Chapter 8 Review
PSYCH 335

1. The primary motor cortex is located in the

precentral gyrus
postcentral gyrus
inferior temporal gyrus
superior temporal gyrus

2. Mammalian muscles

can be classified as red, pink, and white, as in fish
contain either fast-twitch or slow-twitch fibers, but not both
contain both fast-twitch and slow-twitch fibers in the same muscles
show only genetic, and not any environmental, determination of the ratio of fast-twitch to slow-twitch fibers

3. The basal ganglia and the cerebellum do not play a major role in

sensorimotor coordination
relaying signals from higher to lower levels of the sensorimotor system
voluntary movement
integrating cortical and subcortical activity

4. The triceps muscle is

synergistic
antagonistic
an extensor
a flexor

5. Golgi tendon organ is to muscle spindle as

muscle length is to muscle tension
muscle tension is to muscle length
parallel is to series
both b and c

6. The ventromedial tract of the spinal cord

contains crossed fibers from the primary motor cortex and adjacent areas and from the red nucleus of the midbrain
controls movement near the midline of the body that are necessarily bilateral
controls movements on the side of the body opposite the brain area where the fibers originate
works independently from the dorsolateral tract

7. The dorsolateral tract of the spinal cord

originates mostly in the primary motor cortex and adjacent areas and in the red nucleus of the midbrain
controls movements in the periphery of the body
controls movement son the side of the body opposite the brain area where the fibers originate
all of the above

8. The pyramids of the medulla

contain the cell bodies of the dorsolateral tract
contain the cell bodies fo the ventromedial tract
are the site where axons of the dorsolateral tract cross from one side to the other
are the site where the axons of the ventromedial tract cross from one side to the other

9. The Golgi tendon organ

is also located in the muscle spindle
affects the motor neuron in the same way as the muscle spindle, thereby enhancing its effect
responds when the muscle contracts
excites the motor neuron that innervates the muscle

10. Parkinson’s disease has been traced to

loss of cholinergic neurons within the frontal cortex
overproduction of dopamine within the basal ganglia
degeneration of dopamine neurons within the nigrostriatal bundle
overproduction of GABA within the caudate nucleus

Name:

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