Spinal Cord and Meninges Flashcards

1
Q

Where do spinal nerves pass out of the Vertebral Canal?

A

Intervertebral Foramina (formed by Superior and Inferior Vertebral Notches on Adjacent Vertebrae)

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

How many cervical vertebrae/spinal nerves

A

7 Cervical Vertebrae

8 Pairs Spinal Nerves

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

How many thoracic vertebrae/spinal nerves

A

12 Thoracic Vertebrae

12 Pairs Thoracic Spinal Nerves

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

How many Lumbar vertebrae/spinal nerves

A

5 Lumbar Vertebrae

5 Pairs Lumbar Spinal Nerves

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

How many Sacral vertebrae/spinal nerves

A

5 Sacral Vertebrae

5 Pairs Sacral Spinal Nerves

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

How many Coccygeal vertebrae/spinal nerves

A

1 Coccygeal bone (multiple fused)

1 Nerve

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

Where do C1-C7 spinal nerves pass out?

A

Above their corresponding vertebrae

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

Where does C8 spinal nerve pass out?

A

Below C7 Vertebrae

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

Where do T1 and below Spinal nerves pass out?

A

Below their corresponding vertebrae

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

What is the Cervical Enlargement

A

Enlargement of the VGH as motor fibres to Brachial Plexus arise

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

What is the Lumbar/Sacral Enlargement

A

Enlarged VGH as motor fibres to the Lumbosacral plexus arise

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

Conus Medullaris

A

Tapered end of the SC within the SC

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

Level of Conus Medullaris in adults

A

L1-L2

Due to SC regression during growth

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

Level of Conus Medullaris in neonates

A

L3-L4

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

Filum Terminale

A

Modification of Pia Mater from Conus Medullaris to Co1

Gives Longitudinal support to SC

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

Approximate length of Filum Terminale

17
Q

Lumbar Cistern

A

Enlargement of Subarachnoid Space beneath level of the CM

18
Q

Contents of the Lumbar Cistern

A

CSF
Filum Terminale
Cauda Equina

19
Q

Clinical significance of Lumbar Cistern

A

Site of Lumbar Puncture (L4-L5) as less chance of damaging nerves

Surface landmark: Posterior Iliac Crest

20
Q

Cauda Equina

A

Bundle of nerves associated with vertebrae below level of CM. Nerves descend in bundle to appropriate IVF

21
Q

Sx of Cauda Equina Syndrome

A

Micturition Difficulties
Loss of Anal Sphincter Tone (Incontinence)
Saddle Anaesthesia
Lower Back/Leg Pain

22
Q

Blood Supply to the Spinal Cord

A

2 Posterior Spinal As
1 Anterior Spinal As
8-10 Segmental Medullary As/Radicular As (arising from Posterior Intercostal As)

23
Q

Venous Drainage of SC

A

Anterior/Posterior Spinal Veins

Drain into Internal Vertebral Plexus in Epidural Fat

Drains into large systemic veins and Azygous system

24
Q

At which levels is the Lateral Grey Horn present, and why?

A

T1-L2
S2-S4

Sympathetic chain/splanchnic nerves arise at these levels

25
Dura mater in the SC?
Only one layer (meningeal) Periosteal layer reflects and adheres to external bone of skull
26
Denticulate Ligaments
Modifications of Pia mater that project to lateral walls of Vertebral Canal Stabilise the SC
27
Types of fibres in Dorsal Root
Sensory (somatic and visceral) Cell bodies in DRG
28
Types of fibres in Ventral Root
Somatic Motor Visceral Motor (separate to one another. Cell body in VGH)
29
Superior and Inferior limits of Epidural/Extradural Space?
Foramen Magnum Sacrococcygeal Membrane @ tip of sacrum
30
Superior and Inferior limits of Subarachnoid Space?
Cerebral Cortex S2