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.   body core.
C.   hands and feet.
D.   legs.
E.   thighs.
Question #2
In neuroanatomy, “rubro” refers to the
A.   caudate.
B.   substantia nigra.
C.   vestibular system.
D.   red nucleus.
E.   cerebellum.
Question #3
Most axons of the dorsolateral corticorubrospinal tract synapse on
A.   interneurons of the spinal gray matter that in turn synapse on motor neurons that project to the distal muscles of the arms and legs.
B.   Betz cells.
C.   motor neurons that project to the fingers.
D.   muscles of the hands and wrists.
E.   muscles of the fingers and thumb.
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.   all of these
C.   reticular formation.
D.   tectum.
Question #5
Which midbrain structure receives visual and auditory information about spatial location?
A.   tectum
B.   basal ganglia
C.   tegmentum
D.   cerebellum
E.   vestibular nucleus
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.   fewest motor neurons.
B.   most muscle fibers.
C.   fewest muscle fibers.
D.   most extensors.
E.   most 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.   isometric.
B.   extensors.
C.   antagonistic.
D.   dynamic
E.   synergistic.
Question #10
Muscles are protected from damage caused by excessive contraction by
A.   Golgi tendon organs.
B.   synergistic muscles.
C.   gamma efferents.
D.   extrafusal motor pools.
E.   spindle afferents.
Question #11
Muscle spindles provide the CNS with information about muscle
A.   fatigue.
B.   tension.
C.   location.
D.   color.
E.   length.
Question #12
Intrafusal is to extrafusal as
A.   voluntary is to reflex.
B.   dynamic is to static.
C.   voluntary is to ballistic.
D.   muscle spindle is to skeletal muscle.
E.   CNS is to PNS.
Question #13
Recurrent collateral inhibition is mediated by
A.   reciprocal innervation.
B.   Renshaw cells.
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.   association cortex.
B.   secondary motor cortex.
C.   descending motor pathways.
D.   spinal interneuronal pools.
E.   primary motor 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.   Contralateral primary motor and somatosensory cortices were equally activated during the performance of newly learned and well-practiced sequences.
C.   The cerebellum was activated during both newly learned and well-practiced sequences but more during newly learned sequences.
D.   Dorsolateral prefrontal cortex was activated during the performance of newly learned but not well-practiced 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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