Chapt14 part2

Chapt14 part2 - 14-9 The CerebrumThe CerebrumIs the largest...

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Unformatted text preview: 14-9 The CerebrumThe CerebrumIs the largest part of the brainControls all conscious thoughts and intellectual functionsProcesses somatic sensory and motor information14-9 The CerebrumGray MatterIn cerebral cortexand basal nucleiWhite MatterDeep to basal cortexAround basal nuclei14-9 The CerebrumStructures of the CerebrumGyri of neural cortexIncrease surface area (number of cortical neurons)Insula (island of cortex)Lies medial to lateral sulcusLongitudinal fissureSeparates cerebral hemispheresLobesDivisions of hemispheres14-9 The CerebrumStructures of the CerebrumCentral sulcus divides:Anterior frontal lobe from posterior parietal lobeLateral sulcus divides:Frontal lobe from temporal lobeParieto-occipital sulcus divides:Parietal lobe from occipital lobeFigure 14-12a The Brain in Lateral Viewateral sulcusPonsMedulla oblongataFRONTALLOBECentral sulcusTEMPORAL LOBELateral view, cadaver brainCerebellumOCCIPITALLOBEPARIETAL LOBEFigure 14-12b The Brain in Lateral ViewFRONTALLOBEPrecentralgyrusCentralsulcusPostcentralgyrusLateral sulcusPonsPARIETAL LOBEOCCIPITALLOBETEMPORALLOBECerebellumMedulla oblongataLateral viewFigure 14-12c The Brain in Lateral ViewInsulaRetractors along the lateralsulcus showing the insulaFigure 14-12d The Brain in Lateral ViewCentral sulcusPostcentral gyrusPARIETAL LOBEOCCIPITAL LOBEParieto-occipital sulcusCerebellumPonsMedulla oblongataMidsagittal sectionTEMPORAL LOBEFRONTALLOBEPrecentral gyrusCingulategyrus14-9 The CerebrumThree Functional Principles of the Cerebrum1. Each cerebral hemisphere receives sensory information from, and sends motor commands to, the opposite side of the body2. The two hemispheres have different functions, although their structures are alike3. Correspondence between a specific function 14-9 The CerebrumWhite Matter of the CerebrumAssociation fibersConnections within one hemisphereCommissural fibersBands of fibers connecting two hemispheresProjection fibersConnect cerebrum with lower areas14-9 The CerebrumAssociation FibersArcuate fibers Are short fibersConnect one gyrus to anotherLongitudinal fasciculi Are longer bundlesConnect frontal lobe to other lobes in same hemisphere14-9 The CerebrumCommissural FibersCorpus callosum Anterior commissure14-9 The CerebrumProjection Fibers Pass through diencephalonLink cerebral cortex with:Diencephalon, brain stem, cerebellum, and spinal cordInternal capsuleAll ascending and descending projection fibersFigure 14-13a Fibers of the White Matter of the CerebrumArcuate fibersLongitudinalfasciculiLateral viewFigure 14-13b Fibers of the White Matter of the CerebrumLongitudinalfissureCorpuscallosumProjectionfibers ofinternalcapsuleAnteriorcommissureAnterior view14-9 The CerebrumThe Basal NucleiAre masses of gray matterAre embedded in white matter of cerebrumDirect subconscious activities 14-9 The CerebrumAnatomy of Basal NucleiCaudate nucleusCurving, slender tailLentiform nucleusGlobus pallidus PutamenFigure 14-14a...
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Chapt14 part2 - 14-9 The CerebrumThe CerebrumIs the largest...

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