Psychology 103 - Physiological Psychology » Spring 2022 » Chapter 8 Quiz 2

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Question #1
In general, the dorsolateral corticospinal tract controls the muscles of the
A.   proximal limbs.
B.   hands and feet.
C.   thighs.
D.   body core.
E.   legs.
Question #2
In neuroanatomy, “rubro” refers to the
A.   red nucleus.
B.   vestibular system.
C.   caudate.
D.   cerebellum.
E.   substantia nigra.
Question #3
Most axons of the dorsolateral corticorubrospinal tract synapse on
A.   muscles of the hands and wrists.
B.   Betz cells.
C.   interneurons of the spinal gray matter that in turn synapse on motor neurons that project to the distal muscles of the arms and legs.
D.   muscles of the fingers and thumb.
E.   motor neurons that project to the fingers.
Question #4
In contrast to the ventromedial corticospinal tract, before descending to the spinal cord, the ventromedial cortico-brainstem-spinal tract interacts with the
A.   vestibular nuclei.
B.   tectum.
C.   reticular formation.
D.   all of these
Question #5
Which midbrain structure receives visual and auditory information about spatial location?
A.   vestibular nucleus
B.   tegmentum
C.   basal ganglia
D.   cerebellum
E.   tectum
Question #6
In one classic experiment, monkeys had difficulty letting go of food after their
A.   ventromedial corticospinal tracts were transected.
B.   basal ganglia were lesioned.
C.   cerebellum was lesioned.
D.   dorsolateral corticorubrospinal tracts were transected.
E.   dorsolateral corticospinal tracts were transected.
Question #7
The motor units of the thumb, fingers, and face contain the
A.   most motor neurons.
B.   most extensors.
C.   most muscle fibers.
D.   fewest motor neurons.
E.   fewest muscle fibers.
Question #8
All of the motor neurons that innervate the fibers of a single muscle are called its
A.   agonists.
B.   antagonists.
C.   motor pool.
D.   discharge unit.
E.   motor unit.
Question #9
The biceps and triceps are
A.   isometric.
B.   synergistic.
C.   antagonistic.
D.   dynamic
E.   extensors.
Question #10
Muscles are protected from damage caused by excessive contraction by
A.   extrafusal motor pools.
B.   Golgi tendon organs.
C.   spindle afferents.
D.   synergistic muscles.
E.   gamma efferents.
Question #11
Muscle spindles provide the CNS with information about muscle
A.   fatigue.
B.   length.
C.   location.
D.   color.
E.   tension.
Question #12
Intrafusal is to extrafusal as
A.   voluntary is to ballistic.
B.   voluntary is to reflex.
C.   dynamic is to static.
D.   muscle spindle is to skeletal muscle.
E.   CNS is to PNS.
Question #13
Recurrent collateral inhibition is mediated by
A.   cocontraction.
B.   reciprocal innervation.
C.   Renshaw cells.
D.   muscle spindles.
E.   Golgi organs.
Question #14
One fMRI study indicated that the central sensorimotor programs for signing one’s name are stored in
A.   spinal interneuronal pools.
B.   descending motor pathways.
C.   primary motor cortex.
D.   secondary motor cortex.
E.   association cortex.
Question #15
Which of the following is a major finding of the Jenkins and colleagues PET study of motor learning?
A.   all of these
B.   Dorsolateral prefrontal cortex was activated during the performance of newly learned but not well-practiced sequences
C.   Contralateral primary motor and somatosensory cortices were equally activated during the performance of newly learned and well-practiced sequences.
D.   The cerebellum was activated during both newly learned and well-practiced sequences but more during newly learned sequences.
E.   Posterior parietal cortex was more activated during the performance of both newly learned sequences than during the performance of well-practiced sequences.

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