Chapter 12

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The Central Nervous System
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1

What is the most prominent example of commisural fibers—tracts that connect the left and right hemispheres.

Corpus Callosum

2

Which of the following are motor areas of the cerebral cortex that lie in the posterior part of the frontal lobes and control voluntary movement?

1. primary somatosensory cortex; somatosensory association cortex; visual areas
2. primary motor cortex; premotor cortex; Broca's area; frontal eye field
3. primary motor cortex; premotor cortex; prefrontal cortex; gustatory cortex
4. Broca's area; posterior association area; auditory areas; visual areas

2. primary motor cortex; premotor cortex; Broca's area; frontal eye field

3

Patients who have lesions involving Broca's area __________

can understand language, but have difficulty speaking

4

__________ is a progressive degenerative disease of the brain in which beta-amyloid peptide deposits and neurofibrillary tangles appear and that ultimately results in dementia (mental deterioration).

Alzheimer's disease

5

Specialized _______________ participate in the filtration, absorption, and secretory processes that create cerebrospinal fluid.

ependymal cells

6

Which protective covering of the brain provides passageways for cerebrospinal fluid (CSF) to drain into the superior sagittal sinus?

arachnoid mater

7

Which of the following regions of the brain provides the precise timing and appropriate patterns of skeletal muscle contraction for the smooth, coordinated movements and agility that are needed for our daily living?

cerebellum

8

Which of the following is NOT a feature of the major spinal cord tracts (pathways)?
memory
decussation
relay
somatotopy

memory

9

What part of the spinal cord represents the collection of nerve roots at the inferior end of the vertebral canal?

cauda equina

10

Which of the following hypothalamic control centers would you predict is the LEAST important for survival?
suprachiasmatic nucleus
autonomic control center
temperature control center
thirst center

suprachiasmatic nucleus

11

Which of the following is a characteristic of a coma but is NOT a characteristic of sleep?
1. absence of brain waves ("flat EEG")
2. irreversible brain damage
3. continuously reduced mitochondrial activity in brain neurons
4. All of the listed responses are correct.

3. continuously reduced mitochondrial activity in brain neurons