Spinal Cord

Question 1

Name the 4 regions of Vertebrae (top to bottom)

Answer 1

1. Cervical
2. Thoracic
3. Lumbar
4. Sacrum & coccyx

Question 2

How many pairs of spinal nerves?

Answer 2

31 pairs (motor and sensory)

Question 3

What’s the structure formed by the lumbar and sacral nerves called

Answer 3

Cauda equina

Question 4

What connects the lateral V to the Third V

Answer 4

Small opening called the

-interventricular foramen

Question 5

What connects the third ventricle to the fourth

Answer 5

Cerebral aqueduct

Question 6

How does CSF enter the spinal cord

Answer 6

Spinal canal

Question 7

Total volume of CSF

Total vol produced each day

Answer 7

1. 150ml at any given time

2. 550ml produced each day

Question 8

Where is Chloriod plexus found

Answer 8

Each of the ventricles

NOT in

• cerebral aqueduct
• anterior/ posterior horn of lateral ventricle

Question 9

How is CSF produced

Answer 9

Cells actively transport Na+ and ions into ventricles
-
Water follows osmotic gradient

Question 10

Where is CSF reabsorbed

Answer 10

• From subarachnoid space
• through arachnoid villi
• into superior Sagitta sinus

Question 11

What’s communicating Hydrocephalus

Answer 11

CSF cannot be reabsorbed at the arachnoid villi

Question 12

What’s non-communicating Hydrocephalus

Answer 12

An obstruction means CSF cannot leave the ventricles

Question 13

Clinical importance of CSF

Answer 13

Lumbar puncture allows sample of internal environment of CNS