Spinal cord and spinal nerves Flashcards Preview

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Flashcards in Spinal cord and spinal nerves Deck (17)
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1

Where do spinal nerves exit their numbered vertebrae?

C1-C7 = cervical spinal n exit ABOVE their vertebrae
Below T1 = spinal n exit BELOW their vertebrae

2

What do grey matter and white matter contain?

Grey - cell bodies
White - axons of neurons

3

What type of neurons are present in the dorsal, lateral and ventral horns?

Dorsal - sensory
Lateral - autonomic
Ventral - Motor

4

What is the blood supply of the spinal cord?

1 x Anterior and 2 x posterior spinal arteries
Arise from vertebral arteries

5

What would happen if the segmental arteries (arising from the vertebral a.) supplying the inferior part of the spinal cord is blocked?

Result in ischaemic damage to the spinal cord

6

Where do spinal nerves emerge from the vertebrae?

Via the intervertebral canal

7

What type of nerves do spinal nerves contain?

Mixed nerves

8

What is the venous drainage of the spinal cord?

Vertebral venous plexus - Valveless veins form a rich plexus around the spinal cord and within the epidural space -> pass into cranium and vertebral bodies

9

What pathology can happen as a result of the vertebral venous plexuses communicating with the pelvic veins?

Form a route for cancer spread (e.g. prostate) into the vertebral bodies

10

What could occur if the posterior ramus was compressed/injury?

Cause localised back pain

11

What is the common level of adult spinal cord termination?

L1

12

What is the common level of end of subarachnoid space?

Lower S1-S2

13

If the L4-L5 disc prolapses, what spinal nerve does it affect?

L5 spinal nerve

14

How is a lumbar puncture carried out?

VC is flexes to open up space between adjacent spinous process (patient - lying/sitting, knees up to chest)
Midline needle insertion - penetrate skin, supra/infra spinous lig. and ligamentum flavum

15

What levels is spinal anaesthesia prerformed?

Between L3-L4 to L5-S1 space

16

Where is the sacral hiatus located?

Inferior apex of an equilateral triangle measure between the post. sup. iliac spines

17

In a caudal epidural, how is the needle introduced?

The needle is introduced at an oblique angle, then directed cephalad and advanced