Deck 14: Sensory and Motor Pathways

Question 1

Axons from what type of neuron innervate skeletal muscles of the trunk and extremities?

Answer 1

Alpha motor neuronsLower motor neurons

Question 2

What are the three cordlike segments into which the white matter of the spinal cord is divided?

Answer 2

Dorsal funiculus, lateral funiculus, ventral funiculus

Question 3

What two nerve tracts compose the dorsal funiculus?

Answer 3

Fasciculus gracilis and fasciculus cuneatus

Question 4

What do the axons of the second-order neuron have in common?

Question 5

What is the primary sensory area of the brain?

Question 6

Where do second-order neurons in the head ascend after they decussate?

Question 7

What is the primary motor area of the brain?

Question 8

The ventral horns are the sensory portion of the spinal cord.

Question 9

First-order sensory neurons for the body are located in the dorsal root ganglion.

Question 10

The dorsal horns are the motor portion of the spinal cord.

Question 11

Dorsal root ganglia are located outside the central nervous system.

Question 12

The lateral funiculus lies between the dorsal median fissure and the ventral median fissure.

Question 13

The dorsal funiculus lies between the dorsal and ventral horns of the spinal cord.

Question 14

Axons from alpha motor neurons exit the spinal cord through the ventral root.

Question 15

Lower motor neurons are located exclusively in the spinal cord.

Question 16

Tracts carrying sensory information are composed of a two-neuron chain.

Question 17

The trigeminal nerve contains second-order neurons.

Question 18

The dorsal columns ascend the ____________________ side of the spinal cord to synapse with second-order neurons in the medulla.

Question 19

Skeletal muscles are controlled by ____________________ located in the gray matter of the spinal cord or brainstem.

Question 20

Sensory nerve fibers are organized into ____________________ that are located in the white matter of the brain and spinal cord.

Question 21

Cell bodies of neurons in the spinal cord are located in a central column of ____________________.

Question 22

Sensory nerve fibers are located in the ____________________ of the brain and spinal cord.

Question 23

White matter is divided into three cordlike segments called ____________________.

Question 24

The ____________________ is the white matter between the ventral horn and the ventral median fissure.

Question 25

The sense of movement in space of the muscles and the body is termed ____________________.

Question 26

Sensory nerve fibers that discriminate touch from the upper extremity will synapse on third-order neurons in the ____________________ thalamus.

Question 27

A ____________________ is an aggregation of nerve cell bodies inside the central nervous system.

Question 28

Motor nerve fibers enter spinal nerves by traveling through the ____ to reach skeletal muscle.

A) dorsal root
B) ventral root
C) tracts
D) dorsal root ganglion
E) dorsal horn

Question 29

Cell bodies of pseudounipolar neurons are located in which of the following structures?

A) Dorsal root
B) Ventral root
C) Dorsal root ganglion
D) Ventral horn
E) Dorsal horn

Question 30

Cell bodies for third-order neurons carrying sensory information are located in the

A) ventral horn.
B) dorsal horn.
C) dorsal root ganglion.
D) thalamus.
E) brainstem.

Question 31

Cell bodies for first-order neurons carrying sensory information are located in the

A) ventral horn.
B) dorsal horn.
C) dorsal root ganglia.
D) thalamus.
E) brainstem.

Question 32

Axons from third-order neurons for touch and proprioception synapse with neurons in which of the following structures?

A) Cerebellum
B) Thalamus
C) Spinal cord
D) Brainstem
E) Cerebrum

Question 33

What is the location of second-order neurons carrying pain fibers from the upper limb?

A) Ventral horn
B) Fasciculus gracilis
C) Dorsal horn
D) Fasciculus cuneatus
E) Thalamus

Question 34

The sense of vibration from the lower extremities is carried through the (select all that apply)

A) fasciculus cuneatus.
B) fasciculus gracilis.
C) ventral funiculus.
D) lateral funiculus.
E) dorsal funiculus.

Question 35

Which of the following neurons have fibers that cross in the brainstem or the spinal cord? (Select all that apply.)

A) Spinal nucleus of V
B) Upper motor neurons
C) Second-order neurons
D) Lower motor neurons
E) Pseudounipolar neurons

Question 36

Nerve fibers that sense pressure from the upper extremities are carried through the (select all that apply)

A) fasciculus cuneatus.
B) fasciculus gracilis.
C) ventral funiculus.
D) lateral funiculus.
E) dorsal funiculus.

Question 37

Motor movements are controlled by which of the following tracts? (Select all that apply.)

A) Lateral spinothalamic tract
B) Ventral corticospinal tract
C) Trigeminothalamic tract
D) Lateral corticospinal tract
E) Ventral spinothalamic tract

Question 38

Match each description with the correct term.

-Primary motor area

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 39

Match each description with the correct term.

-Structures that receive motor input

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 40

Match each description with the correct term.

-Division of white matter

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 41

Match each description with the correct term.

-Primary sensory area

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 42

Match each description with the correct term.

-Control fine motor movement

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 43

Match each description with the correct term.

-Structures that receive sensory stimuli

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 44

Match each description with the correct term.

-Bundle of white matter in the spinal cord

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 45

Match each description with the correct term.

-Lower motor neuron

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 46

Match each description with the correct term.

-Cross the midline

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 47

Match each description with the correct term.

-Tracts of the dorsal funiculus

A) Dorsal columns
B) Tract
C) Alpha motor neuron
D) Effectors
E) Receptors
F) Funiculus
G) Lateral spinothalamic tract
H) Efferent
I) Decussate
J) Precentral gyrus
K) Thalamus
L) Postcentral gyrus
M) Corticospinal tracts
N) Afferent

Question 48

Match the structures with their locations. There is only one correct answer.

-Third-order neurons

A) Ventral horn
B) Spinal nucleus of V
C) Pons
D) Collateral ganglia
E) Fasciculus cuneatus
F) Precentral gyrus
G)Thalamus
H) Splanchnic nerves

Question 49

Match the structures with their locations. There is only one correct answer.

-Postganglionic sympathetic neurons innervating the stomach and intestines

A) Ventral horn
B) Spinal nucleus of V
C) Pons
D) Collateral ganglia
E) Fasciculus cuneatus
F) Precentral gyrus
G)Thalamus
H) Splanchnic nerves

Question 50

Match the structures with their locations. There is only one correct answer.

-Lower motor neurons

A) Ventral horn
B) Spinal nucleus of V
C) Pons
D) Collateral ganglia
E) Fasciculus cuneatus
F) Precentral gyrus
G)Thalamus
H) Splanchnic nerves

Question 51

Match the structures with their locations. There is only one correct answer.

-Fibers of second-order neurons for touch and vibration to the upper limb

A) Ventral horn
B) Spinal nucleus of V
C) Pons
D) Collateral ganglia
E) Fasciculus cuneatus
F) Precentral gyrus
G)Thalamus
H) Splanchnic nerves

Question 52

Match the structures with their locations. There is only one correct answer.

-Preganglionic sympathetic fibers

A) Ventral horn
B) Spinal nucleus of V
C) Pons
D) Collateral ganglia
E) Fasciculus cuneatus
F) Precentral gyrus
G)Thalamus
H) Splanchnic nerves