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Neuroanatomy (Final) > Ascending Tracts > Flashcards

Ascending Tracts Flashcards

1
Q

What information is being conveyed in Dorsal Column- Medial Lemniscus?

A

2-point touch, light touch, joint position sense, vibration, and pressure.

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2
Q

Where is the 1st order cell bodies located in Dorsal Column- Medial Lemniscus?

A

Dorsal Root Ganglia (DRG)

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3
Q

Where is the 2nd order cell bodies located in Dorsal Column- Medial Lemniscus?

A

Nucleus gracilis and nucleus cuneatus

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4
Q

Where is the 3rd order cell bodies located in Dorsal Column- Medial Lemniscus?

A

Ventral posterior lateral (VPL) nucleus of thalamus

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5
Q

Where does the Dorsal Column- Medial Lemniscus terminate?

A

Postcentral gyrus and paracentral lobule (posterior part)

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6
Q

What information does Neo- and paleo- spinothalamic tract convey?

A

Sharp, well localized discriminatory pain, temperature, and light touch

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7
Q

Where is the 1st order cell bodies located in Neo- and paleo- spinothalamic tract? And what type of fibers?

A

Neo: Dorsal root ganglia (DRG); A- delta fibers
Paleo: C Fibers

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8
Q

Where is the 2nd order cell bodies located in Neo- and paleo- spinothalamic tract?

A

Neo: Lamina 1, 5 Paleo: Lamina 7, 8

Dorsal horn laminae/ substantia gelatinosia

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9
Q

Is Neo- and paleo- spinothalamic tract crossed? If so, where?

A

Yes; in ventral white commissure (VWC)

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10
Q

Where is the 3rd order cell bodies located in Neo- and paleo- spinothalamic tract?

A

VPL (neo), and intralaminar (paleo) thalamic nucleus

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11
Q

Where does Neo- and paleo- spinothalamic tract terminate?

A
  • Postcentral gyrus and paracentral lobule posterior part (Neo)
  • Intralaminar thalamic nucleus to widespread cortex
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12
Q

Does Neo- and paleo- spinothalamic tract uses Lissauer’s tract?

A

YES

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13
Q

Is Neospinothalamic tract ipsilateral or contralateral?

A

Contralateral

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14
Q

Is Paleo- spinothalamic tract ipsilateral or contralateral?

A

Contralateral

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15
Q

Lesion at the neospinothalamic tract will cause?

A

Contralateral loss of pain and temperature at that level and down.

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16
Q

Lesion at the Ventral white commissure of the neospinothalamic tract will cause?

A

Bilateral loss of pain and temperature at that level ONLY.

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17
Q

Lesion at the DRG of the neospinothalamic tract will cause?

A

Ipsilateral loss of pain and temperature at that dermatome.

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18
Q

What information does Dorsal Spinocerebellar Tract convey?

A

Unconscious proprioception (of joints) from the trunk and lower extremities (some touch and pressure)

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19
Q

1st order neuron cell bodies of Dorsal Spinocerebellar Tract is located?

A

DRG

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20
Q

2nd order neuron cell bodies of Dorsal Spinocerebellar Tract is located?

A

Clarke’s nucleus (nucleus dorsalis) found in C8/T1- L3

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21
Q

Is Dorsal Spinocerebellar Tract crossed?

A

NO

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22
Q

Where does Dorsal Spinocerebellar Tract terminate? Via?

A

Cerebellum via Inferior cerebellar peduncle

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23
Q

At what level is Clarke’s nucleus found, and how does lower levels get to it?

A

Found at levels of C8-L3; L4 and lower will ride up Dorsal Column in Fasciculus gracilis to ‘find’ Clarke’s nucleus.

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24
Q

Does Dorsal Spinocerebellar Tract use Lissaure’s tract or ALS?

A

NO

25
Q

Is Dorsal Spinocerebellar Tract ipsilateral or contralateral?

A

Ipsilateral

26
Q

At what lamina is Clarke’s nucleus found?

A

Lamina 7

27
Q

What information does Ventral spinocerebellar tract convey?

