QUESTION 1 How many skeletal muscles do we have? 640 480 512 392 Q UESTION 2 Whi

Question

QUESTION 1 How many skeletal muscles do we have? 640 480 512 392

QUESTION 2 Which of the following would demonstrate the finding that some aspects of motor learning are independent of the specific effectors used to perform an action?

a. All cyclists tend to use the same set of effectors in riding, regardless of the specific age at which they learned to ride a bicycle.

b. Actions such as the backhand stroke in tennis require the coordination of a sequence of separate movements.

c. Right-handed pitchers have great difficulty in throwing a baseball accurately with the left hand.

d. One’s signature looks very similar regardless of whether one uses the left or the right hand to produce it.

QUESTION 3 Franz and colleagues (1996) asked a patient who had had his corpus callosum surgically severed to draw figures like the ones here, each simultaneously with a different hand. mc013-1.jpg Compared to neurologically intact control participants, they found that this patient

a. performed poorly and was especially impaired when the figures closely resembled each other.

b. was better at producing movements simultaneously with both hands only when they differed in direction.

c. was selectively impaired when simultaneously producing movements with each hand when they differed in direction.

d. was better at producing movements simultaneously with both hands, even when they differed in direction.

QUESTION 4 Corticospinal fibers originate primarily in the

a. primary motor cortex.

b. supplementary motor area.

c. cerebellum.

d. premotor cortex.

QUESTION 5

This tract controls voluntary movements of big muscles.

Lateral corticospinal tract

Anterior corticospinal tract

Rubrospinal tract

Tectospinal Tract

QUESTION 6

Loss of blood flow in the _______ is the most common cause of hemiplegia.

vertebral artery

middle cerebral artery

anterior cerebral artery

circle of Willis

A ____________________ consists of fibers innervated by a single alpha neuron.

Motor Unit

Extrafusal collection

Muscle

Ganglia

QUESTION 8

Lesions to the pyramidal motor tract would produce difficulty in moving effectors on which side of the body?

both the contralateral and ipsilateral sides

neither side: the pyramidal neurons do not innervate effector muscles

the ipsilateral side

d. the contralateral side

When a voluntary movement such as contracting one’s right biceps is generated, what other signals, if any, must accompany this command?

No other signal is necessary.

A signal to antagonist muscles, such as the right triceps, to relax.

A signal to antagonist muscles, such as the left biceps, to relax.

A signal to antagonist muscles, such as the right triceps, to flex simultaneously.

The concept of endpoint control refers to the observation that voluntary muscle events

require sensory feedback that arrives after an effector has been moved to its desired location.

are programmed to result in the displacement of an effector based on its desired final location.

are programmed to result in the displacement of an effector based on the desired distance from its starting point.

D. require sensory feedback from an effector that arrives during the entire course of its movement.

This tract controls distal muscles.

Lateral corticospinal tract

Anterior corticospinal tract

Rubrospinal Tract

Tectospinal Trac

QUESTION 12

Hyperkinesia is to _______ as hypokinesia is to _______.

Huntington’s disease ; Parkinson’s disease

Parkinson’s disease ; Huntington’s disease

apraxia ; hemiballism

D. hemiballism ; apraxia

Which of the following is NOT a part of the basal ganglia?

the putamen

the claustrum

the caudate

the globus pallidus

Lateral corticospinal tract

Anterior corticospinal tract

Rubrospinal tract

Tectospinal Tract

Explanation / Answer

1) 640 skeletal muscles

2) C

3)C

4)C

Anterior corticospinal tract

5)Anterior cerebral artery

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