Problems that may be experienced can involve grammar (syntax and/or morphology), semantics (meaning), or other aspects of language.

Current data indicates that 7% of young children display language disorder,[2][3] with boys being diagnosed twice as often as girls.

[4] Preliminary research on potential risk factors have suggested biological components, such as low birth weight, prematurity, general birth complications, and male gender, as well as family history and low parental education can increase the chance of developing language disorders.

[6] These results are consistent with the poorer prognosis for receptive language impairments that are generally accompanied with problems in reading comprehension.

[9] Treatment options include: language therapy, special education classes for children at school, and a psychologist if accompanying behavioral problems are present.

Expressive aphasia is characterized by partial loss of the ability to produce language, although comprehension generally remains intact; it is typically a result of stroke, trauma, or tumors.

This acquisition usually follows a normal neurological development and is brought about by a number of causes such as head trauma or irradiation.

[18] The type of language dysfunction that occurs is dependent upon the site, extent, and cause of the brain damage.

[20] Symptoms of aphasia vary widely but generally are defined by language deficits that affect fluency, the ability to talk, reading, writing, and comprehension.

[19][12] There are many types of aphasia that vary in symptoms depending upon where in the language center of the brain the damage occurred.

[12] The most frequent causes of head injury include motor vehicle accidents, assault, gun related incidents, and falls,[23] TBI is categorized as either mild, moderate or severe[23] and can affect cognitive, psychosocial, and linguistic skills.

[12] Language skills that may be affected include comprehension, motor output, word finding, and difficulties with reading.