corpus callosum


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corpus callosum:

see brainbrain,
the supervisory center of the nervous system in all vertebrates. It also serves as the site of emotions, memory, self-awareness, and thought. Anatomy and Function
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Corpus Callosum

 

in placental mammals and man, the aggregation of nerve fibers connecting the cerebral hemispheres.

The corpus callosum develops in the higher mammals from the commissure of the mantle (present in lung-fish, amphibians, reptiles, birds, and cloacal mammals) in connection with the strong development of the cerebral cortex. The fibers of the corpus callosum run mostly in a transverse direction, connecting and exchanging neural impulses between matching areas of the hemispheres. Therefore, both hemispheres together constitute a single unit. Fibers connecting different gyri in the two hemispheres also pass through the corpus callosum (for example, frontal with parietal or occipital). The fibers of the corpus callosum also send collaterals (associative fibers) to different parts of the same hemisphere.

corpus callosum

[′kȯr·pəs kə′lō·səm]
(neuroscience)
A band of nerve tissue connecting the cerebral hemispheres in humans and higher mammals.
References in periodicals archive ?
Moreover, the ratio of the width of the body to the length of the corpus callosum (B/CCL) and the ratio of the width of the body to the height of the corpus callosum (B/CCH) were evaluated in the present study.
Structural changes of the corpus callosum in mild cognitive impairment and Alzheimer's disease.
By means studies with diffusion tensor magnetic resonance imaging (dt MRI) and fiber tractography, Hoffer and Frahm (23) showed the trajectory of the fiber, and concluded that the corpus callosum may be classified in five portions from anterior to posterior, which have different fiber compositions:
3) In order to evaluate remyelination in LFB stained sections of cuprizone demyelination of the corpus callosum in the mice that received progesterone, three blinded readers scored LFB stained sections between zero and three.
The corpus callosum, a unique whitte-matter tract: anatomic features that may explain sparing in Binswanger disease and resistance to the flow of fluid masses.
Corpus callosum signal intensity in patients with bipolar and unipolar disorder.
Bilateral sensorineural deafness, partial agenesis of the corpus callosum, and arachnoid cysts in two sisters.
In MPS, these diffusely enlarged PVS affect the periventricular WM, corpus callosum, basal ganglia, subcortical WM, centrum semiovale, thalami and brain stem, resulting in the cribriform or spindle-like pattern.
The corpus callosum carries electrical signals between the brain's right hemisphere and its left.
extract) According to researchers, the study is the first to "detail Einstein's corpus callosum, the brain's largest bundle of fibers that connects the two cerebral hemispheres and facilitates interhemispheric communication.
Lead author Weiwei Men of East China Normal University's Department of Physics developed a new technique to conduct the study, which is the first to detail Einstein's corpus callosum, the brain's largest bundle of fibers that connects the two cerebral hemispheres and facilitates interhemispheric communication.
1976); in cats, this condition has been reported to be accompanied by microencephaly and hypoplasia of the corpus callosum and cerebellum (HERRMANN et al.