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

Spinal Tracts Flashcards

1
Q

[Sensory Modality]

What carries fine touch?

A

Anterior Spinothalamic Tract

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2
Q

[Sensory Modality]

What carries fine touch?

A

Anterior Spinothalamic Tract

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3
Q

[Sensory Modality]

What carries pain and temperature?

A

Lateral Spinothalamic Tract

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4
Q

[Sensory Modality]

What carries proprioception and vibration sense?

A

Dorsal Columns

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5
Q

What composes the posterior column tract?

A

Fasciculus gracilis

Fasciculus cuneatus

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6
Q

[Transmits Information From?]

Fasciculus gracilis
Fasciculus cuneatus

A

Information from areas inferior to T6

Information from areas superior to T6

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7
Q

Which is more medial? Fasciculus gracilis or cuneatus?

A

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

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8
Q

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

Where are they found?

They cross over and enter what?

A

Nucleus Gracilis
Nucleus Cuneatus

They are found in the medulla oblongata

Medial Lemniscus

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9
Q

Third order neurons are always found?

A

Thalamus

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10
Q

Final destination of neurons is always?

A

Primary Sensory Cortex

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11
Q

First order neurons are always found?

A

Dorsal Root Column

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12
Q

Rubbing on the arm alone is wrong for checking because?

A

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.

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13
Q

What are the 3 Major Spinal Tracts?

A
  1. Dorsal Column
  2. Spinothalamic
  3. Spinocerebellar
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14
Q

What is the convention for naming Spinal Tracts?

A

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)

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15
Q

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

A

Excitatory

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16
Q

Lower motor neurons always start at?

A

Anterior Horn

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17
Q

What are the two major motor tracts?

A

Corticospinal Tract

Subconscious Tract

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18
Q

Function: Corticospinal Tract

A

Conscious control of skeletal muscles

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19
Q

Function: Subconscious Tract

A

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

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20
Q

What are the two types of corticospinal tracts?

What are their functions?

A

Lateral: Controls limbs
Anterior: Controls axial skeleton

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21
Q

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

A

Corticobulbar Tract
Lateral Corticospinal Tract
Anterior Corticospinal Tract

22
Q

Functions of the Three Pairs of Descending Tracts

A

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
Q

[T/F]

All anterior corticospinal nerves decussate (cross over)

A

F

24
Q

[Subconscious Motor Tract]

What are the four tracts?

A

Vestibulospinal
Tectospinal
Reticulospinal
Rubrospinal

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

25
Q

Function: Superior Colliculi
Function: Inferior Colliculi

A

SC: Visual
IC: Auditory

26
Q

[Summary of Somatic Control]

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

A

Cerebral Cortex

Basal Nuclei and Cerebellum

27
Q

[Sensory Modality]

What carries pain and temperature?

A

Lateral Spinothalamic Tract

28
Q

[Sensory Modality]

What carries proprioception and vibration sense?

A

Dorsal Columns

29
Q

What composes the posterior column tract?

A

Fasciculus gracilis

Fasciculus cuneatus

30
Q

[Transmits Information From?]

Fasciculus gracilis
Fasciculus cuneatus

A

Information from areas inferior to T6

Information from areas superior to T6

31
Q

Which is more medial? Fasciculus gracilis or cuneatus?

A

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

32
Q

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

Where are they found?

They cross over and enter what?

A

Nucleus Gracilis
Nucleus Cuneatus

They are found in the medulla oblongata

Medial Lemniscus

33
Q

Third order neurons are always found?

A

Thalamus

34
Q

Final destination of neurons is always?

A

Primary Sensory Cortex

35
Q

First order neurons are always found?

A

Dorsal Root Column

36
Q

Rubbing on the arm alone is wrong for checking because?

A

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
Q

What are the 3 Major Spinal Tracts?

A
  1. Dorsal Column
  2. Spinothalamic
  3. Spinocerebellar
38
Q

What is the convention for naming Spinal Tracts?

A

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
Q

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

A

Excitatory

40
Q

Lower motor neurons always start at?

A

Anterior Horn

41
Q

What are the two major motor tracts?

A

Corticospinal Tract

Subconscious Tract

42
Q

Function: Corticospinal Tract

A

Conscious control of skeletal muscles

43
Q

Function: Subconscious Tract

A

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

44
Q

What are the two types of corticospinal tracts?

What are their functions?

A

Lateral: Controls limbs
Anterior: Controls axial skeleton

45
Q

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

A

Corticobulbar Tract
Lateral Corticospinal Tract
Anterior Corticospinal Tract

46
Q

Functions of the Three Pairs of Descending Tracts

A

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
Q

[T/F]

All anterior corticospinal nerves decussate (cross over)

A

F

48
Q

[Subconscious Motor Tract]

What are the four tracts?

A

Vestibulospinal
Tectospinal
Reticulospinal
Rubrospinal

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

49
Q

Function: Superior Colliculi
Function: Inferior Colliculi

A

SC: Visual
IC: Auditory

50
Q

[Summary of Somatic Control]

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

A

Cerebral Cortex

Basal Nuclei and Cerebellum

[OS 202] Lecture Exam A (14 decks)

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