Anatomy of SOL

Question 1

What are the 5 layers of the scalp?

Answer 1

skin
connective tissue
loose connective tissue
pericranium

Question 2

What artery crosses over the deep aspect of the pterion?

Answer 2

middle meningeal artery

Question 3

What is the sensory nerve supply of dura mater?

Answer 3

mainly CNV

Question 4

What is the function of arachnoid granulations?

Answer 4

reabsorb CSF

Question 5

What is the tentorium cerebelli?

Answer 5

tough sheet of dura mater tenting over the cerebellum

Question 6

What does tentorium cerebelli attach to?

Answer 6

ridges of the petrous temporal bones

Question 7

What is the diaphragm sellae?

Answer 7

tough sheet of dura mater over the pituitary fossa

Question 8

What does falx cerebri separate?

Answer 8

the right and left cerebral hemispheres

Question 9

What are the attachments of falx cerebri?

Answer 9

crista galli; internal aspect of the sagittal suture; internal occipital protuberance posteriorly

Question 10

What is the function of the cerebral veins?

Answer 10

drain venous blood from the brain into dural venous sinuses

Question 11

What does the sigmoid sinus drain into?

Answer 11

IJV

Question 12

Where does the sigmoid sinus drain into the IJV?

Answer 12

jugular foramen

Question 13

Where is the confluence of the sinuses?

Answer 13

midline at the internal occipital protruberance

Question 14

How do the vertebral arteries reach the cranial cavity?

Answer 14

pass through transverse foraminae then through foramen magnum

Question 15

How does the internal carotid artery reach the brain?

Answer 15

travels in carotid sheath then carotid canal

Question 16

Which artery supplies the medial aspect of the cerebral hemispheres?

Answer 16

anterior cerebral arteries

Question 17

What important area does the posterior cerebral artery supply?

Answer 17

visual cortex

Question 18

Which arteries supply the lateral aspects of the cerebral hemispheres?

Answer 18

middle cerebral arteries

Question 19

What space are the arteries supplying the brain found within?

Answer 19

subarachnoid space

Question 20

Where does the subarachnoid space end inferiorly?

Answer 20

level of S2

Question 21

What secretes CSF?

Answer 21

secreted by the choroid plexus

Question 22

Where is the choroid plexus located?

Answer 22

lateral and third ventricles

Question 23

What are the arachnoid granulations?

Answer 23

herniations of arachnoid mater that protrude into the dural venous sinuses

Question 24

Where is an extradural haemorrhage located?

Answer 24

between the bone and the dura

Question 25

What causes an extradural haemorrhage?

Answer 25

ruptured middle meningeal a. from trauma to the pterion

Question 26

What causes a subdural haemorrhage?

Answer 26

torn cerebral veins (falls)

Question 27

What happens in a subdural haemorrhage?

Answer 27

dura and arachnoid are separated

Question 28

What causes a subarachnoid haemorrhage?

Answer 28

ruptured berry aneurysm