The mutation, which was identified in three Arab - Israeli sisters
with severe mental retardation, is one of only a handful of genes outside the X chromosome that have been linked to intellectual disability.
Rubella led to various birth defects including blindness, deafness and
severe mental retardation as well as miscarriages and stillbirths across Europe and the U.S. in the 1960s.
Imbecile was a medical term used to describe a person with moderate to
severe mental retardation, as well as for a type of criminal.
This disorder appears to cause a wide range of effects from subtle intellectual and behavioural problems to
severe mental retardation.
Untreated, this genetic condition leads to brain damage and
severe mental retardation.
Diagnoses can range from minor learning problems to autism and
severe mental retardation to a range of emotional and behavioral disabilities.
SHOP @ USC class offers vocational training for special education students — those with significant disabilities, students on the autism spectrum, and students with moderate to
severe mental retardation.
Exclusion criteria: incapacitating psychosis; profound or
severe mental retardation.
In the UK, severe learning difficulties are broadly comparable with moderate intellectual disabilities (Australia / New Zealand), moderate to
severe mental retardation or trainable mentally retarded (US / Canada) and moderate to severe general learning disabilities in Ireland.
Though his parents suspected autism or
severe mental retardation to be the cause of his behavior, Dibs emerged to find himself through play therapy over the course of several months.
No child psychiatric diagnoses were exclusionary with the exception of moderate or
severe mental retardation or psychosis.