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Paraphasia is a feature of aphasia in which one loses the ability of speaking correctly, substitutes one word for another, and changes words and sentences in an inappropriate way. It often develops after a stroke or brain injury. The patient's speech is fluent but is error-prone, e.g. 'treen' instead of 'train'.
Paraphasia can be further sub-divided into 3 categories:
- Literal/phonological paraphasia - where more than half of the spoken word is said correctly. An example could be saying pun instead of spun.
- neologistic paraphasias - where a spoken word that is said correctly less than half the time. Occasionally the word is not said correctly at all, for example Balenti for Banana. This sometimes occurs in the speech of patients with schizophrenia.
- verbal paraphasias- occcurs where another word is substituted for the target word. A common example is saying dog instead of cat.
While low-frequency paraphasic errors can occur in normal speech, paraphasias (particularly phonological paraphasias) are considerably more common in Wernicke's aphasia and in Transcortical sensory aphasia.
- Phonemic paraphasia, also literal paraphasia - Mispronunciation, syllables out of sequence. e.g. "I slipped on the lice (ice) and broke my arm."
- Verbal paraphasia - Substitution of words
- Semantic paraphasia - The substituted word is related to the intended word. e.g. "I spent the whole day working on the television, I mean, computer."
- Remote paraphasia - The substituted word is, at most, distantly related to the intended word. e.g. "You forgot your musketeer, I mean, umbrella."
- Neologistic paraphasia - More severe mispronunciation, in which less than half the word is said correctly.
Perseverative paraphasia - previous response persists, interferes with retrieval of new responses. For an example please see the experimental case study D.L.A published by Dennis in 1976
- ↑ Dennis, M. (1976). Dissociated naming and location of body parts after left anterior temporal lobe resection: An experimental case study. Brain Language 3, 147-163.
- "I Can't Come Up with the Right Word..." by William Barr, Ph.D., ABPP
- "Semantic paraphasia" as described by Hugh W. Buckingham, Jr. and Deborah M. Rekart - Journal of Communication Disorders. Volume 12, Issue 3, 1979, Pages 197-209.
- ScienceDaily - 'Weapons Of Mass Production', I Mean, 'Mass Destruction!' How The Brain Prevents Verbal Errors, Nov 5, 2008
- Science Daily - Area Of Brain Key To Choosing Words Identified, Dec 30, 2008
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