Brain and Meninges Flashcards Preview

Head and Neck Anatomy > Brain and Meninges > Flashcards

Flashcards in Brain and Meninges Deck (16)
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1

SCALP

skin
connective tissue (dense)
aponeurotic layer
loose areolar tissue
periosteum

2

Connective tissue has...

blood vessels and nervous tissue

3

Dura mater

tough, outer covering of the brain

4

periosteal layer

firmly attached to the skull

5

meningeal layer

in close contact with the arachnoid mater

6

arachnoid mater

thin, avascular membrane, enters the longitudinal fissure (between cerebral hemispheres)

7

pia mater

(faithful) thin, delicate membrane, closely invests surface of the brain and roots of the cranial nerves.

8

Trabeculae

Tissue material that extends downward and becomes continuous with the pia mater.

9

Arachnoid granulations

small projections of arachnoid mater through the dura mater, CSF drainage.

10

Meningitis

Infection of the leptomeninges (pia mater and arachnoid mater). It is usually viral, but there is also bacterial and fungal. Viral is less harmful.

11

Symptoms of meningitis

headache, fever, drowsiness, nausea, stiff neck; later photophobia, ecchymosis (rash), seizures

12

Subarachnoid space

between arachnoid and pia, the only normally occuring space associated with the meninges. Contains CSF and blood vessels.

13

Extradural (epidural) space

Potential space between periosteal layer of dura mater and skull.

14

Subdural space

POTENTIAL space between meningeal layer of dura mater and arachnoid mater.

15

Extradural (epidural) hemorrhage

1. Middle meningeal artery -- usually from a blow at the pterion.
2. Surgical drainage, craniotomy. Least common type but likelihood of recovery is high.
3. Pool between bone and dura.

16

Subdural

1. Pool between dura and arachnoid
2. Bridging vv. (shaken baby) or falls in the elderly (cerebral atrophy --> stretched, weaker bridging veins).
3. Symptoms can be very slow to appear and likelihood of recovery is lower.