Final Exam: Proprioception

Question 1

Asssesses body position in space

Answer 1

proprioception

Question 2

What is the function of the golgi tendon organs

Answer 2

joint angle and tendon tension

Question 3

Proprioception is carried by conscious/unconscious pathways that terminate in the cerebral cortex

Answer 3

conscious

Question 4

Proprioception is carried by conscious/unconscious pathways that terminate at the cerebellum.

Answer 4

Unconscious

Question 5

What is a CP deficit?

Answer 5

conscious proprioception deficit

Question 6

T/F. proprioception cannot be tested in a paralyzed patient

Answer 6

f.

Question 7

How is proprioception sent to the brain?

Answer 7

via afferent neurons in the dorsal column of the medial limniscus (DCML)

Question 8

T/F. Axons of DCML are small and lightly myelinated.

Answer 8

F. Large and Heavily myelinated

Question 9

How is sensation lost for an animal?

Answer 9

PMS

1. proprioception
2. motor
3. Sensory

Question 10

What are the 3 reasons for neurologic gait?

Answer 10

1. Proprioceptive
2. Vestibular
3. Cerebellar

Question 11

Where does conscious proprioception terminate?

Answer 11

Parietal lobe of the cerebrum in the somatosensory cortex

Question 12

abnormal gait due to neurologic dysfunction

Answer 12

Ataxia

Question 13

What are the two primary pathways for proprioception

Answer 13

1. dorsal column

2. trigeminal pathway

Question 14

What pathway of proprioception covers from the neck down?

Answer 14

dorsal column

Question 15

What pathway of proprioception covers the face

Answer 15

trigeminal

Question 16

Main purpose of this system is to present afferent information to cortex about body position

Answer 16

conscious proprioception

Question 17

DCML pathway receptors:

Answer 17

Proprioceptors

Question 18

What are the 3 afferent proprioceptors?

Answer 18

1. skin mechanoreceptors
2. Muscle spindles detect change in m. lenght
3. Golgi tendon organs detect tension in tendons and joint capsules

Question 19

grand relayer of all things sensory

Answer 19

Thalamus

Question 20

Pelvic limb pathway travels though the fasciculus _____

Answer 20

gracilis

Question 21

Thoracic limb pathway traves through the fasciculus ______

Answer 21

cuneatus

Question 22

What is more lateral, the fasciculus gracilis or cuneatus?

Answer 22

cuneatus

Question 23

Proprioceptive fibers ascent the spinal cord ______ then secussates at the brain stem

Answer 23

Ipsilaterally

Question 24

What is the recipe for proprioception:

Answer 24

1. receptor
2. spinal cord segment
3. fasciculus gracilis or fasciculus cuneatus
4. decussation in the brain stem (medulla)
5. carried to cerebral cortex (parietal lobe)

Question 25

You have an animal presenting with dec. CP of the right pelvic limb. provide a possible location of the lesion: a. mechanoreceptive primary n. ending b. lumbar intumescence c. right fasciculus gracilis d. parietal lobe e. all of the above

Answer 25

e. all of the above

Question 26

Pathway of proprioception that is conscious proprioception from the face to cortex

Answer 26

Trigeminal pathway

Question 27

All proprioceptive info from one side of the body reache the _same/opposite_ somatosensory cortex

Answer 27

Opposite

Question 28

Neurologic gate abnormality:

Answer 28

ataxia

Question 29

What type of gait do dogs have during atxia

Answer 29

wide swing phase of gait | longer stride with crouch appearance

Question 30

What test do you do to test proprioceptive deficits

Answer 30

Postural reaction tests | aka conscious proprioceptive tests (CP test)

Question 31

What are the 5 CP tests

Answer 31

1. proprioceptive positioning 2. Wheelbarrowing 3. hopping 4. hemistanding/walking 5. placing

Question 32

What are the clinical signs of proprioceptive ataxia

Answer 32

abnormal postural reactions | failure to pass CP test

Question 33

Lesions to what 3 areas could cause vestibular ataxia?

Answer 33

1. Vestibular nuclei 2. CN VII 3. Vestibular receptors

Question 34

What are the c/s of vestibular ataxia

Answer 34

1. abnormal nystagmus 2. head tilt 3. head turn 4. leaning 5. falling

Question 35

Lesions to what would cause cerebellar ataxia

Answer 35

Cerebellum

Question 36

What are some C/S of cerebellar ataxia?

Answer 36

abnormal rate, range, and force of movement

Question 37

T/F in cerebellar ataxia there is no CP deficit.

Answer 37

T

Question 38

T/F in vestibular ataxia there is no CP deficit

Answer 38

T

Question 39

T/F vestibular ataxia causes paresis

Answer 39

F

Question 40

A lesion in the right parietal lobe would lead to CP deficits in the: a. left thoracic limb b. left pelvic limb c. right thoracic limb d. right pelvic limb e. Both A and B f. Both C and D

Answer 40

e.

Question 41

Does an animal with a cerebellar lesion have CP deficits? a. yes b. no

Answer 41

b. no

Question 42

Proprioception is often the _first/last_ sense affected during compressive spinal injury

Answer 42

First

Question 43

What is the cascade of sensory loss in compressive spinal injury

Answer 43

1. Proprioception 2. motor 3. superficial pain 4. deep pain