Corpus callosum

Corpus callosum
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Corpus callosum from above. (Anterior portion is at the top of the image.)
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Median sagittal section of brain (person faces to the left). Corpus callosum visible at center, in light gray
Details
Part ofHuman brain
PartsGenu, trunk, splenium
Identifiers
MeSHD003337
NeuroNames191
NeuroLex IDbirnlex_1087
TAA14.1.09.241
FMA86464
Anatomical terms of neuroanatomy

The corpus callosum is part of the brain in humans and other eutherian mammals. It is the largest connective pathway in the brain. Its over 200 million nerve fibers connect the left and right hemispheres of the brain.

The corpus callosum relates to the lateralization of brain function. Because the two side of the brain communicate so intensively, they can afford to specialise in doing somewhat different things.[1]

Only in higher mammals

The corpus callosum is found only in placental mammals (the eutherians). It is absent in monotremes and marsupials,[2] and other vertebrates such as birds, reptiles, amphibians and fish.[3]

Other groups do have brain structures that allow for communication between the two hemispheres. The anterior commissure serves as the main cross-hemisphere communication in marsupials.[4][5][6]

The fibrous bundle of the corpus callosum increases to such an extent in humans that it wedges apart the hippocampal structures.[7]

Other Languages
العربية: جسم ثفني
asturianu: Cuerpu callosu
brezhoneg: Korf karnek
català: Cos callós
español: Cuerpo calloso
Esperanto: Kaloza korpo
français: Corps calleux
한국어: 뇌량
Bahasa Indonesia: Korpus kalosum
italiano: Corpo calloso
עברית: כפיס המוח
magyar: Kérgestest
Nederlands: Corpus callosum
日本語: 脳梁
norsk nynorsk: Hjernebjelk
português: Corpo caloso
svenska: Hjärnbalken
Türkçe: Corpus callosum
українська: Мозолисте тіло
中文: 胼胝体