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Year 1- Anatomy > Spinal Cord and Meninges > Flashcards

Spinal Cord and Meninges Flashcards

1
Q

what nervous sytem is the spinal cord part of?

A

CNS

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2
Q

What is the spinal cord?

A

Major reflex centre and conduction pathway between the body and the brain.

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3
Q

Where does the spinal cord begin and extend to?

A

Medulla oblongata and extends to the L1/L2 vertebral level.

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4
Q

How many pairs of nerves exit from the spinal nerves?

A

31 pairs

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5
Q

Where are the two enlargemnts of the spinal cord?

A

Cervical and lumbar enlargemnt

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6
Q

Why are some parts enlarged?

A

More nervous tissue as supply muscles.

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7
Q

In the fetus, what length is the spinal cord.

A

Almost equal to the length of of the vertebral canal.

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8
Q

What is the conus medullarise?

A

Conical inferior end of the spinal cord.
At the lvevel of L1 and L2

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9
Q

What is the cauda equina?

A

Bundle of spinal nerve root and resembles a horse tail.

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10
Q

What is the filum terminale?

A

Continuation of pia mater (internum).

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11
Q

What is the dural cistern?

A

Dilated Dural sac, ends at S2 vertebral level.

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12
Q

What shape is the grey matter and what is found here?

A

H shaped and contains cell bodies.

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13
Q

What is found in the white matter?

A

Axons

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14
Q

What are the nissl bodies?

A

Rough eendoplasmic reticulum in the cell bodies.

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15
Q

Which is inner and outer of the grey and white matter?

A

Grey matter H sahped and surrounded by the white matter.

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16
Q

How do spinal nerves exit the vertebral canal?

A

Through the interveretbral foramen.

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17
Q

How are the spinal nerves pairs paired?

A

In a segmental fashion

18
Q

Which areWhat does ventral rami form?

A

Nerve plexuses

19
Q

What do nerve plexuses do?

A

suplly limbs w nerves

20
Q

Which areas of the body does the nerves plexuses supply?

A

Brachial Plexus to upper limb
Lumbosacral plate to lower limbs

21
Q

What kind of nerves come from the dorsal root?

A

SEnsory neruons

22
Q

Which kind of nerve comes from the vetral root?

A

Motor neurons

23
Q

Which kind of spinal nerves come from the spinal nerve?

A

Mixed neurons- both motor and sensory

24
Q

Which kind of spinal nerves come from the dorsal rami?

A

Mixed

25
Q

Which kind of nerves come from the ventral rami?

A

Mixed

26
Q

What are meninges?

A

Coverings of the brain and spinal cord.

27
Q

Find some differnces between dura, arachnoid and pia matter pls
Thinkpia mater is more delicate

A
28
Q

Where in cerebrospinal fluid found?

A

Between the arachnoid and pia mater,

29
Q

Discuss the position of the dural sac.

A

Terminates at S2 vertebral level and attaches tp the tip of the coccyx y filum terminale externum.

30
Q

in the grey matter, where are the cell bodies found?

A

In the lateral horn of the grey amtter.

31
Q

Where is the thoracolumbar outflow of sympathetic outflow of sympathetic nervous system?

A

T1-L2 segment.

32
Q

What is the craniosacral outflow?

A

The neurons of the parasympatheticnervoussystem leaves the central nervous system with third, seventh, ninth and tenth cranial nerves and second and third sacral nerves. This branch is also called craniosacral outflow.

33
Q

where does the cranial outflow come from?

A

The brain

34
Q

Where does the sacral outflow come from?

A

Pelvix splanchnic nerve (S2-S4).

35
Q

What can deficiency of blood vessels to the spinal cord lead to?

A

Ischemia and muscle weakness and paralysis.

36
Q

What is venous drainage?

A

Internal vertebral venous plexuses.
Drains to the cerebral dural venous sinuses.

37
Q

NEED TO LOOK ATT SPACES AROUND TH VENOUS PLEXES IDKKK HELP

A
38
Q

How cancer and infection spread to regions of the body involving the spinal nerve?

A
39
Q

Where does epidural anesthesia go?

A

Epidural space

40
Q

What is a lumbar puncture used for?

A

Collection fo cebrospinal fluid

41
Q

Where can the lumbar puncture take place?

A

L3-L4 or L4-L5, in subachnoid space

Year 1- Anatomy (30 decks)

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