Neuro Tracts Flashcards

1
Q

What is another name for the anterolateral system ?

A

Spinothalamic tract

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2
Q

What is another name for the medial lemniscial tract?

A

Dorsal column

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3
Q

What does the medial lemniscial tract transmit?

A

Fine touch, proprioception, vibration, and pressure

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4
Q

What is the corticospinal tract?

A

Transmits motor impulses

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5
Q

What is the Lissauer tract?

A

Intermediary pathway that relays sensory input in the spinal cord

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6
Q

What is gray matter? how many subdivisions? How are they broken down?

A

10

1-6 are sensory

7-9 are motor

10 is a crossover area

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7
Q

Where do sensory neurons enter through?

A

Dorsal root

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8
Q

Where do motor neurons exit through?

A

Ventral root

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9
Q

What is the dorsal system? Another name?

A

Medial lemniscal system

Transmits mechanoreceptive sensations

Touch, vibration, proprioception, and pressure

Two point discrimination

Large, myelinated

More advanced

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10
Q

Where does the dorsal system crossover?

A

Second order neuron in the medulla

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11
Q
A
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12
Q

What do Meissner’s corpuscles do?

A

Two point discrimination and vibration

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13
Q

What do Pacinian corpuscles do?

A

Vibration

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14
Q

What do Merkel’s discs do?

A

Continuous touch

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15
Q

What do Ruffini’s endings do?

A

Proprioception and prolonged touch and pressure

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16
Q

What is the anterolateral system ? Another name?

A

Spinothalamic tract

Sensory

Pain, crude touch, tickle, itch, sex

Small, slow conducting fibers

No two point

17
Q

What is the corticospinal tract do?

A

Motor pathway

18
Q

What do SSEPs monitor?

A

Dorsal column (Posterior arteries)

19
Q

What do MEPs monitor?

A

Corticospinal tract (Anterior artery)

20
Q

Which pathway is the tract of Lissauer apart of?

A

Spinothalamic tract

21
Q

Which mechanoreceptor allows blind people to read brail?

A

Meissner’s corpuscles (two point)

22
Q

What tract are mechanoreceptors apart of?

23
Q

What tract transmits pain?

A

Spinothalamic

24
Q

Primary treatment for neurogenic shock?

A

Intravascular expansion with norepinephrine

Norepi

remove stimulus?

25
What is preserved if the anterior spinal artery is clamped?
Touch and proprioception
26
What tract is perfused by anterior blood supply?
Corticospinal tract and Autonomic and Spinothalamic
27
What tract is perfused by posterior supply?
Dorsal column
28
What tract does Babinski test for?
Corticospinal