Ch. 4 Motor Control (Quiz)

Question 1

1. Which of the following statements is true about motor neuron innervation of muscle
   fibers?

A. For fine motor control one motor neuron innervates about 2-3 muscle fibers, whereas for large muscles, it innervates about 100 or more.

B. The number of muscle fibers innervates by motor neuron does not vary by the size of
muscle fibers.

C. Each motor neuron innervates just one muscle.

D. None of the above

Answer 1

A. For fine motor control one motor neuron innervates about 2-3 muscle fibers, whereas for large muscles, it innervates about 100 or more.

Question 2

2. Which of the following statements about Tourette’s syndrome is NOT true?

A. It is characterized by stereotypic and involuntary muscle movements, known as tics.

B. Tics can be exacerbated by stress.

C. Tics can affect a variety of muscles and can be vocal as well.

D. Tics typically are first observed in adolescence.

Answer 2

D. Tics typically are first observed in adolescence.

Question 3

3. The ________ pathway projects both contralaterally and ipsilaterally in order to link the brain to muscles of the trunk.

A. lateral corticospinal
B. spinocerebellar
C. medial motor
D. lateral motor

Answer 3

C. medial motor

Question 4

4. Which division of the cerebellum is involved in balance and posture?

A. Vestibulocerebellum.
B. Spinocerebellum.
C. Cerebrocerebellum.
D. Basalcerebellum.

Answer 4

A. Vestibulocerebellum.

Question 5

5. Which of the following is NOT one of the subcortical nuclei of the basal ganglia?

A. Substantia nigra.
B. Cerebellum.
C. Nucleus accumbens.
D. Subthalamic nucleus.

Answer 5

B. Cerebellum.

Question 6

6. Which of the following is NOT a symptom that a person with Parkinson’s disease might
   exhibit?

A. Difficulties in initiating behavior.
B. Stooped posture.
C. Parkinsonian Mask.
D. Echolalia

Answer 6

D. Echolalia

Question 7

7. An abstract representation of intended movement is called ________.

A. the decomposition of movement
B. a neuromuscular junction
C. the forward model
D. a motor plan

Answer 7

D. a motor plan

Question 8

8. Which part of the brain is sometimes referred to as M1?

A. Premotor cortex.
B. Primary motor cortex.
C. Supplementary motor cortex.
D. Supplementary eye field

Answer 8

B. Primary motor cortex.

Question 9

9. Which of the following is NOT true of apraxia?

A. Apraxia affects skilled motor movements.

B. Apraxia usually affects movements that are sequential in nature.

C. Apraxia can also affect conceptual aspects of movement such as gesture.

D. Apraxia manifests contralaterally from the side of the lesion.

Answer 9

D. Apraxia manifests contralaterally from the side of the lesion.

Question 10

10. Which of the following statements regarding the optimal feedback control model of motor control is true?

A. It conceptualizes the motor regions of the brain working together as a circuit to reach a
goal.

B. It suggests that the occipital cortex plays an critical role in using feedback from visual
information to guide movement.

C. It suggests that brain regions must work together as a circuit to achieve a certain motor goal that can only be accomplished by a particular set of muscles .

D. Suggests that an abstract plan of motor sequences is only necessary if a person has
subcortical damage.

Answer 10

A. It conceptualizes the motor regions of the brain working together as a circuit to reach a
goal.