B2 Tracts Flashcards

1
Q

What is the one lateral sensory discriminative pathway?

A

Neospinothalamic pathway

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

What are the 3 functions of the neospinothalamic pathway (lateral sensory discriminative)

A
  1. Interpret pain
  2. Organised somatotopically to permit localisation
  3. Small receptive site = better localisation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the 6 steps of the neospinothalamic pathway (lateral sensory discriminative)?

A
  1. Nociceptors → 1st → 2nd → Brainstem
  2. VPL thalamus - crude pain
  3. Internal capsule posterior limb
  4. Corona radiata
  5. Primary somatosensory cortex
  6. Secondary somatosensory cortex - intrepret pain
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the 4 medial affective motivational pathways?

A
  1. Paleospinothalamic pathway
  2. Spinohypothalamic pathway
  3. Spinomesencephalic pathway
  4. Spinoreticular pathway
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the function of the paleospinothalamic pathway?

A

Dorsomedial & intralaminar nuclei project to cortical association areas & limbic ⇒ emotion & memory

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

What are the steps of the paleospinothalamic pathway?

A
  1. Nociceptors → 1st → 2nd → Brainstem
  2. Thalamus: Dorsomedial & intralaminar nuclei
  3. Amygdala, cingulate cortex, insula, hypothalamus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the function of the spinohypothalamic pathway?

A

Hypothalamus controls autonomic response to pain: e.g. HR, respiratory rate, sweat

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

What are the steps of the spinohypothalamic pathway?

A
  1. Nociceptors → 1st → 2nd → Brainstem
  2. Hypothalamus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the function of the Spinomesencephalic pathway? What are the 3 functions of the peraquaductal grey?

A

Periaqueductal gray:

  • Output to dorsal horn ⇒ modulation of pain
  • Superior colliculus: ⇒ reflex eye movements toward source of pain
  • Mesencephalic reticular formation – amygdala ⇒ emotional aspects of pain
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the steps of the spinomesencephalic pathway?

A
  1. Nociceptors → 1st → 2nd → Brainstem
  2. Periaqueductal gray
  3. Superior colliculus: output to tectospinal tract - look at where pain is
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the function of the spinoreticular pathway? What are the 3 functions of the reticular formation in brainstem?

A

Reticular formation in brainstem:

  • Output to dorsal horn ⇒ modulation of pain
  • Output to ventral horn ⇒ motor response to pain
  • Output to cortex, basal nuclei, cerebellum, thalamus, ⇒ arousal, attention to stimuli
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the steps of the spinoreticular pathway?

A
  1. Nociceptors → 1st → 2nd → Brainstem
  2. Reticular formation throughout brainstem
How well did you know this?
1
Not at all
2
3
4
5
Perfectly