Motor & Sensory Pathways Practice Questions

Question 1

Where is the decussation of the DCML system?

Answer 1

Caudal medulla

Question 2

Where are the cell bodies of the 3rd order neurons located, the ones that terminate in the cerebral cortex?

Answer 2

Thalamus

Question 3

What is Clarke’s column (Clarke’s nucleus)?

Answer 3

Origin of posterior spinocerebellar tract

Question 4

Which of the following describes the spinal trigeminal system?
A) controls the muscles of mastication
B) conveys tactile info from the head and face
C) conveys info on pain and temp from the head and neck
D) a descending pathway from cranial nerve to spinal cord
E) sends APs directly to the thalamus

Answer 4

C) conveys info on pain and temp from the head and neck

Question 5

All tracts in the anterior funiculus tend to affect

Answer 5

Axial motor neurons

Question 6

Which of the following can also be called the spinotectal tract?

Answer 6

Spinomesencephalic tract

Question 7

Which of the following is associated with attempted movement?

Answer 7

Anterior spinocerebellar tract

Question 8

Afferents for pain and temp enter the dorsal horn at the

Answer 8

Substantia gelatinosa

Question 9

Damage to the lateral spinothalamic tract (LSTT) will result in

Answer 9

Loss of pain and thermal sensation

Question 10

T/F: in the posterior column pathway, additional fibers add laterally

Answer 10

True

Question 11

The ribbon of axons formed by ascending posterior column fibers is known as the

Answer 11

Medial lemniscus

Question 12

Ascending fibers within the gracile fasciclus synapses in the ____________ nucleus

Answer 12

gracile

Question 13

______% of the fibers in the descending corticospinal tract cross in the pyramidal decussation

Answer 13

85

Question 14

Which tract is responsible for reflex movements of the head and neck to visual stimuli?

Answer 14

Tectospinal tract

Question 15

In the spinal cord, another word used in place of funicular is

Answer 15

Column

Question 16

Spinocerebellar pathways are located in the ___________ columns

Answer 16

lateral

Question 17

T/F: all ascending tracts reach the cerebral cortex

Answer 17

false

Question 18

Endings in hair follicles would most likely transmit via which pathway?

Answer 18

ventral spinothalamic tract

Question 19

Which pathway has 2nd order neurons in the nucleus proprius?

Answer 19

anterior spinothalamic tract

Question 20

Sharp, fast localized pain is transmitted by what fibers?

Answer 20

A delta

Question 21

Lissaur’s tract is associated with which ascending pathway?

Answer 21

lateral spinothalamic tract

Question 22

2 point discrimination from the hand projects to a 2nd order neuron located where __________________ is

Answer 22

nucleus cuneatus

Question 23

In the lateral spinothalamic tract, the 2nd order neurons have axons that project
A) ipsilateral
B) bilateral
C) contralateral

Answer 23

C) contralateral

Question 24

Which of the following tracts projects many axons to the RF?
A) corticospinal tract
B) anterior spinocerebellar tract
C) anterior spinothalamic tract
D) DCML
E) lateral spinothalamic tract

Answer 24

E) lateral spinothalamic tract

Question 25

What tract is this?

Answer 25

rubrospinal tract

Question 26

Which tract is this?

Answer 26

anterior spinothalamic tract

Question 27

What tract is this?

Answer 27

lateral spinothalamic tract

Question 28

GSAs within the trigeminal n. join which ascending pathway?

Answer 28

dorsal column pathway

Question 29

Conscious proprioception is transmitted by the ____________

Answer 29

DCML

Question 30

Which proprioceptive pathway starts with 1st order neurons between L1 and S2?

Answer 30

anterior spinocerebellar tract

Question 31

All descending tracts in the anterior funicular tend to affect

Answer 31

axial motor neurons

Question 32

Unconscious proprioception from the upper limbs ascends as the ____________ tract

Answer 32

cuneocerebellar