Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

BAB > L03: Overview Of Ascending And Descending Tracts > Flashcards

L03: Overview Of Ascending And Descending Tracts Flashcards

1
Q

What type of information does ascending tracts carry

A

Sensory information

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the 2 regions that ascending tracts are separated to

A

Head and neck region

Rest of the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which specific nerve is involves in the ascending tract of the head and neck region

A

Trigeminal nerve (CN5)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the 2 main sensory organs in the body

A

Skin

Muscles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a dermatome

A

A slice of skin whose sensation is conducted by a SINGLE spinal nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does muscles senses

A

Position in 3D i.e propioception

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does general sensory afferent sense

A

Pain and temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does propioceptive afferents detect

A

Propioception

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the sense organs for propioception

A

Muscle spindles
Golgi tendon organs
Joint receptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is a sensory homonculus

A

Represents the emphasises of sensation in the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which parts in the sensory homonculus emphasis sensation

A

Hands and head

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does it mean to have a big hand in the sensory homonculus

A

Sensation of the fingers is significant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the 3 types of ascending tracts that take sensory information to the brain

A

Dorsal columns
Spinothalamic tract
Dorsal and ventral spinocerebellar tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the 2 tracts that the dorsal column is spit into

A

Fascilus gracilis

Fasiculus cuneatus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which part of the body does the fasiculus cuneatus carry the sensation of

A

Upper part of the body (above T4)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What part of the body does the fasiculus gracilis carry the sensation of

A

Lower part of the body (below t4)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are the 2 tracts that the spinothalamic tract split into

A

Anterolateral

Lateral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the spinocerebellar tract split into

A

Dorsal spinocerebellar tract

Ventral spinocerebellar tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What type of sensory information does the lateral/anterolateral spinothalamic tract carry

A

Pain
Temperature
Crude touch (non-discriminative touch i.e you cannot localise where you have been touched)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What type of sensory information does the dorsal column carry

A

Tactile sensation

Propioceptive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is tactile sensation

A

Very light sensation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What type of sensory information does the dorsal/ventral spinocerebellar tract carry

A

Propioception only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Which 2 ascending tracts take the signal to the brain (primary sensory cortex)

A

Spinothalamic tract

Dorsal column

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Which ascending tracts take the signal to the cerebellum

A

Dorsal/ventral spinocerebellar tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Therefore which ascending tract is involves in conscious sensation
Dorsal columns | Spinothalamic tract
26
Which ascending tract is involved in non-conscious sensation
Spinocerebellar Tract
27
What is the arrangement of neurones in the dorsal columns and spinothalamic tract
1st order neurone 2nd order neurone 3rd order neurone
28
What is similar in the dorsal columns and spinothalamic tract
They have 3 neurones involved
29
What is the difference in the tracts of the dorsal column and spinothalamic tract
The way they get to the brain
30
Where is the cell body of the 1st order neurone/primary neurone found
Dorsal root ganglion
31
Where does the axon of the primary neurone terminate in the spinothalamic tract
Dorsal horn of the spinal cord
32
Where does the axon of the primary neurone split
Posterolateral tract of lissauer
33
How does the axon of the primary neurone split
Same spinal level One spinal level above One spinal level below
34
If the tract is a anterolateral spinothalamic tract which happens to the second neurone from the dorsal horn
Is passes/decusates under the central canal to cros the controlateral side (opposite side)
35
Where does the second order neurone of the anterolateral spinothalamic tract terminate
Ventral posterior lateral nucleus at thalamus
36
Which part of the white matter does the spinothalamic tract ascend in
Lateral funiculus
37
If the ascending tract is the dorsal column what happens to the 1st order neurone from the dorsal horn of the spinal cord
It ascending on the same side of the spinal cord until the medulla where it terminates to become the second order neurone
38
Where does the second order neurone of the dorsal column begin
In the medulla
39
What happens to the second order neurone at the medulla
The second order neurone decussates at the medulla to the controlateral side
40
Where does the second order neurone terminate for both the dorsal column and spinothalamic tract
Thalamus to become the third order neurone
41
What is syringomyelia
Scared tissue in the spinal cord that forms fibrosis and cuts off fibres of the spinothalamic tract
42
What is the brown sequard syndrome
Pain of controlateral side if lost
43
Which 2 lobes does the central sulcus separate
Frontal lobe | Parietal lobe
44
Which lobe is the sensory cortex in
Parietal lobe
45
Which lobe is the motor cortex in
Frontal lobe
46
What is the gyrus of the primary motor cortex known as
Pre-central gyrus
47
What sit eh gyrus of the sensory cortex known as
Post -central gyrus
48
After the ascending tract has fed into the brain how does the brain trigger movement
By the descending tract
49
What is the motor homonculus
Representation of the muscles where it is big in the head and hands
50
What does the brain command the muscles to do
Contact Or Rest
51
Which muscle does the right motor cortex control
Left muscles of the body
52
Which muscles does the left motor cortex control
Right muscles of the body
53
Why does the right motor cortex control the left muscles and vice versa
Due to decassation
54
What are the 2 classes of descending tracts
1) tracts that have cell body at primary motor cortex | 2) tract that starts at the brain stem
55
What are the effector organs of the descending tract
Skeletal muscle
56
What are the neurones that innervate the skeletal muscle called
Moto neurones
57
What are the 2 categories of motor neurones
Motor neurone that has cell body in brain = upper motor neurone Motor neurone that has cell body in the spinal cord= lower motor neurone
58
What does the axon to the upper motorneurones travel as
Descending tracts
59
What does the axon of the lower motor neurone travel as
Motor efferent
60
What is the location of the descending tracts in the spinal cord
Lateral funicilus | Anterior

BAB (21 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions