Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Sem 2 Anatomy > Week 5 - Spinal cord > Flashcards

Week 5 - Spinal cord Flashcards

1
Q

Where is the spinal cord found?

A

Enclosed in the vertebral canal

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

How many spinal nerves per body segment?

A

One

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

What is a spinal cord segment?

A

A slice that gives one pair of spinal nerves

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

Where is the region that # of nerves differs from vertebrae?

A

The cervical spine - there are 8 cervical nerves and only 7 vertebrae. This is because the nerve coming out between the skull and the axis is called C1

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

Is the vertebral column or spinal cord longer?

A

Vertebral gets longer, though they’re equal orginally

The greater mismatch is at the lower segments

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

Where does the spinal cord end in adults?

A

At L1 - average is L1-L2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How do nerves exiting the spien account for vertebral column and spinal cord height difference?

A

Nerve exits remain fixed, so the lower nerve roots descend as a bunch
Cauda equina - tail

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

What are meninges?

A

The covering for the CNS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the Dura Mata?

A

A tough, thick layer that is a tube-like extension in the vertebral canal, for nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the arachnoid mata?

A

The spiderweb like, delicate layer within the dura mata. This ends at the lower sacral levels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the Pia mata?

A

Follows the surface of the brain very very closely

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is within the arachnoid?

A

Subarachnoid space. This contains only nerve roots + CSF below L1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the two roots of the spinal nerve?

A

Dorsal (sensory)
Ventral (Motor)
Each root has multiple rootlets

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where is the dorsal root ganglion?

A

Nearly the intervertebral foramen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Describe the two primary rami

A

Both are mixed nerves
One is dorsal
One is ventral
The anterior is much larger than the posterior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does the dorsal rami supply?

A

Posterior muscles of the vertebral column + band of overlying skin

17
Q

What do the thoracic ventral rami do?

A

These are intercostal nerves
T1 also contributes to brachial plexus
T12 is a subcostal nerve - no rib after rib 12

18
Q

What do the cervical ventral rami do?

A

C1-C4 are cervical plexus

C5-C8 are brachial plexus

19
Q

What do sacral and lumbar ventral rami do?

A

L2-S3 are the lumbar + sacral plexuses

20
Q

What are the venterolateral and dorsolateral sulci?

A

Where the rootlets attach to the spinal cord

21
Q

Where do you find the grey matter of the spinal cord?

A

In the middle - looks like an H.

There are ventral and dorsal horns, which reach ut towards their corresponding rootlets

22
Q

What divides white matter into three regions?

A

The H-shaped grey matter

23
Q

What are the three regions of white matter? What are their proper names?

A

There are three white funiculi:

Dorsal white funiculus, lateral … and ventral …

24
Q

Is gray matter uniform?

A

No, there are functionally distinct groups of neuron bodies, with indistinct boundaries

25
Q

What is in the ventral horn?

A

Neurons with motor function, arranged in groups

26
Q

What’s in the dorsal horn?

A

Neuron bodies with sensory function

27
Q

Where do you find autonomic neuron bodies?

A

In the intermediate (lateral) gray horn

28
Q

What do autonomic neuron bodies do?

A

Unconscious things

29
Q

What do you find in the gray matter aside from neuron bodies?

A

There are a high number of interneurons and glia

30
Q

Where are neurons for flexors?

A

These are more dorsal - opposite to body plan

31
Q

Where are neurons for extensors?

A

More ventral

32
Q

Where are neurons for proximal and distal muscles?

A

Proximal - medial

Distal - lateral

33
Q

Where are neurons for proximal and distal muscles?

A

Proximal - medial

Distal - lateral

34
Q

What are white matter tracts?

A

These are bundles of functionally similar fibres in the CNS. They’re either ascending or descending and can cross the spinal cord.
There can be overlap between neighbouring tracts

35
Q

Where is the origin of a white matter tract?

A

Where the specific neuron bodies are

36
Q

Where is the termination/destination of a white matter tract?

A

Where the axons end

37
Q

Where is the termination/destination of a white matter tract?

A

Where the axons end

38
Q

How are most tracts named?

A

By their origin and termination
AKA - a tract begins in cerebral cortex, terminates at all levels of the spinal cord and is in the lateral white funiculus of the spinal cord.
Therefore, it is the lateral corticospinal tract

Sem 2 Anatomy (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions