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====Wernicke====
[[Germany | German]] [[physician]] [[Karl Wernicke]] followed up on the work done by Broca by studying language deficits unlike those shown by Broca's aphasics. Wernicke noticed that not all deficits were in speech production, but rather linguistic. He found that damage to the left [[Anatomical terms of ___location | posterior]], superior [[temporal lobe | temporal]] [[gyrus]] resulted in deficits in language comprehension rather than speech production. This region is now referred to as [[Wernicke's area]], and the associated syndrome is known as [[Wernicke's aphasia]], for his discovery.
====Advance in Imaging Technique====
All these seminal works on hemispheric specialization were done on patients and/ or postmortembrains, raising questions about the facts in healthy subjects. Nowadys, new methods perit the in vivo comparision of the hemispheres in healthy subjects. Particularly, magnetic resonance imaging (MRI) and positron emission tomography (PET) are of importance becuase of good spatial resolution they supply.
===Handedness and language===
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#{{anb|Dehaene}}Dehaene S, Spelke E, Pinel P, Stanescu R, Tsivkin S. Sources of mathematical thinking: behavioral and brain-imaging evidence. Science. 1999 May 7;284(5416):970-4. PMID 10320379
#{{anb|Levy}}Levy LM, Reis IL, Grafman J. Metabolic abnormalities detected by 1H-MRS in dyscalculia and dysgraphia. ''Neurology''. 1999 Aug 11;53(3):639-41. PMID 10449137
Goulven Josse, Nathalie Tzourio-Mazoyer (2003) Review: Hemispheric specialization for language. Brain Research Reviews 44 1-12.
==Further reading==
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