Question 1

Following an injury to his arm,a patient complains that he has no sensations from the thumb,index finger,middle finger,and part of the ring finger.What nerve do you suspect to be damaged

Accepted Answer

A)  Median nerve
B)  Radial nerve
C)  Musculocutaneous nerve
D)  Ulnar nerve
E)  Axillary nerveF) All of the above
G) A) and C)

Question 2

This structure contains unmyelinated axons and serves as a communication route between the right and left sides of the gray matter in the spinal cord.

Accepted Answer

A)  Gray commissure
B)  White commissure
C)  Lateral commissure
D)  Posterior commissure
E)  Denticulate ligamentsF) C) and D)
G) B) and C)

Question 3

Following an injury to his arm,a patient complains that he has no sensations from his "pinky." You suspect that he has damaged the

Accepted Answer

A)  median nerve.
B)  radial nerve.
C)  musculocutaneous nerve.
D)  ulnar nerve.
E)  axillary nerve.F) A) and E)
G) A) and D)

Question 4

Which statement accurately describes spinal nerves

Accepted Answer

A)  Most spinal nerves are motor nerves.
B)  Each spinal nerve is mixed in that it contains some sensory axons and some motor axons.
C)  All spinal nerves are sensory nerves.
D)  Odd-numbered spinal nerves are sensory and even-numbered spinal nerves are motor.
E)  Spinal nerves are central axons contained within the vertebral canal.F) None of the above
G) D) and E)

Question 5

-This figure shows neuron pathways and nuclei locations.What type of nuclei does number 2 indicate

Accepted Answer

A)  Somatic motor nuclei
B)  Autonomic motor nuclei
C)  Visceral sensory nuclei
D)  Somatic sensory nuclei
E)  None of the choices is correct.F) C) and E)
G) B) and E)

Question 6

The plexus that supplies the upper limbs is the _________ plexus.

Accepted Answer

A)  cervical
B)  brachial
C)  bronchiole
D)  lumbar
E)  sciaticF) C) and E)
G) C) and D)

Question 7

This figure shows a cross section of a vertebra and the spinal cord.What structure does number 1 indicate

Accepted Answer

A)  Epidural space
B)  Pia mater
C)  Subarachnoid space
D)  Central canal
E)  Dura materF) A) and B)
G) C) and D)

Question 8

-This figure shows a cross section of the spinal cord.What structure does number 1 indicate

Accepted Answer

A)  Lateral horn
B)  Anterior horn
C)  Gray commissure
D)  Posterior horn
E)  Posterior funiculusF) C) and D)
G) B) and E)

Question 9

The embryonic feature that gives rise to the anterior and lateral horns of gray matter is the _____ plate.

Accepted Answer

A)  basal
B)  alar
C)  ulnar
D)  anterior
E)  posteriorF) B) and D)
G) C) and E)

Question 10

The lateral corticospinal tracts include a ________ of the upper motor neuron axons that pass through the medulla,and they govern control of ___________.

Accepted Answer

A)  majority,axial muscles
B)  majority,muscles used for finely controlled movements
C)  minority,axial muscles
D)  minority,muscles used for finely controlled movementsE) A) and D)
F) C) and D)

Question 11

An individual tract within the spinal cord contains either sensory nerve signals or motor nerve signals only.

Accepted Answer

A) True 
 B)False

Question 12

The direct motor pathway originates in the

Accepted Answer

A)  motor cortex of the cerebral cortex.
B)  superior colliculus of the midbrain.
C)  vestibular nuclei of the brainstem.
D)  reticular formation of the brainstem.E) B) and C)
F) None of the above

Question 13

-This figure shows spinal nerve branches.What structures are indicated by number 4

Accepted Answer

A)  Anterior rami
B)  Posterior rami
C)  Rami communicantes
D)  Sympathetic trunk ganglia
E)  Posterior root gangliaF) C) and E)
G) B) and D)

Question 14

The neurons that directly innervate skeletal muscles are called

Accepted Answer

A)  first-order neurons.
B)  second-order neurons.
C)  upper motor neurons.
D)  lower motor neurons.E) C) and D)
F) None of the above

