IV. Mcqs Neuro

7/28/2019 IV. Mcqs Neuro

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IV. Spinal Cord: Answer the following by the most appropriate statement:

1. There are _____ pairs of spinal nerves.

a. 12 b. 21 c. 31 d.43

2. The deep groove on the ventral surface that extends the length of the spinal cord is the..

a. anterior median fissure

b. central canalc. central sulcus

d. longitudinal fissure

3. Which spinal nerves comprise the cauda equina?.........

a. coccygeal

b. lumbar, sacral and coccygealc. sacral

d. sacral and coccygeal

4. What two grooves extend the length of the spinal cord and partially divide it into right and left halves?

a. anterior median fissure and central sulcus

b. anterior median fissure and posterior median sulcus

c. central sulcus and longitudinal fissured. longitudinal fissure and posterior median sulcus

5. The fibrous strand or terminal filum that anchors the inferior end of the spinal cord to the coccyx

is a continuation of the

a. arachnoid mater

b. dura mater

c. epidural mater

d. pia mater

6. Space superficial to the meninges in the spinal cord area in which an anesthetic is injected to block

pain impulses from the pelvic area

a. dural sinus

b. epidural spacec. subarachnoid space

d. subdural space

7. Which of the following is NOT one of the four regions into which the spinal cord is divided?

a. coccygeal

b. lumbar

c. sacral

d. thoracic

8. The spinal cord is contiguous superiorally with the

a. cerebellum.b. medulla oblongata

c. midbrain.d. pons.

9. The nerves that supply the upper limbs enter or exit from this area of the spinal cord.

a. cervical plexuses

b. cervical enlargement

c. lumbar enlargement

d. sacral plexuses

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10. The nerves that supply the lower limbs enter or exit from this area of the spinal cord.

a. brachial plexuses

b. cervical enlargement

c. cervical plexuses

d. lumbar enlargement

11. Which of the following statements about the spinal cord is NOT correct?a. It has two enlargements

b. It extends to the level of lumbar vertebra three in an adult

c. It gives rise to 31 pairs of spinal nerves

d. It has a central canal that is continuous with the fourth ventricle of the brain.

12. The inferior end of the spinal cord is anchored to the coccyx by the

a. cauda equine

b. conus medullaris

c. filum terminale

d. tectum

13. The white matter in each half of the spinal cord is organized into three columns. Which of thefollowing is NOT one of the columns?

a. ventral column

b. lateral column

c. inferior columnd. dorsal column

14. The gray matter on either side of the spinal cord is subdivided into anterior, lateral and posterior

a. columns.

b. horns

c. funiculi

d, fascicule

15. The lateral horns of the gray matter in the thoracic region of the spinal cord contain the cell

bodies of

a. somatic motor neurons

b. parasympathetic motor neurons

c. sympathetic motor neurons

d. sensory neurons

16. The gray matter on the right and left sides of the spinal cord is connected by the

a. corpus callosum

b. gray commissurec. intermediate mass

d. vermis

17. Which of the following terms is synonymous with columns as in columns of white

matter in the spinal cord?

a. fascicule

b. funiculi

c. horns

d. tracts

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18. Each column in the white matter of the spinal cord consists of one or more

a. funiculi

b. gyri

c. horns.d. tracts

19. The white matter in each half of the spinal cord is arranged in

a. two horns - anterior and lateral

b. three horns - anterior, lateral and posterior

c. two columns - ventral and dorsal

d. three columns - ventral, lateral and dorsal

20. All of the following are true about spinal nerves EXCEPT

a. they are all mixed

b. there are 31 pairs

c. spinal nerves may contain nerve fibers of both the somatic and autonomic nervous

systems.

d. all motor nerve fibers in spinal nerves extend uninterrupted from the spinal cord toan effector

21. Ascending and descending tracts of the spinal cord occur in the

a. columns.b. gray commissure.

c. horns.

d. root

22. The knee-jerk reflex involves which of the following?

a. sensory and motor neurons

b. sensory, association and motor neurons

c. sensory, motor and interneuronsd. sensory and association neurons

23. Which of the following is NOT true about the knee jerk reflex?

a. It is a spinal reflex

b. It is a somatic reflex.

c. It helps to maintain an upright posture.d. It involves conduction of nerve impulses from sensory neuron to interneuron to

motor neuron

24. Which of the following reflexes inhibits skeletal muscle contraction?a. crossed extensor reflex

b. Golgi tendon reflexc. stretch reflex

d. withdrawal reflex

25. John injured the quadriceps muscles in his legs due to increased tension and tearing while

horsing around on the football field. What reflex failed to protect the muscles?

a. Golgi tendon reflex

b. flexor reflex

c. knee jerk reflex

d. stretch reflex

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26. Inhibitory interneurons are involved in which of the following spinal reflexes?


b. knee jerk reflex

c. stretch reflexd. withdrawal reflex

27. Excitatory interneurons are involved in which of the following spinal reflexes?


b. knee jerk reflex

c. stretch reflex

d. withdrawal reflex

28. You are walking bare foot and step on a tack with your right foot. All of the following will

occur EXCEPT

a. flexor muscles in your right thigh and leg contract to remove your foot

b. reciprocal innervation inhibits extensor muscles in the same limb

c. collaterals of sensory neurons stimulate alpha motor neurons that cause extension in the

opposite limbd. collaterals of interneurons stimulate a crossed extensor reflex

29. The reflex arc contains a

a. sensory receptionb. sensory neuron

c. motor neuron

d. All of the above.

