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Corpus_Callosum |
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http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Corpus_Callosum |
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Corpus_Callosum |
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Trancred 2005 The Corpus Callosum, the largest of the cerebral commissures, allows information to be transmitted from one cerebral hemisphere to the other, enabling memory traces to be stored bilaterally. Structures: Cerebral Commissures Cerebral Hemisphere Corpus Callosum - Body Corpus Callosum - Genu Corpus Callosum - Splenium Forceps Major Forceps Minor Primary Somatosensory Area Information: The Corpus Callosum is the largest of the cerebral commissures. It contains approximately 300 million fibres, connecting the cortex of the two cerebral hemispheres. It consists of 4 parts - the splenium (posterior), body, genu (anterior) and rostrum (continous antero-inferiorly with the genu). Fibres from the genu radiate anteriorly into the anterior region of the frontal lobes are known as the forceps minor. Fibres of the splenium, which radiate posteriorly into the occipital lobes are known as the forceps major. The function of the corpus callosum is to allow for the transfer of information from one hemisphere to another and to enable memory traces to be stored bilaterally. In cases of severe epilepsy the corpus callosum is sometimes severed to limit the extent of seizures, and subsequent behavioural studies in these patients have allowed us to gain some insight into the role of the corpus callosum. While there are no obvious personality, intellectual or motor changes in these 'split-brain' patients, there are some subtle changes particularly in regard to learning. For example, a task learned with one hand cannot then be performed efficiently with the other hand because the memory trace cannot be transferred to the opposite hemisphere. Similarly, an object held in the left hand (but not seen) cannot be described verbally because the somatosensory information cannot be transferred from the primary somatosensory area of the right hemisphere across to the left hemisphere (where the language areas are usually located) |
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http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Brain_Structure |