L11-BrainAnatomy

L11-BrainAnatomy - 2/27 Fundamentals of Brain Anatomy Brain...

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2/27 Fundamentals of Brain Anatomy Brain Structure o Gyrus: A convolution of the cortex of the cerebral hemispheres, separated by sulci or fissures o Sulcus: A groove in the surface of the cerebral hemisphere, smaller than a fissure o Fissure: A major groove in the surface of the brain, larger than a sulcus o White matter is myelinated and gray matter is cell bodied (Cerebral cortex) Major sulci of the brain o Central Sulcus: runs right down the midpoint of the brain to the lateral fissure o Sylvian or lateral fissure: horizontal along the alignment of the eyes o Parieto-occipital sulcus: divides parietal and occipital lobes of the brain Lobes of the brain o Parietal lobe: caudal to central sulcus rostrally; rostal to the parieto-occipital sulcus caudally; dorsal to the Sylvian fissure o Occipital lobe: caudal to the same imaginary line of the parieto-occipital sulcus o Frontal lobe: rostral to the central sulcus and above the lateral fissure o Temporal lobe: ventral to Sylvian fissure and rostral to the imaginary line estending from the parieto-occipital sulcus o Anatomical structures also share functional relevance Pre- and Post-central Gyri o Postcentral gyrus (somatosensory cortex) delimited rostrally by the central sulcus and cadually by the postcentral sulcus o Precentral gyrus (motor cortex) delimited rostrally by the precentral sulcus and caudally by the central sulcus
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This note was uploaded on 04/09/2008 for the course PSYC 220 taught by Professor Brunges during the Spring '07 term at UVA.

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L11-BrainAnatomy - 2/27 Fundamentals of Brain Anatomy Brain...

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