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Neuro > Ascending and Descending tracts > Flashcards

Ascending and Descending tracts Flashcards

1
Q

What are the ascending tracts of the spinal cord?

A

The anterolateral pathways

The posterior column-medial lemniscal pathway

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2
Q

Where does the anterolateral pathway decussate?

A

In the spinal cord

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3
Q

Where does the posterior column-medial lemniscal pathway decussate?

A

In the medulla

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4
Q

What are the 3 tracts of the anterolateral pathways?

A
  1. Spinothalamic
  2. Spinoreticular
  3. Spinomesencephalic
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5
Q

Where does the Spinothalamic tract transmit to?

A

The thalamus

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6
Q

Where does the Spinoreticular tract transmit to?

A

The reticular formation of the brainstem

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7
Q

Where does the Spinomesencephalic tract transmit to?

A

The periaqueductal grey matter and superior colliculi in the midbrain

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8
Q

What does the Spinoreticular tract convey?

A

Emotional and arousal aspect of pain

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9
Q

What does the Spinomesencephaic tract convey?

A

The central modulation of pain

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10
Q

What are the systems of the descending pathways of the spinal cord?

A
  1. The Lateral Motor System

2. The Medial Motor System

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11
Q

What are the tracts of the Lateral Motor Systems?

A
  1. The Lateral Corticospinal Tract

2. The Rubrospinal Tract

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12
Q

What is the Lateral Corticospinal Tract responsible for?

A

Controlling movement of the upper and lower extremities

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13
Q

Where does the Lateral Corticospinal Tract decussate?

A

In the spinal cord

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14
Q

What is the Rubrospinal Tract responsible for?

A

Facilitating flexor muscle activity and inhibiting extensor muscle activity of the upper limbs

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15
Q

Where does the Rubrospinal Tract decussate?

A

In the midbrain

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16
Q

What are the tracts of the Medial Motor Systems?

A
  1. Anterior Corticospinal Tract
  2. Tectospinal Tract
  3. Vestibulospinal Tract
  4. Reticulospinal Tract
17
Q

What is the Anterior Corticospinal Tract responsible for?

A

Control of bilateral axial and girdle muscles

18
Q

What is the Vestibulospinal Tract responsible for?

A

Medial VST: Positioning of the head and neck

Lateral VT: Balance

19
Q

What is the Reticulospinal Tract responsible for?

A

Automatic posture and gait-related movements

20
Q

What is the Tectospinal Tract responsible for?

A

Coordination of the head and eye movements

21
Q

Where are the descending tracts of the brainstem located?

A

The inferior part of the midbrain

22
Q

What are the descending pathways of the brain stem?

A
  1. Corticospinal tract
  2. Corticonuclear/corticobulbar tract
  3. Corticopontine tract
23
Q

What is the function of the corticonuclear/corticobulbar tract?

A

To transmit nerve signals from the brain to the cranial nerves

24
Q

What is the function of the corticospinal tract?

A

To transmit nerve signals from the brain to the spinal cord

25
Q

What is the function of the corticopontine tract?

A

Communicaton and coordination between the hemispheres of the cerebellum

26
Q

Where is the nucleus for the oculomotor nerve located?

A

In the midbrain

27
Q

Where is the nucleus for the Trochlear nerve located?

A

In the midbrain

28
Q

Where is the motor nucleus for the Trigeminal nerve located?

A

In the pons

29
Q

Where is the motor nucleus for the Abducens nerve located?

A

In the pons

30
Q

Where is the motor nucleus for the Facial nerve?

A

In the pons

31
Q

Where is the motor nucleus for the Hypoglossal nerve located?

A

In the medulla

32
Q

Where is the nucleus ambiguus located?

A

In the medulla

33
Q

Where is the primary sensory nucleus for the Trigeminal nerve located?

A

In the pons

34
Q

Where is the spinal sensory nucleus of the Trigeminal nerve located?

A

In the medulla

35
Q

Where is the nucleus of the solitary tract located?

A

In the medulla

36
Q

Where are the choclear nuclei located?

A

In the pontine junction

37
Q

Where are the vestibular nuclei located?

A

In the pontine junction

Neuro (1 decks)

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