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Flashcards in Meninges and CSF Deck (49)
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1

Meninges (describe)

Comprise three connective tissue membranes that invest the spinal cord and brain, which are the pia mater, the arachnoid, and the dura mater

2

Pia mater (describe)

a delicate, vascular layer of connective tissue

3

Pia mater (structure)

covers the surface of the brain and spinal cord, connected to the arachnoid by arachnoid trabeculae

4

Denticulate ligaments (describe)

two lateral flattened bands of pial tissue, adhre to the spinal dura mater with 21 pair of attachments

5

Filum terminale (describe)

extension of the pia mater

6

Arachnoid (structure)

delicate, nonvascular connective tissue membrane between the dura and the pia mater and has the arachnoid villi

7

Dura mater (structure)

outer layer of the meninges, consisting of dense connective tssue, divided into periosteal layer and a meningeal layer

8

Meningeal spaces (structure)

spinal epidural space, cranial epidural space, subdural space, subarachnoid space, subarachnoid cisterns

9

Spinal epidural space (location)

located between the spinal dura mater and the vertebral periosteum

10

Spinal epidural space (function)

can be injected with a local anesthetic to produce a paravertebral nerve block

11

Cranial epidural space (describe)

contains the meningeal arteries and veins

12

Subdural space (function)

intracranially transmits cerebral ceins to the venous lacunae of the superior sugittal sinus

13

Subarachnoid space (location)

located between the pia mater and the arachnoid

14

Subarachnoid space (function)

contains CSF

15

Subarachnoid cisterns (function)

dilations of the subarachnoid space, which contain CSF

16

Brain ventricles (describe)

lateral ventricles, third ventricles, cerebral aqueduct, fourth ventricle

17

Subarachnoid cisterns (describe)

Cerebellopontine angle cistern, cerebellomedullary cistern, Ambient cistern, superior cistern

18

Cerebellopontine angle cistern (function)

Receives CSF from the fourth venticle via the lateral foramina

19

Cerebellomedullary cistern (describe)

Located in the midline between the cerebellum and the medulla

20

Cerebellomedullary cistern (function)

Receives CSF from the fourth ventricle via the median foramen and can be tapped for CSF

21

Ambient cistern (function)

Interconnects the superior and interpeduncular cistern

22

Ambient cistern (describe)

Contains the trochlear nerve CN IV

23

Superior cistern (describe)

Overlies the midbrain tectum

24

Ventricles (describe)

Lined with ependyma and contain CSF, contain choroid plexus. Lateral ventricles, third ventricle, cerebral aqueduct, fourth ventricle

25

Choroid plexus (function)

Produces CSF at a rate of 500 to 700 ml/day, communicate with the subarachnoid space via three foramina in the fourth ventricle

26

Lateral ventricles (functions)

Communicate with the third ventricle via the interventicular foramina

27

Lateral ventricles (describe)

Two ventricles are located within the cerebral hemispheres. Frontal horn, body, temporal horn, occipital horn, trigone

28

Frontal horn (describe)

located in the frontal lobe. Its lateral wall is formed by the head of the caudate nucleus. Lacks choroid plexus

29

Lateral body (describe)

located in the medial portion of the frontal and parietal lobes. Contains choroid plexus

30

Lateral body (function)

Communicates with the third ventricle via the interventricular foramina