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Flashcards in Anatomy of space occupying lesions Deck (33):
1

What are the 5 layers to the scalp?

SCALP:
Skin
Connective tissue
Aponeurosis
Loose connective tissue
Pericranium

2

What is the pterion?

H shaped suture:
Frontal
Parietal
Temporal
Sphenoid

3

Where does the middle meningeal artery run?

Over the pterion to supply the skull bone

4

What runs in the foramen spinosum?

Middle meningeal artery

5

What runs in the jugular foramen (vascular)?

Internal jugular vein

6

What are the 3 layers of meninges?

Dura
Arachnoid
Pia

7

Describe the dura mater

Tought/fibrous
Sensory nerve supply from CN 5
Encloses dural venous sinuses between the periosteal and meningeal layer

8

Describe the arachnoid mater

Arachnoid granulations that reabsorb CSF

9

What is the tentorium cerebelli?

Sheet of dura mater that "tents" over the cerebellum
Attaches to the petrous temporal bone

10

What is the diaphragm sellae?

Tough sheet of dura mater forming a roof over the pituitary fossa

11

What is the falx cerebri?

Midline structure
Made of dura mater
Attaches to the crista galli anteriorly and the internal occipital protuberance posteriorly

12

What drains the brain directly?

Cerebral vein

13

Where will the cerebral veins drain into?

Dural venous sinuses

14

Where can you find the superior sagittal sinus?

Running along top of brain along sagittal sinus

15

What will the sigmoid sinus become?

Internal jugular vein as it passes through the jugular foramen

16

Where is the confluence of sinuses?

Midline at the internal occipital protuberance

17

What will the vertebral arteries become?

Basilar artery

18

What will the vertebral arteries pass through in the cervical foramen?

Transverse foraminae

19

What will the anterior cerebral artery supply?

Medial aspect of cerebral hemisphere

20

What will the posterior cerebral artery supply?

Posterior aspect of cerebral hemispheres including the visual cortex

21

Where is the circle of willis suspended?

Subarachnoid space - bathed in CSF

22

What part of the ventricles produces CSF?

Choroid plexus

23

Where does the subarachnoid space end?

S2

24

What is the name of the connection between the lateral ventricles and the 3rd ventricle?

Foraminae of monroe

25

What is hydrocephalus?

Excessive production, obstruction to flow or inadequate reabsorption leading to an increased CSF olume

26

What is an extradural haemorrhage?

Bleeding between bone and dura
Ruptured middle meningeal artery
Trauma to pterion

27

What is a subdural haemorrhage?

Separates dura from arachnoid
Torn cerebral vein
Falls in elderly

28

What is a subarachnoid haemorrhage?

Bleeding into CSF
Ruptured berry aneurysm
Congenital aneurysm

29

What are the different types of supratentorial herniation?

Cingulate
Central
Uncal
Transcalavarial

30

What is an uncal herniation?

Uncus (medial part) of temporal lobe herniates inferior to the tentorium cerebelli

31

What is a common sign of an uncal herniation?

Blown pupil

32

What are the different types of infratentorial herniation?

Upward
Tonsillar

33

What is a tonsillar herniation?

Cerebellar tonsils herniate into the foramen magnum