Alexia without agraphia

Alexia without agraphia

Alexia without agraphia is a form of alexia which almost always involves an infarct to the left posterior cerebral artery (which perfuses the splenium of the corpus callosum and left visual cortex, among other things).

The resulting deficit will be "Alexia without agraphia" - i.e, the patient can write but cannot read (even what they have just written). This is because the left visual cortex has been damaged, leaving only the right visual cortex (occipital lobe) able to process visual information, but it is unable to send this information to the language areas (Broca's area, Wernicke's area, etc) in the left brain because of the damage to the corpus callosum. [Nolte, John. The Human Brain, 5th ed. St. Louis, Missouri: Mosby, 2002, p. 552] [cite web |url=http://www.bcm.edu/neurol/challeng/pat23/summary.html |title=Baylor Neurology Case of the Month |accessdate=2007-06-07 |format= |work=]

It is also known as "Dejerine syndrome" (after Joseph Jules Dejerine, who described it in 1892 [cite journal |author=Imtiaz KE, Nirodi G, Khaleeli AA |title=Alexia without agraphia: a century later |journal=Int. J. Clin. Pract. |volume=55 |issue=3 |pages=225–6 |year=2001 |pmid=11351780 |doi=] ), but it should not be confused with medial medullary syndrome, which shares the same eponym.

References


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Alexia (disorder) — DiseaseDisorder infobox Name = PAGENAME ICD10 = ICD10|R|48|0|r|47 ICD9 = ICD9|315.01, ICD9|784.61 ICDO = Caption = OMIM = OMIM mult = MedlinePlus = eMedicineSubj = eMedicineTopic = DiseasesDB = | Alexia (from the Greek polytonic|ἀ , privative,… …   Wikipedia

  • Dysgraphia — Classification and external resources ICD 10 F81.1, R48.8 ICD 9 …   Wikipedia

  • Corpus callosum — For the two films with this name, see Corpus Callosum (2002) and Corpus Callosum (2007) Brain: Corpus callosum Corpus callosum from above. (Anterior portion is at the top of the image.) …   Wikipedia

  • Howard Engel — |date=2007 02 21 |page=A12| accessdate=2007 02 21] From 1962 to 1978 he was married to Marian Engel, a noted Canadian writer of literary fiction who died in 1985. They had two children, twins Charlotte and William, born in 1965. Charlotte… …   Wikipedia

  • laterality — /lat euh ral i tee/, n. 1. the use of one hand in preference to the other. Cf. handedness. 2. the dominance or superior development of one side of the body or brain. [1640 50; LATERAL + ITY] * * * or hemispheric asymmetry Characteristic of the… …   Universalium

  • Aphasia — For other uses, see Aphasia (disambiguation). Aphasia Classification and external resources ICD 10 F80.0 F80.2, R …   Wikipedia

  • Expressive aphasia — Classification and external resources Broca s area and Wernicke s area ICD 10 F80 …   Wikipedia

  • Aphasia — Literally aphasia means no speech. Aphasia can apply to a defect in expression or comprehension. * * * Impaired or absent comprehension or production of, or communication by, speech, writing, or signs, due to an acquired lesion of the dominant… …   Medical dictionary

  • a|lex|i|a — «uh LEHK see uh», noun. a cerebral disorder characterized by loss of the ability to read, or to read aloud; word blindness (contrasted with agraphia). ╂[< New Latin alexia < Greek a without + léxis speech < légein speak; patterned on… …   Useful english dictionary

  • Alien hand syndrome — Classification and external resources ICD 9 781.8 MeSH D055964 Alien hand syndrome ( …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”