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Paper 1 > Anatomy Of Ascending Tracts > Flashcards

Anatomy Of Ascending Tracts Flashcards

1
Q

1) Lateral spinothalamic trad.
Function

A

conscious Ascending tracts (pain, Temp.) from the body and face

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2
Q

Fast Pain Lamina representation of the body

A

148
Lamina I, IV VIII pyrimidal

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3
Q

slow pain of the body Lamina respresentation

A

Laming 2 substantia gelatinose of Rolandi

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4
Q

which short Tract connected to pain tract

A

Lissaure’s short tract

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5
Q

2nd order neuron of fast pain on the body

A

Laminated:
Cervical most medial
Sacral most Lateral.

Deccussate to opposite side at Level of spinal Cord.

end on VPLN of Thalamus.

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6
Q

2nd order neuron of slow pain on the body

A

After Decussation

Ascend in spinoreticular tract in brainstem make collaterals with Reticular formation

Relay on interlaminar nucleus of Thalamus

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7
Q

3rd order neuron of slow pain on body ( dull , Affective)

A

inter laminar nucleus to Ant. part of cingulate gyrus. (Limbic system)

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8
Q

3rd order neuron of Fast pain on body (Discrimitative)

A

VPLN. To post central gyrus (sensory area).

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9
Q

(pain_Temp) from face
1st order neuron on

A

Trigeminal ganglia (pseudo unipolar cells of DRG)

Periphal process (opthalamic, Maxillary
Central process
Spinal nucleus of TG

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10
Q

2nd order neuron of face pain

A

from Spinal nucleus of TG to
End in VPMN of thalamus
Decussate opposite side of spinal cord.

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11
Q

3rd order neuron of face pain

A

From VPMN to Lower part of postcentral gyrus.

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12
Q

2) Ventral Spino thalamic tract

A

Conscious crude touch and pressure sensations

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13
Q

Relay lamina of 1st order neuron of crude touch

A

nucleus propius
47

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14
Q

2nd order neuron of crude touch

A

Decussate→ Ascend→ join Medial Leminiscal → End VPLN of thalamus

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15
Q

importance of spino reticular tract

A

a route for dull, aching, affective pain

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16
Q

End of spino tectal Tract.
Importance

A

Superior colliculli of midbrain
For : Spino visual reflexes Head trun toward light Source.

17
Q

3) Medial leminiscal
Doral column tract

A

Carry
Fine touch- deep pressure.
- vibration - proprioception

18
Q

position in Spinal cord

A

occupy dorsal white column

19
Q

Lamination

A

cervical most Lateral
sacral most Medial

20
Q

Conscious proprioception and fine touch of upper body above T6

A

Cuneo Cerebellartract from accessory cuneate nucleus Laterally

21
Q

Nucleus for Conscious proprioception of Lower part of the body

A

through Gracille nucleus Medially

22
Q

Level of decussation

A

gracillie and cuneate faciulus of Medulla

23
Q

1st order neuron of DCT

A

DRG → Gracille+ Cuneate of Medulla.

24
Q

2nd order neuron of DCT.

A

across to Median plan→ ascend→ VPLN of thamus

25
Q

speto marginal / comma shaped tract formation

A

1st order neuron of dorsal column tract through ascending to Medulla,→ it sends collateral branches to end in dorsal horn of spinal cord. which Forms these 2 short tracts.

26
Q

internal arcuate Fibers formation

A

By cunate nucleus
while 2nd order neuron in Medulla cross to Median plane it Forms These Fibers.

27
Q

4) Ventral spinocerebellar tract

A

unconscious proprioception
(Movement and position) of lower limbs
Lamina 5, 6, 7 in lumbar and sacral segments

28
Q

Ventral spinocerebellar tract make double crossing

A

1st order end on lamina 5, 6, 7 → decussate at level of spinal cord → Ascend → Cross again to reach ipsilateral cerebellum through SCP

29
Q

5) Dorsal spinocerebellar sensation

A

unconscious proprioception
(Movement and position) from lower limbs and trunk

30
Q

Dorsal spinocerebellar is ipsilateral (uncrossed)tract?

A

DRG → ipsilateral clarke nucleus C8 : L3 →
Ascend ipsilateral. → reach ipsilateral cerebellum via ICP inf. cerebellar peduncle

31
Q

which sensation spino.olivary Tract carry?

A

upper and Lower limb
sub conscious proprioception.

32
Q

spino-olivary tract make double crossing?

A

Cross junction between Lateral, ventral colum→→ Contralateral olivary nuclelus →→Fibers reach ipsilateral cerebellum via ICP.

33
Q

White column Classification of Ascending tracts

A

1/ Anterior Column:
Ant. Spinothalamic

2/ Posterior column:
Dorsal column tracts

3/ Lateral Column:
• to cerebellum
Ant. spino-Cerebellar.
Post spino-Cerebellar (uncrossed)

• Brain stem
Spine tectal.
spino-olivary.
Spino-Reticular.

34
Q

White column Classification of Ascending tracts

A

1 Anterior Column:
Ant. Spinothalamic

2 Posterior column:
Dorsal column tracts

3 Lateral Column:

Ant. spino-Cerebellar.
Post spino-Cerebellar (uncrossed)

To Brain Stem nuclei
Spine tectal
spino-olivary.
Spino-Reticular.

Paper 1 (18 decks)

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