A defect or loss of expression by speech, writing, signs, or of comprehending spoken or written language, as a result of injury or disease of the brain centers: Dr. Thompson, the new doctor at the speech clinic, specialized in working with clients who were suffering from aphasia.

Both survivors of the industrial explosion suffered aphasia and were unable to communicate to others or even to understand what was being communicated to them.

Impairment in the understanding of auditory language and communication, including the inability to write from dictation in the presence of normal hearing: Acoustic aphasia consists of sounds that are heard but which convey no meaning, however spontaneous speech, reading, and writing are supposedly not affected.

An aphasia in which the principal deficit is difficulty in naming people and objects which they have seen, heard, or felt; due to lesions in various portions of the language area.

The inability to name objects or to recognize written or spoken names of objects: Because of his stroke, the patient suffered anomic aphasia and was unable to recognize the printed or spoken words for names of people, places, or things.

A form of aphasia in which the patient understands spoken and written words, is aware of his deficit, and can speak and write, but skips or repeats words, or substitutes one word for another (paraphasia).

Word repetition is severely impaired.

A type of partial or total loss of language skills as a result of brain damage: Patrick had ataxic aphasia and could not speak well enough to be understood and even his writing was so unrecognizable that no one could determine what he was trying to communicate.

A type of aphasia in which there is a deficit in speech production or language output, often accompanied by a deficit in communicating by writing, signs, etc.

1. Aphasia characterized by fluent but meaningless speech and severe impairment of the ability to understand spoken or written words.
2. A condition in which speech is well articulated (usually 200 or more words per minute) and grammatically correct, but which is lacking in content and meaning.

1. Total aphasia involving all the functions that go to make up speech and communication.
2. A condition in which all aspects of speech and communication are severely impaired.

At best, patients can understand or speak only a few words or phrases; however, they cannot read or write.

1. Aphasia that is characterized by fluent but meaningless speech and severe impairment of the ability to understand spoken or written words.
2. Aphasia in which there is impairment in the comprehension of spoken and written words, associated with effortless, articulated, but paraphrastic (expressing the same message in different words), speech and writing.

Malformed words, substitute words, and neologisms (newly invented words) are characteristic. When severe, and speech is incomprehensible, it is called "jargon aphasia".

The patient often appears unaware of his deficit.

The utterances, or speaking, of meaningless phrases; either neologisms, or incoherently arranged known words.

Aphasia in which expressions by speech, or writing, is severely impaired.

Loss of the ability to name an object clearly seen until it has been perceived through some other sense; such as hearing, touching, smelling, or tasting.

Aphasia in which there is impairment in the comprehension of spoken and written words, associated with effortless, articulated, but paraphrasic, speech and writing.

Malformed words, substitute words, and neologisms are characteristic.

When severe, and speech is incomprehensible, it is called "jargon aphasia". The patient often appears unaware of his/her deficit.

An aphasia in which the unaffected motor and sensory language areas are isolated from the rest of the hemispheric cortex.

This condition is subdivided into transcortical sensory and transcortical motor aphasias.

A form of receptive aphasia in which there is an inability to understand written language.

1. Aphasia characterized by fluent but meaningless speech and severe impairment of the ability to understand spoken or written words.
2. The loss of the ability to comprehend language coupled with the production of inappropriate language.