Lab 8

Question 1

Reflex

Answer 1

A quick, involuntary response to a stimulus

Question 2

Somatic reflexes

Answer 2

Produce a response in skeletal muscle

Question 3

Autonomic reflexes

Answer 3

Produce a response in smooth/cardiac muscle or glands

Question 4

What is the test for the pupillary light reflex?

Answer 4

Subject sits with closed eyes for one minute, then a light is flashed into their eyes

Question 5

What is the normal response for the pupillary light reflex?

Answer 5

Pupil constriction in response to retina stimulation by bright light

Question 6

Which cranial nerve contains the sensory fibers for the pupillary light reflex?

Answer 6

II - optic nerve

Question 7

Which cranial nerve contains the motor fibers for the pupillary light reflex?

Answer 7

III - oculomotor nerve

Question 8

What is the test for the ciliospinal reflex?

Answer 8

Tester pinches the back of subject’s neck firmly

Question 9

What is the normal response for the ciliospinal reflex?

Answer 9

Pupil dilation in response to a painful stimulus

Question 10

What is the test for the oculocardiac reflex?

Answer 10

Tester records seated subject’s pulse. Subject then applies pressure to their eyes and tester records pulse again

Question 11

What is the normal response for the oculocardiac reflex?

Answer 11

A slowing/decrease in pulse in response to pressure over eyes

Question 12

Which cranial nerve contains the sensory fibers for the oculocardiac reflex?

Answer 12

V - trigeminal nerve

Question 13

Which cranial nerve contains the motor fibers for the oculocardiac reflex?

Answer 13

X - vagus nerve

Question 14

What is the test for the patellar reflex?

Answer 14

Subject sits in a chair with legs crossed and eyes closed. Tester taps patellar tendon with a rubber hammer

Question 15

What is the normal response for the patellar reflex?

Answer 15

Knee extension

Question 16

What is the test for the Achilles’ reflex?

Answer 16

Subject stands with one knee on a chair and relaxes leg muscles. Tester dorsiflexes subject’s foot to stretch gastrocnemius muscle and taps the Achilles’ tendon with a rubber hammer

Question 17

What is the normal response for the Achilles’ reflex?

Answer 17

Slight plantarflexion

Question 18

What is the test for the babinski reflex?

Answer 18

Subject is barefoot. Tester runs the tip of a rubber hammer on the subject’s sole from the heel to the arch

Question 19

What is the normal response for the babinski reflex?

Answer 19

No response

Question 20

What is the abnormal response for the babinski reflex? Who would present this way?

Answer 20

Dosiflexion and spread toes

Children under 2 or those with CNS damage

Question 21

List 5 ways to test cerebellar function.

Answer 21

1. Stretch both arms to the side and snap the fingers of both hands
2. Turn to the side and look straight ahead. Walk a straight line placing the heel of one foot directly in front of the toe of the other foot
3. Close your eyes and touch your nose with the index finger of your left hand.
4. Close your eyes and touch your nose with the index finger of your right hand.
5. Stand erect and move the heel of your right foot up and down the shin of your left leg.

Question 22

Which reflexes are classified as autonomic?

Answer 22

Pupillary light reflex
Ciliospinal reflex
Oculocardiac reflex

Question 23

Which reflexes are classified as somatic?

Answer 23

Patellar reflex
Achilles’ reflex
Babinski reflex