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CHAPTER 10: Cerebral Cortex

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Brodmann's areas were originally defined by the following:

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A. Different cellular types and density in cortical layers

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B. Speed of nerve conduction within the corpus callosum

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C. Presence or absence of sulci and gyri in the outer cortical layers

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D. Topographical variations in the skull that imply underlying brain anatomy

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A. Different cellular types and density in cortical layers

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The following statement best describes the six layers of the cortex:

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A. The deepest granular layers are the main targets for ascending input from the ipsilateral and contralateral cortex.

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B. Layers are numbered from superficial to deep, and contain different cell types that give each layer a different look and function.

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C. Layers are numbered by quantity of stellate cells that project from the thalamus to the neocortex.

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D. Only the deepest layers contain glial cells for repair and maintenance due to high risk of injury in these areas.

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B. Layers are numbered from superficial to deep, and contain different cell types that give each layer a different look and function.

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Ocular dominance, the dominance of one eye over the other, occurs for the following functions:

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A. Tear production and coordination of extraocular muscle function

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B. Light perception and blink reflex

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C. Binocular vision and orientation of objects in space

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D. Input for both sleep and wake cycles

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C. Binocular vision and orientation of objects in space

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Cortical motor control incorporates the following information for selection, planning, and producing motion:

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A. Information from area S1 for complex, distal, bimanual control

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B. Outputs to the dorsal columns for precise muscle contraction

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C. Visual, somatosensory, vestibular, and auditory information

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D. Afferent input from corticospinal and corticobulbar tracts

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C. Visual, somatosensory, vestibular, and auditory information

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The somatosensory homunculus demonstrates:

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A. general mapping of sensory receptors in area S1.

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B. precise location of sensory receptors in area S2.

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