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

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