Question 15

The fasciculus cuneatus is part of the

Accepted Answer

A)  anterolateral pathway.
B)  spinocerebellar pathway.
C)  posterior funiculus--medial lemniscal pathway.
D)  lateral spinothalamic tract.
E)  fasciculus gracilis.F) C) and D)
G) A) and E)

Question 16

Where the sciatic nerve splits,it branches directly to the

Accepted Answer

A)  deep and superficial fibular nerves.
B)  tibial and common fibular nerves.
C)  femoral and obturator nerves.
D)  deep femoral and tibial nerves.
E)  popliteal and sural nerves.F) A) and E)
G) None of the above

Question 17

Late one night you are leaving the science building during a snowstorm.As you approach your car,your right foot suddenly slips on a patch of ice.Your left leg immediately stiffens as you try to regain your balance.The reflex action you relied upon is a(n)

Accepted Answer

A)  unilateral reflex.
B)  ipsilateral reflex.
C)  contralateral reflex.
D)  voluntary reflex.
E)  None of the choices is correct.F) A) and B)
G) A) and C)

Question 18

Each side of the spinal cord gives rise to _____ cervical nerves.

Accepted Answer

A)  two
B)  six
C)  seven
D)  eight
E)  twelveF) A) and D)
G) A) and C)

Question 19

Motor pathways are also called ascending pathways.

Accepted Answer

A) True 
 B)False

Question 20

The cervical plexus is formed by the

Accepted Answer

A)  posterior rami of spinal nerves C2-C6.
B)  posterior rami of spinal nerves C4-C8.
C)  anterior rami of spinal nerves C1-C4.
D)  anterior rami of spinal nerves C3-C7.
E)  rami communicantes of spinal nerves C1-C7.F) B) and D)
G) None of the above

Exam 14: Nervous System: Spinal Cord and Spinal Nerves

The plexus that supplies the upper limbs is the _________ plexus.

Correct AnswerverifiedShow Answer

This figure shows a cross section of a vertebra and the spinal cord.What structure does number 1 indicate

Correct AnswerverifiedShow Answer

The embryonic feature that gives rise to the anterior and lateral horns of gray matter is the _____ plate.

Correct AnswerverifiedShow Answer

Where the sciatic nerve splits,it branches directly to the

Correct AnswerverifiedShow Answer

-This figure shows neuron pathways and nuclei locations.What type of nuclei does number 2 indicate

Correct AnswerverifiedShow Answer

Late one night you are leaving the science building during a snowstorm.As you approach your car,your right foot suddenly slips on a patch of ice.Your left leg immediately stiffens as you try to regain your balance.The reflex action you relied upon is a(n)

Correct AnswerverifiedShow Answer

This structure contains unmyelinated axons and serves as a communication route between the right and left sides of the gray matter in the spinal cord.

Correct AnswerverifiedShow Answer

Motor pathways are also called ascending pathways.

Correct AnswerverifiedShow Answer

An individual tract within the spinal cord contains either sensory nerve signals or motor nerve signals only.

Correct AnswerverifiedShow Answer

Following an injury to his arm,a patient complains that he has no sensations from his "pinky." You suspect that he has damaged the

Correct AnswerverifiedShow Answer

-This figure shows spinal nerve branches.What structures are indicated by number 4

Correct AnswerverifiedShow Answer

Which statement accurately describes spinal nerves

Correct AnswerverifiedShow Answer

The fasciculus cuneatus is part of the

Correct AnswerverifiedShow Answer

Following an injury to his arm,a patient complains that he has no sensations from the thumb,index finger,middle finger,and part of the ring finger.What nerve do you suspect to be damaged

Correct AnswerverifiedShow Answer

Each side of the spinal cord gives rise to _____ cervical nerves.

Correct AnswerverifiedShow Answer

The lateral corticospinal tracts include a ________ of the upper motor neuron axons that pass through the medulla,and they govern control of ___________.

Correct AnswerverifiedShow Answer

The neurons that directly innervate skeletal muscles are called

Correct AnswerverifiedShow Answer

The cervical plexus is formed by the

Correct AnswerverifiedShow Answer

-This figure shows a cross section of the spinal cord.What structure does number 1 indicate

Correct AnswerverifiedShow Answer

The direct motor pathway originates in the

Correct AnswerverifiedShow Answer

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The lateral corticospinal tracts include a of the upper motor neuron axons that pass through the medulla,and they govern control of ___.

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