A

Unconscious proprioception from trunk and lower extremities, transmits information from locomotor areas, monitor descending tracts (sensory fibers and interneuronal motor pools)

28
Q

1st neuron cell bodies of Ventral spinocerebellar tract ?

A

DRG

29
Q

Does Ventral spinocerebellar tract cross?

A

Yes; ventral white commissure and recrosses in cerebellum.

30
Q

Where does Ventral spinocerebellar tract terminate? Via?

A

Cerebellum via superior cerebellar peduncle

31
Q

Ventral spinocerebellar tract is _____, leaves in superior cerebellar peduncle. Once it gets to the white matter of cerebellum it goes to the other side, so where it ends up is _____.

A

Contralateral; ipsilateral

32
Q

What information is being conveyed by Cuneocerebellar Tract?

A

Unconscious proprioception from upper extremities

33
Q

1st order cell bodies of Cuneocerebellar Tract?

A

DRG

34
Q

2nd order cell bodies of Cuneocerebellar Tract?

A

Lateral/accessory cuneate nucleus

35
Q

Is Cuneocerebellar Tract crossed?

A

NO

36
Q

Where does Cuneocerebellar Tract terminate? Via?

A

Cerebellum via Inferior cerebellar peduncle

37
Q

Does Cuneocerebellar Tract use Lissaure’s tract?

A

NO

38
Q

Is Cuneocerebellar Tract ipsilateral or contralateral?

A

Ipsilateral

39
Q

What information is being conveyed by Spino-olivary tract?

A

Unconscious proprioception (terminates in cerebellum), works with cerebellum for motor learning and making corrections during movements.

40
Q

1st order cell bodies of Spino-olivary tract?

A

DRG

41
Q

2nd order cell bodies of Spino-olivary tract?

A

Spinal gray

42
Q

Does Spino-olivary tract cross? If so where?

A

Yes; ventral white commissure

43
Q

Where does Spino-olivary tract terminate?

A

Inferior olivary nucleus. (From there a axon will be going to cerebellum)

44
Q

What information is being conveyed by Spinoreticular tract?

A

Cutaneous information associated with alertness, consciousness and dull/ achy pain arouses cortex to stay alert and awake. Autonomic, behavioral and emotional responses to painful stimuli.

45
Q

1st order cell bodies of Spinoreticular tract?

A

DRG

46
Q

2nd order cell bodies of Spinoreticular tract?

A

Intermediate gray laminae

47
Q

Is Spinoreticular tract crossed? If so where?

A

Yes, majority; ventral white commissure

48
Q

Where does Spinoreticular tract terminate?

A

Pontine (contralaterally) and medullary (bilaterally) reticular formation. (From there it goes to the VPL)

49
Q

What information does Spinomesencephalic Tract convey?

A

Pain

50
Q

1st order cell bodies of 2nd order cell bodies of Spinomesencephalic tract?

A

DRG

51
Q

2nd order cell bodies of Spinomesencephalic tract?

A

Dorsal horn laminae

52
Q

Does Spinomesencephalic tract cross? If so where?

A

Yes; ventral white commissure

53
Q

Where does Spinomesencephalic tract terminate?

A

Midbrain: superior colliculus and periaqueductal gray.

54
Q

Spinomesencephalic tract termination: What is the function of Superior colliculus (Midbrain)?

A

Spinovisual relex response

55
Q

Spinomesencephalic tract termination: What is the function of periaqueductal gray (Midbrain)?

A

Provide descending feedback to dorsal horn via Reticular Fibers to modulate pain circuitry.

56
Q

Which 3 tracts uses cerebellar peduncle?

A

Cuneocerebellar, ventral spinocerebellar (sup), and dorsal spinocerebellar

57
Q

Which 2 tracts are not crossed?

A

Dorsal spinocerebellar and cuneocerebellar

58
Q

Which 2 (3) tracts uses ALS?

A

Spinoreticular, spinomesencephalic (spinotectal), and neo- and -paleo spinothalamic tract

Neuroanatomy (Final) (11 decks)

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