Meninges

Question 1

meninges

Answer 1

The meninges are three layers of membranes that cover and protect the brain and spinal cord, which make up your central nervous system (CNS)

Question 2

where they are found ( meninges)

Answer 2

1. Between skull and brain
2. Between vertebral foramen and spinal cord

Question 3

The layers of meninges

Answer 3

• The dura mater
• The arachnoid mater
• The pia mater

Question 3

Whats the difference between the cranial dura mater and the spinal dura mater

Answer 3

• The cranial dura mater has 2 layers while the spinal dura mater has 1 layer.

Question 4

The dura mater

Answer 4

• Outer most layer of the meninges
• It is a tough, fibrous layer composed of dense connective tissue.
• Has 2 layers, periosteal layer (outer layer) and the meningeal layer (inner layer)
• Has dural folds Examples include the falx cerebri, tentorium cerebelli, and falx cerebelli.

Question 5

The arachnoid mater

Answer 5

• The middle layer of the meninges
• Avascular (lacks its own blood supply)
• Lines the inner surface of the dura mater and extends down the vertebral and to the level of 2nd sacral vertebral.
• Contains CSF in subarachnoid space

Question 6

Subarachnoid space

Answer 6

The space between the arachnoid mater and the pia mater is called the subarachnoid space, filled with cerebrospinal fluid (CSF).

Question 7

Pia mater

Answer 7

• The inner layer of the meninges
• It is a delicate, thin layer that closely adheres to the surface of the brain and spinal cord, following all its convolutions.

Question 8

epidural space

Answer 8

• Area between the dura mater and the inner surface of the vertebral canal.

It’s filled with fat, blood vessels, and connective tissue.

Question 9

What separates the arachnoid mater from the dura mater.

Answer 9

• A narrow space called the subdural membrane

Question 10

Filum terminale

Answer 10

• A thin fibrous strand of tissue that extends from the end of spinal cord to the coccyx.

Question 11

Conus medullaris

Answer 11

• Tapered lower end of the spinal cord,
• Typically ends around L1 and L2 below this the spinal cord continues as bundle of nerves called the cauda equina

Question 12

How different is the pia mater that covers the brain from that that covers the spinal cord.

Answer 12

• Pia mater covering the brain is less vascular and less thick than the pia mater which covers the spinal cord

Question 13

foramen of monro

Answer 13

The foramen of Monro, also known as the interventricular foramen, is a small opening in the brain that connects the lateral ventricles to the third ventricle

Question 14

function of the foramen of monro

Answer 14

Its primary function is to allow the cerebrospinal fluid (CSF) to flow from the lateral ventricles, where it is produced, to the third ventricle and then into the rest of the ventricular system