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CHAPTER 10: Cerebral Cortex

Brodmann's areas were originally defined by the following:

A. Different cellular types and density in cortical layers

B. Speed of nerve conduction within the corpus callosum

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

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

A. Different cellular types and density in cortical layers

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

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

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

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

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

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

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

A. Tear production and coordination of extraocular muscle function

B. Light perception and blink reflex

C. Binocular vision and orientation of objects in space

D. Input for both sleep and wake cycles

C. Binocular vision and orientation of objects in space

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

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

B. Outputs to the dorsal columns for precise muscle contraction

C. Visual, somatosensory, vestibular, and auditory information

D. Afferent input from corticospinal and corticobulbar tracts

C. Visual, somatosensory, vestibular, and auditory information

The somatosensory homunculus demonstrates:

A. general mapping of sensory receptors in area S1.

B. precise location of sensory receptors in area S2.

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