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

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