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ADELE-Noodles of Neurology > Pathways > Flashcards

Pathways Flashcards

1
Q

What are the three ascending pathways?

A

DCML
Spinothalamic tract
Spinocerebellar pathway

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2
Q

What are the 3 functions of the DCML?

A

Fine touch
Proprioception
Vibration

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3
Q

What does DCML stand for?

A

Dorsal column-medial lemniscus

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4
Q

Where does the DCML desiccate?

A

Medulla

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5
Q

What are the two components of the DCML?

A

Nucleus cuneatus

Nucleus Gracillis

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6
Q

To which somatosensory cortex is the information transmitted to?

A

CONTRALATERAL

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7
Q

Function of the spinothalamic tract

A

Lateral- Pain and temperature

Anterior- Crude touch

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8
Q

Where do the two conscious ascending pathways of the brain enter the spinal cord?

A

The posterior root ganglia

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9
Q

Where does the spinothalmaic tract cross over?

A

1 or 2 spinal segments above through tract of lissauer to synapse in the dorsal horn

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10
Q

At what level does the spinothalamic tract dessucate?

A

Spinal level

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11
Q

Which somatosensory cortex is the information in the spinothalamic tract transmitted to?

A

Contralateral

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12
Q

What is the name of the pathways that carries unconscious proprioceptive information to the cerebellum

A

Spinocerebellar pathways

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13
Q

What two things does the spinocerebellar pathway coordinate?

A

Movement and posture

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14
Q

What are the 3 types of spinocerebellar pathway

A

Dorsal/posterior spinocerebellar
Cuneocerebellar
Ventral/Anterior spinocerebellar

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15
Q

Where does the dorsal/posterior spinocerebellar tract carry information from?

A

the lower limbs

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16
Q

Where does the dorsal/posterior spinocerebellar tract synapse?

A

dorsal nucleus of Clarke

17
Q

Where does the cuneocerebellar carry unconscious proprioceptive information from

A

The upper limbs

18
Q

Where does the ventral/anterior spinocerebellar pathways carry unconscious proprioceptive information from?

A

The lower limbs (Golgi tendon organs mainly)

19
Q

The spinocerebellar pathway transmits information to which somatosensory cortex?

A

Ipsilateral

20
Q

Conscious pathways have a —– neuron chain?

A

3

21
Q

What are the names of the two pyramidal descending pathways?

A

Corticospinal

Corticobulbar

22
Q

Corticospinal conveys voluntary skilled movements from the cortices to the ——– of the medulla

A

pyramids

23
Q

85% of the fibres of the corticospinal tract cross in the medulla and form the ——-

A

lateral CST

24
Q

What does the lateral CST carry?

A

Motor information for limb

25
Q

Uncrossed fibres of the corticospinal tract form the ——-

A

Ventral CST

26
Q

What does the ventral CST carry?

A

Motor information for central

27
Q

If there is a CVA of the internal capsule there will be a lack of descending controls of the corticospinal tract. What does this clinically look like?

A

Spastic paralysis and hyperflexion of the upper limbs (Decorticate posturing)

28
Q

TRUE/FALSE Corticobulbar provides motor to the CN that supply the face

A

TRUE

29
Q

What are the CN that supply the face?

A

V,VII,X,XII

30
Q

Most inputs from the corticobulbar are bilateral. Which two nerves are innervated contraleterally only?

A

Lower facial nerve

Hypoglossal nerve

31
Q

UMN lesions affecting facial nerve clinically looks like…

A

paralysis to lower side of one half of the face ONLY and forehead unaffected (central facial palsy)

32
Q

A LMN lesion affecting the face clinically looks like… and is called

A

Paralysis of the ipsilateral one-half of the face inc forehead (Bells palsy)

33
Q

What are the 4 extrapyramidal tracts called?

A

Rubrospinal
Vestibulospinal
Rectospinal
Tecto-spinal tracts

34
Q

Where do Rubrospinal tract originate?

A

Red nucleus

35
Q

What is the rubrospinal tract responsible for

A

limb flexors (and inhibit extensors)

36
Q

What do the fibres in the vestibulospinal tract control?

A

Balance and posture by innervating anti-gravity muscles

37
Q

Where does the tectonic-spinal tract originate?

A

Superior colliculus

38
Q

If there is a lesion above the midbrain which of the extrapyramidal tracts will be working

A

rubrospinal

reticulospinal

ADELE-Noodles of Neurology (38 decks)

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