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.   thighs.
B.   proximal limbs.
C.   body core.
D.   legs.
E.   hands and feet.
Question #2
In neuroanatomy, “rubro” refers to the
A.   vestibular system.
B.   cerebellum.
C.   red nucleus.
D.   caudate.
E.   substantia nigra.
Question #3
Most axons of the dorsolateral corticorubrospinal tract synapse on
A.   Betz cells.
B.   motor neurons that project to the fingers.
C.   muscles of the fingers and thumb.
D.   interneurons of the spinal gray matter that in turn synapse on motor neurons that project to the distal muscles of the arms and legs.
E.   muscles of the hands and wrists.
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.   tectum.
B.   reticular formation.
C.   all of these
D.   vestibular nuclei.
Question #5
Which midbrain structure receives visual and auditory information about spatial location?
A.   basal ganglia
B.   cerebellum
C.   vestibular nucleus
D.   tegmentum
E.   tectum
Question #6
In one classic experiment, monkeys had difficulty letting go of food after their
A.   basal ganglia were lesioned.
B.   ventromedial corticospinal tracts were transected.
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 extensors.
B.   fewest motor neurons.
C.   most muscle fibers.
D.   fewest muscle fibers.
E.   most motor neurons.
Question #8
All of the motor neurons that innervate the fibers of a single muscle are called its
A.   agonists.
B.   motor pool.
C.   discharge unit.
D.   antagonists.
E.   motor unit.
Question #9
The biceps and triceps are
A.   antagonistic.
B.   extensors.
C.   dynamic
D.   synergistic.
E.   isometric.
Question #10
Muscles are protected from damage caused by excessive contraction by
A.   extrafusal motor pools.
B.   gamma efferents.
C.   Golgi tendon organs.
D.   spindle afferents.
E.   synergistic muscles.
Question #11
Muscle spindles provide the CNS with information about muscle
A.   length.
B.   fatigue.
C.   tension.
D.   color.
E.   location.
Question #12
Intrafusal is to extrafusal as
A.   dynamic is to static.
B.   muscle spindle is to skeletal muscle.
C.   CNS is to PNS.
D.   voluntary is to reflex.
E.   voluntary is to ballistic.
Question #13
Recurrent collateral inhibition is mediated by
A.   cocontraction.
B.   reciprocal innervation.
C.   Golgi organs.
D.   Renshaw cells.
E.   muscle spindles.
Question #14
One fMRI study indicated that the central sensorimotor programs for signing one’s name are stored in
A.   secondary motor cortex.
B.   descending motor pathways.
C.   spinal interneuronal pools.
D.   association cortex.
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.   Posterior parietal cortex was more activated during the performance of both newly learned sequences than during the performance of 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.   Contralateral primary motor and somatosensory cortices were equally activated during the performance of newly learned and well-practiced sequences.

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