CNS Exam 2

Question 1

Sensory information arriving at one side of the body or head typically reaches the cerebral cortex of the contralateral side. The axons that cross the midline to accomplish this are the axons of:

Answer 1

2nd Order Neurons

Question 2

Which pathway carries pain sensation to the cerebrum?

Answer 2

Spinothalamic

Question 3

A 63 year old man has a loss of discriminative touch, vibratory sense, and proprioception on his right arm. Where are the cell bodies for the second order neurons in the pathway located?

Answer 3

Cuneate Nucleus

Question 4

Dermatome of upper arm:

Answer 4

C7

Question 5

Type of nocioceptor:

Answer 5

Free nerve ending

Question 6

Follicular receptor =

Answer 6

Mechanoreceptor

Question 7

Stimulus of a stretch receptor:

Answer 7

Muscle spindle

Question 8

Which of the following is not encapsulated?

Answer 8

Merkel’s

Question 9

Which of the following is for vibration?

Answer 9

Pacinian

Question 10

Pain sensation to the cerebellum:

Answer 10

Spinothalamic

Question 11

Left arm, left leg weakness:

Answer 11

Right cerebellum

Question 12

What does not contain coricobulber fibers?

Answer 12

Lateral Corticospinal

Question 13

Patellar reflex is an example of:

Answer 13

Myotatic

Question 14

Fibers cross:

Answer 14

Withdrawal reflex

Question 15

Aging motor units:

Answer 15

Decrease with time

Question 16

How many neurons in a reflex?

Answer 16

2

Question 17

Upper arm:

Answer 17

Cuneate tract

Question 18

Muscle contraction:

Answer 18

Gamma

Question 19

Excessive contraction prevented by the:

Answer 19

Golgi tendon organ

Question 20

Which receptors are within the body?

Answer 20

Interoreceptors

Question 21

Stimuli from the internal environment?

Answer 21

Interoceptor

Question 22

The older you get the ______ motor units you will have.

Answer 22

Less/fewer

Question 23

Reticular formation is located in the ___________.

Answer 23

Tegmentum of pons, medulla, and midbrain

Question 24

Alpha motor neurons are located where?

Answer 24

Gray matter of spinal cord.

Question 25

Proprioceptive sensation of the lower limb is carried by what?

Answer 25

Gracile

Question 26

Sensory information arriving at one side of the body or head typically reaches the vertebral cortex of the contralateral side. The axons that cross the midline to access this are axons of what?

Answer 26

2nd Order Neurons

Question 27

What is the tract that turns your head in response to a stimulus?

Answer 27

Tectospinal tract

Question 28

Which reflex requires synapses over several spinal segments?

Answer 28

Withdrawl

Question 29

What does not contain corticobulbar fibers?

Answer 29

Lateral corticospinal

Question 30

Which pathway carries pain to the cerebrum?

Answer 30

Spinothalamic tract

Question 31

The area of skin innervated by a single nerve and its receptors is called a?

Answer 31

Dermatome

Question 32

What are the crossing fibers of the gracile nucleus called?

Answer 32

Internal arucate fibers

Question 33

The posterior spinocerebellar tract originates from which nucleus?

Answer 33

Dorsal Thoracic

Question 34

Nocioreceptors are ________

Answer 34

Free nerve ending

Question 35

Patellar reflex is:

Answer 35

myotactic

Question 36

Vestibulospinal tract nucleus is located in?

Answer 36

Lateral vestibular nucleus

Question 37

Gracile nucleus/ fasciculus is located in?

Answer 37

Dorsal Root Ganglion (DRG)

Question 38

Level of awareness?

Answer 38

Recticular activating system.