Lateralization of brain function: Difference between revisions

Revision as of 23:32, 5 June 2025

Revision as of 05:51, 12 July 2025

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=== Hemisphere damage ===

Damage to either the right or left hemisphere, and its resulting deficits provide insight into the function of the damaged area. There is truth to the idea that some brain functions reside more on one side of the brain than the other. We know this in part from what is lost when a stroke affects a particular part of the brain. Left hemisphere damage has many effects on language production and perception. Damage or lesions to the right hemisphere can result in a lack of [[emotional prosody]]<ref>{{Cite journal |last1=Patel |first1=Sona |last2=Oishi |first2=Kenichi |last3=Wright |first3=Amy |last4=Sutherland-Foggio |first4=Harry |last5=Saxena |first5=Sadhvi |last6=Sheppard |first6=Shannon M. |last7=Hillis |first7=Argye E. |date=2018 |title=Right Hemisphere Regions Critical for Expression of Emotion Through Prosody |journal=Frontiers in Neurology |volume=9 |page=224 |doi=10.3389/fneur.2018.00224 |pmc=5897518 |pmid=29681885 |doi-access=free }}</ref> or intonation when speaking.<ref name="Zickert 107884">{{cite journal |last1=Zickert |first1=Nele |last2=Geuze |first2=Reint H. |last3=Beking |first3=Tess |last4=Groothuis |first4=Ton G.G. |title=Testing the Darwinian function of lateralization. Does separation of workload between brain hemispheres increase cognitive performance? |journal=Neuropsychologia |date=August 2021 |volume=159 |pagesarticle-number=107884 |doi=10.1016/j.neuropsychologia.2021.107884 |doi-access=free |pmid=34090868 }}</ref> The left hemisphere is often involved with dealing of detail-oriented perception while the right hemisphere deals mostly with wholeness or an overall concept of things.<ref name="Zickert 107884"/>

Right hemisphere damage also has grave effects on understanding discourse. People with damage to the right hemisphere have a reduced ability to generate inferences, comprehend and produce main concepts, and a reduced ability to manage alternative meanings. Furthermore, people with right hemisphere damage often exhibit discourse that is abrupt and perfunctory or verbose and excessive. They can also have pragmatic deficits in situations of turn taking, topic maintenance and shared knowledge. .<ref name="Zickert 107884"/> Although both sides of the hemisphere has different responsibilities and tasks, they both complete each other and create a bigger picture'''.'''<ref name="Zickert 107884"/>