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Cerebrum - central sulcus contains areas for somatosensory...

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Cerebrum The cerebrum comprises about 83% of total brain volume, but more than half of the neurons in the brain are found in the cerebellum . In cross section, the cerebrum appears to have distinct colorations. The gray matter found on the outer portion of the cerebrum consists of dendrites and cell bodies of neurons. This outer gray matter is known as the cerebral cortex . The cortex is highly convoluted with extensive folds that significantly increase the amount of brain tissue that can be packed into the volume of the cranial case. The high points of the folds are called gyri and the indentations are sulci . The cerebrum can be divided into four distinct lobes. These lobes can be identified functionally as well as anatomically. The frontal lobe (shown in blue) controls voluntary motor functions and contains areas for planning, mood, smell and social judgment. It is located just in front of a major sulcus known as the central sulcus. The parietal lobe, shown in purple and located behind the
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Unformatted text preview: central sulcus, contains areas for somatosensory reception, taste and integration of sensory information. The occipital lobe, shown in green, is at the very back of the brain. It is the visual center of brain where all information coming from the eyes is processed. The temporal lobe, which sits below the frontal and parietal lobes below the lateral sulcus, contains areas for hearing, smell, learning, memory, and emotions . The cerebrum can also be divided into two cerebral hemispheres , separated by a large division called the longitudinal fissure. This fissure divides the cerebrum into a left and right side. The lobes and hemispheres of the brain communicate with each other and with the rest of the body by white matter nerve tracts . These nerve tracts are myelinated axons that are the information pathways within the CNS. A major white matter tract is the corpus callosum , which connects the left and right cerebral hemispheres....
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