30. Which of the following combinations indicates the correct distribution of spinal nerve pairs?

a. 7 cervical - 12 thoracic - 6 lumbar - 5 sacral 1 coccygeal

b. 7 cervical - 12 thoracic - 5 lumbar - 6 sacral - 1 coccygeal

c. 8 cervical - 12 thoracic - 6 lumbar - 4 sacral - 1 coccygeald. 8 cervical - 12 thoracic - 5 lumbar - 5 sacral - 1 coccygeal

31. A man was in an accident and severed his spinal cord between C6 and C7. Which of the

following would NOT occur?

a. loss of sensation in the trunk below the shoulders, the lowers limbs and portions of the arms

b. damage to the phrenic nerves which would therefore affect breathingc. loss of movement in the lower limbs

d. damage to the intercostal nerves which would affect breathing because the intercostal

muscles would be paralyzed

32. The anterior branch or ramus of a spinal nerve suppliesa. muscles and skin of the back

b. muscles and skin on the front and sides of the trunk and limbsc. the meninges and blood vessels of the spinal cord

d. intervertebral ligaments and vertebrae

33. Where are fibers of adjacent spinal nerves sorted and recombined so that fibers specific to a

body part reach that body part in the same nerve?

a. ganglion

b. nucleus

c. plexus

d. reticular formation

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34. The brachial plexus supplies nerves that function to contract which of the following?

a. the diaphragm

b. intercostal muscles

c. muscles of the arm and forearm

d. muscles of the lower limb

35. The sciatic nerves arise from which of these plexuses?a. brachial

b. cervical

c. choroid

d. lumbosacral

36. Which of the following combinations of spinal nerves supply the brachial plexuses?

a. C1-C4

b. C1-T1

c. C5-T1

d. T12-S5

37. Which of the following are NOT peripheral nerves associated with the brachial plexuses?a. axillary nerves

b. femoral nerves

c. radial nerves

d. ulnar nerves

38. Which of the following nerves arising from the lumbosacral plexuses are the largest and

longest peripheral nerves in the body?

a. femoral nerves

b. obturator nerves.

c. pudental nerves

d. sciatic nerves

39. Which of the following plexuses is NOT paired with a peripheral nerve originating from it?

a. brachial - radial nerve

b. cervical - phrenic nerve

c. lumbar - femoral nerve

d. sacral - muscuolcutaneous nerve

40. The ventral branches or rami of spinal nerves do NOT join to form nerve plexuses in which of

the following spinal cord areas?

a. cervical

b. lumbarc. sacral

d. thoracic

41. After severely breaking his left humerus in an accident, a man lost sensation on the posterior

aspect of the limb and was unable to extend his forearm, wrist, or fingers. What nerve was

damaged?

a. axillary

b. musculocutaneous.

c. radial

d. ulnar

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42. After severely injuring her hip in an accident, a woman was unable to extend her right leg.

What nerve was damaged?

a. femoral

b. obturator

c. tibiald. pudental

43. The ventral rami of adjacent spinal nerves intermingle with each other to form a

a. ganglion

b. fascicle

c. plexus

d. tract

44. Which of the following nerves arises from the brachial plexus and innervates all of the

extensor muscles of the upper limb?

a. axillary nerve

b. musculocutaneous nerve

c. radial nerve

d. ulnar nerve

45. Compression of what nerve arising from the brachial plexus results in numbness, tingling, and

pain in the fingers, a condition called carpal tunnel syndrome.

a. axillary nerveb. radial nerve

c. median nerve

d. musculocutaneous nerve

46. Which of the nerves arising from the lumbosacral plexus is the largest peripheral nerve in the

body?

a. femoral

b. ischiadic nervec. obturator nerve

d. pudental nerve

47. Before a doctor performs an episiotomy, a cut in the perineum that makes the opening of the

birth canal larger, branches of what nerves arising from the lumbosacral plexuses are

anesthetized?a. femoral nerves

b. ischiadic nerves

c. obturator

d. pudental nerves

48. Nerve fibers in the phrenic nerves that innervate the diaphragm arise primarily from whatplexuses?

a. brachial

b. cervical

c. lumbar

d. sacral

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49. Which pair of spinal nerves does NOT supply any skin area?

a. C1

b. C8

c. T1

d. S1

IV. The Answers

1 = c 2 = a 3 = b 4 = b 5 = d

6 = b 7 = a 8 = b 9 = b 10 = d

11 = b 12 = c 13 = c 14 = b 15 = c

16 = b 17 = b 18 = d 19 = d 20 = d

21 = a 22 = a 23 = d 24 = b 25 = a

26 = a 27 = d 28 = c 29 = d 30 =d

31 = b 32 = b 33 = c 34 = c 35 = d

36 = c 37 = b 38 = d 39 = d 40 = d

41 = c 42 = a 43 = c 44 = c 45 = c

46 = b 47 = d 48 = b 49 = a

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IV. Mcqs Neuro

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