Mental Retardation

Developmental Delay
A developmental delay is any significant lag in a child's physical, cognitive, behavioral, emotional, or social development, in comparison with norms.  More »
Gale Encyclopedia of Children's Health

Learning Difficulties
Learning disorders are academic difficulties experienced by children and adults of average to above-average intelligence . People with learning disorders have difficulty with reading, writing, mathematics, or a combination of the three. These diff...  More »
Gale Encyclopedia of Children's Health

Aphasia
Aphasia is condition characterized by either partial or total loss of the ability to communicate verbally or using written words. A person with aphasia may have difficulty speaking, reading, writing, recognizing the names of objects, or understand...  More »
Gale Encyclopedia of Medicine