Concept I Meninges and Ventricles

Question 1

3 layers of meninges on spinal cord?

Answer 1

Pia mater (surface of spinal cord and roots of spinal nerves) 
Arachnoid mater (avascular)
Dura mater (tough, fibrous outer layer)

Question 2

What is the tubular sheeth that contains the spinal cord called?

Answer 2

Dural sac

Question 3

Where is extradural (epidural) space?

Answer 3

Between dura and vertebrae

Question 4

Where is subarachnoid space?

Answer 4

Under arachnoid layer

Question 5

What does the subarachnoid space hold?

Answer 5

Cerebral spinal fluid

Question 6

The dura mater and arachnoid mater directly touch. True or false?

Answer 6

True

Question 7

What are the tethers that the pia mater forms?

Answer 7

Denticulate ligaments

Question 8

What do denticulate ligaments do?

Answer 8

Help suspend spinal cord in Dural sac

Question 9

What is the definition of spina bifida?

Answer 9

Failure of fusion of one or more vertebral arch

Question 10

What are the two types of spina bifida?

Answer 10

Cystica

Occulta

Question 11

What is cystica?

Answer 11

Severe abnormality when 1 or more vertebral arches fail to develop and a cyst (of variable content) forms.

Question 12

What are two subtypes of cystica?

Answer 12

Meningocele

Myelomeningocele

Question 13

What is meningocele?

Answer 13

Herniation of meninges

Question 14

What is myelomeningocele?

Answer 14

Herniation of both meninges and spinal cord/ nerve roots

Question 15

What happens with occulta?

Answer 15

No cyst. Incomplete vertebral arch. Usually L5 or S1 fail to form. Tuft of hair.

Question 16

Which layer of mater tethers the spinal cord?

Answer 16

Pia mater

Question 17

What area of spinal cord contains CSF?

Answer 17

Subarachnoid space

Question 18

Which area of spinal cord contains fat?

Answer 18

Epidural or extradural

Question 19

What pia mater suspends the spinal cord in Dural sac?

Answer 19

Denticulate ligaments

Question 20

Which two mater is right up against each other to form dura?

Answer 20

Arachnoid mater and dura mater

Question 21

Which two layers make up the cranial dura mater?

Answer 21

Periosteal layer

Meningeal layer

Question 22

What is Falx cerebri, Falx cerebellum and tentorium cerebri made up of?

Answer 22

Dura mater

Question 23

What are the areas between periosteal layer and meningeal layer called?

Answer 23

Dural venous sinuses

Question 24

What are Dural venous sinuses lined with?

Answer 24

Endothelium

Simple squamous epithelium

Question 25

Which opening doors the blood from brain drain into?

Answer 25

Jugular Foramen

Question 26

What elastic and collagen fibres anchor pia mater to arachnoid mater?

Answer 26

Arachnoid trabeculae

Question 27

Vascular structures that protrude from subarachnoid space into the Dural venous sinuses.

Answer 27

Arachnoid villus/villi

Question 28

Which ventricle is continuous with central canal of spinal cord?

Answer 28

4th

Question 29

What are the names of the structures attached to 4th ventricle?

Answer 29

Lateral aperture | Median aperture

Question 30

Flow of CSF summary

Answer 30

``` Lateral ventricles Third ventricles Cerebral aqueduct Fourth ventricle Apertures Subarachnoid space Resorbed into blood within dural very sinus ```