses or relationships. They have little eye contact. They do not adapt easily to new situations. They are obsessive. They strongly attach to favored objects. They cannot classify emotional responses. They cannot imagine others' mental states {mind blindness}. They have difficulty pretending.
biology
Autistic children typically have below-normal intelligence. Perhaps, bilateral hippocampal lesions, limbic-system and vestibular-nuclei abnormalities, brain injury, or chromosome-7 HOXA1-gene damage causes autism.
gender
Autism is more in boys than in girls.
Biological Sciences>Medicine>Disease>Kinds>Organ>Nerve>Retardation
4-Medicine-Disease-Kinds-Organ-Nerve-Retardation
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Date Modified: 2022.0224