Cerebral Hemisphere

A cerebral hemisphere is one of the two regions of the vertebrate brain that are delineated by the median plane, (medial longitudinal fissure). The brain can thus be described as being divided into left and right cerebral hemispheres. Each of these hemispheres has an outer layer of grey matter called the cerebral cortex that is supported by an inner layer of white matter. In eutherian, i.e., placental, mammals (but not in non-eutherian mammals such as marsupials, nor in other vertebrates), the hemispheres are linked by the corpus callosum, a very large bundle of nerve fibers. Smaller commissures also join the hemispheres, both in eutherian and in other vertebrates, including the anterior commissure (which is present in marsupials), posterior commissure, and hippocampal commissure. These commissures transfer information between the two hemispheres to coordinate localized functions.

Macroscopically the hemispheres are roughly mirror images of each other, with only subtle differences (e.g. Yakovlevian torque). On a microscopic level, the architecture, types of cells, types of neurotransmitters and receptor subtypes are markedly asymmetrical between the two hemispheres. However, while some of these hemispheric distribution differences are consistent across human beings, or even across some species, many observable distribution differences vary from individual to individual within a given species.

Read more about Cerebral Hemisphere:  Embryological Development, Hemisphere Lateralization

Other articles related to "cerebral hemisphere, cerebral, hemispheres, hemisphere, cerebral hemispheres":

John F. Kennedy Autopsy - Later Government Investigations - Ramsey Clark Panel Analysis (1968)
... Distributed through the right cerebral hemisphere are numerous small, irregular metallic fragments most of which are less than 1 mm ... fragments visualized within the right cerebral hemisphere fall into two groups ... it is noteworthy that there is no evidence of projectile fragments in the left cerebral tissues or in the right cerebral hemisphere below a horizontal plane passing through the floor of the anterior fossa of the skull ...
Cerebral Hemisphere - Hemisphere Lateralization
... functions are actually distributed across both hemispheres ... areas involved in language skills, Broca's area and Wernicke's area, are in the left hemisphere ... Perceptual information is processed in both hemispheres, but is laterally partitioned information from each side of the body is sent to the opposite hemisphere (visual information is partitioned Optic ...
Middle Frontal Gyrus - Additional Images
... Position of middle frontal gyrus (shown in red) Left cerebral hemisphere seen from above Lateral surface of left cerebral hemisphere Lateral surface of right cerebral hemisphere ... gyrus is noted by red arrows Human brain forebrain (cerebrum, cerebral cortex, cerebral hemispheres, grey matter) (TA A14.1.09.002–240, 301–320, GA 9.818–826) Frontal lobe ...

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