Spinal Tracts Flashcards Preview

[OS 202] Lecture Exam A > Spinal Tracts > Flashcards

Flashcards in Spinal Tracts Deck (50):
1

[Sensory Modality]

What carries fine touch?

Anterior Spinothalamic Tract

2

[Sensory Modality]

What carries fine touch?

Anterior Spinothalamic Tract

3

[Sensory Modality]

What carries pain and temperature?

Lateral Spinothalamic Tract

4

[Sensory Modality]

What carries proprioception and vibration sense?

Dorsal Columns

5

What composes the posterior column tract?

Fasciculus gracilis
Fasciculus cuneatus

6

[Transmits Information From?]

Fasciculus gracilis
Fasciculus cuneatus

Information from areas inferior to T6
Information from areas superior to T6

7

Which is more medial? Fasciculus gracilis or cuneatus?

Gracilis, because it is lower, as taught that neurons that enter earlier are pushed medially

8

What are the second order neurons of the fasciculus gracilis and cuneatus?

Where are they found?

They cross over and enter what?

Nucleus Gracilis
Nucleus Cuneatus

They are found in the medulla oblongata

Medial Lemniscus

9

Third order neurons are always found?

Thalamus

10

Final destination of neurons is always?

Primary Sensory Cortex

11

First order neurons are always found?

Dorsal Root Column

12

Rubbing on the arm alone is wrong for checking because?

It only tests the anterior spinothalamic tract, it is not testing the lateral one which detects heat and pain. So poke them with a pin.

13

What are the 3 Major Spinal Tracts?

1. Dorsal Column
2. Spinothalamic
3. Spinocerebellar

14

What is the convention for naming Spinal Tracts?

Naming Tracts:
If it begins with "spino" the tract is sensory (From spinal cord -> X)
If it ends with "spinal", the tract is motor (Information from X -> Spinal Cord)

15

Stimulation of lower-motor neurons has an [excitatory/non-excitatory]? effect on the skeletal muscle fibers

Excitatory

16

Lower motor neurons always start at?

Anterior Horn

17

What are the two major motor tracts?

Corticospinal Tract
Subconscious Tract

18

Function: Corticospinal Tract

Conscious control of skeletal muscles

19

Function: Subconscious Tract

Subconscious regulation of balance, muscle tone, eye, hand, and upper limb position

20

What are the two types of corticospinal tracts?
What are their functions?

Lateral: Controls limbs
Anterior: Controls axial skeleton

21

Corticospinal Tracts consist of three pairs of descending tracts, what are they?

Corticobulbar Tract
Lateral Corticospinal Tract
Anterior Corticospinal Tract

22

Functions of the Three Pairs of Descending Tracts

Corticobulbar: Conscious control over eye, jaw, and face muscles

Lateral Corticospinal: Conscious control over skeletal muscles of the limbs

Anterior Corticospinal: Conscious control over the axial skeleton

23

[T/F]

All anterior corticospinal nerves decussate (cross over)

F

24

[Subconscious Motor Tract]

What are the four tracts?

Vestibulospinal
Tectospinal
Reticulospinal
Rubrospinal

[Test Maybe Question: Which one of these are not a subconscious tract]

25

Function: Superior Colliculi
Function: Inferior Colliculi

SC: Visual
IC: Auditory

26

[Summary of Somatic Control]

What initiates voluntary movement?
Information goes to? (2)

Cerebral Cortex

Basal Nuclei and Cerebellum

27

[Sensory Modality]

What carries pain and temperature?

Lateral Spinothalamic Tract

28

[Sensory Modality]

What carries proprioception and vibration sense?

Dorsal Columns

29

What composes the posterior column tract?

Fasciculus gracilis
Fasciculus cuneatus

30

[Transmits Information From?]

Fasciculus gracilis
Fasciculus cuneatus

Information from areas inferior to T6
Information from areas superior to T6

31

Which is more medial? Fasciculus gracilis or cuneatus?

Gracilis, because it is lower, as taught that neurons that enter earlier are pushed medially

32

What are the second order neurons of the fasciculus gracilis and cuneatus?

Where are they found?

They cross over and enter what?

Nucleus Gracilis
Nucleus Cuneatus

They are found in the medulla oblongata

Medial Lemniscus

33

Third order neurons are always found?

Thalamus

34

Final destination of neurons is always?

Primary Sensory Cortex

35

First order neurons are always found?

Dorsal Root Column

36

Rubbing on the arm alone is wrong for checking because?

It only tests the anterior spinothalamic tract, it is not testing the lateral one which detects heat and pain. So poke them with a pin.

37

What are the 3 Major Spinal Tracts?

1. Dorsal Column
2. Spinothalamic
3. Spinocerebellar

38

What is the convention for naming Spinal Tracts?

Naming Tracts:
If it begins with "spino" the tract is sensory (From spinal cord -> X)
If it ends with "spinal", the tract is motor (Information from X -> Spinal Cord)

39

Stimulation of lower-motor neurons has an [excitatory/non-excitatory]? effect on the skeletal muscle fibers

Excitatory

40

Lower motor neurons always start at?

Anterior Horn

41

What are the two major motor tracts?

Corticospinal Tract
Subconscious Tract

42

Function: Corticospinal Tract

Conscious control of skeletal muscles

43

Function: Subconscious Tract

Subconscious regulation of balance, muscle tone, eye, hand, and upper limb position

44

What are the two types of corticospinal tracts?
What are their functions?

Lateral: Controls limbs
Anterior: Controls axial skeleton

45

Corticospinal Tracts consist of three pairs of descending tracts, what are they?

Corticobulbar Tract
Lateral Corticospinal Tract
Anterior Corticospinal Tract

46

Functions of the Three Pairs of Descending Tracts

Corticobulbar: Conscious control over eye, jaw, and face muscles

Lateral Corticospinal: Conscious control over skeletal muscles of the limbs

Anterior Corticospinal: Conscious control over the axial skeleton

47

[T/F]

All anterior corticospinal nerves decussate (cross over)

F

48

[Subconscious Motor Tract]

What are the four tracts?

Vestibulospinal
Tectospinal
Reticulospinal
Rubrospinal

[Test Maybe Question: Which one of these are not a subconscious tract]

49

Function: Superior Colliculi
Function: Inferior Colliculi

SC: Visual
IC: Auditory

50

[Summary of Somatic Control]

What initiates voluntary movement?
Information goes to? (2)

Cerebral Cortex

Basal Nuclei and Cerebellum