Chapter 12 CNS part 2

Chapter 12 CNS part - Chapter 12 Central Nervous System Part 2 Angela Peterson-Ford PhD [email protected] Functional Areas of the Cerebral

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Chapter 12 Central Nervous System Part 2 Angela Peterson-Ford, PhD [email protected]
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Functional Areas of the Cerebral Cortex Figure 12.8a
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Functional Areas of the Cerebral Cortex Figure 12.8b
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Language Areas Located in a large area surrounding the left (or language-dominant) lateral sulcus Major parts and functions: Wernicke’s area – involved in sounding out unfamiliar words Broca’s area – speech preparation and production Lateral prefrontal cortex – language comprehension and word analysis Lateral and ventral temporal lobe – coordinate auditory and visual aspects of language
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General (Common) Interpretation Area Ill-defined region including parts of the temporal, parietal, and occipital lobes Found in one hemisphere, usually the left Integrates incoming signals into a single thought Involved in processing spatial relationships
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Visceral Association Area Located in the cortex of the insula Involved in conscious perception of visceral sensations
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Lateralization A longitudinal fissure separates the human brain into two distinct cerebral hemispheres, connected by the corpus callosum. The sides resemble each other and each hemisphere's structure is generally mirrored by the other side. Yet despite the strong similarities, the functions of each cortical hemisphere are different this is called lateralization .
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Lateralization of Cortical Function Lateralization – each hemisphere has abilities not shared with its partner Cerebral dominance – designates the hemisphere dominant for language Left hemisphere – controls language, math, and logic Right hemisphere – controls visual-spatial skills, emotion, and artistic skills
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Cerebral White Matter Consists of deep myelinated fibers and their tracts It is responsible for communication between: The cerebral cortex and lower CNS center, and areas of the cerebrum
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Cerebral White Matter Types include: Commissures – connect corresponding gray areas of the two hemispheres Association fibers – connect different parts of the same hemisphere Projection fibers – enter the hemispheres from lower brain or cord centers
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Fiber Tracts in White Matter Figure 12.10a
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Fiber Tracts in White Matter Figure 12.10b
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Basal Nuclei Masses of gray matter found deep within the cortical white matter The corpus striatum is composed of three parts Caudate nucleus Lentiform nucleus – composed of the putamen and the globus pallidus Fibers of internal capsule running between and through caudate and lentiform nuclei
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Basal Nuclei Figure 12.11a
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Basal Nuclei Figure 12.11b
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Functions of Basal Nuclei Though somewhat elusive, the following are thought to be functions of basal nuclei
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This note was uploaded on 01/06/2012 for the course BIOL 2401 taught by Professor Elainefanin during the Spring '11 term at Collins.

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Chapter 12 CNS part - Chapter 12 Central Nervous System Part 2 Angela Peterson-Ford PhD [email protected] Functional Areas of the Cerebral

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