Lateralization of brain function: Difference between revisions

Revision as of 08:23, 15 March 2025

Revision as of 15:34, 15 March 2025

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===Sensory processing===

Sensory informationprocessing for the left and right sides of the body is often lateralized to the [[contralateral]] hemisphere due to nerve fiber [[decussation]].

[[File:Optic processing human brain.jpg|thumb|254x254px|Partial decussation of the left and right visual hemifields.]]

In [[visual perception|vision]], [[retinal ganglion cell]]s undergo partial decussation at the [[optic chiasm]], where [[axon]]s from the nasal retinas cross to the opposite hemisphere, while axons from the temporal retinas remain on the [[Ipsilateral|ipsilateral side]].<ref>{{Cite web|url=https://theodora.com/anatomy/the_optic_nerve.html|title = The Optic Nerve - Human Anatomy | work = Photius Coutsoukis }}</ref><ref name=":0">{{Cite book |last=Bear |first=Mark F. |title=Neuroscience: exploring the brain |last2=Connors |first2=Barry W. |last3=Paradiso |first3=Michael A. |date=2016 |publisher=Wolters Kluwer |isbn=978-0-7817-7817-6 |edition=4th |___location=Philadelphia}}</ref> As a result, visual input from the left visual hemifield is processed by the right hemisphere's [[visual cortex]], while input from the right visual hemifield is processed by the left hemisphere's visual cortex.<ref name=":0" />