Week 1 - DRY

Question 1

Draw and label the circle of Willis

Answer 1

Check against diagram in anatomy book, page 98

Question 2

From which arteries do the left & right vertebral arteries arise?

Answer 2

Subclavian

Question 3

At what vertebral level do the left & right internal carotid arteries arise?

Answer 3

C4

Question 4

How is the basilar artery formed and which part of the brainstem is it most closely related to?

Answer 4

Union of L + R vertebral arteries

Pons

Question 5

Which arteries complete the posterior of the Circle of Willis by linking the internal carotid arteries to the posterior cerebral arteries?

Answer 5

Posterior communicating

Question 6

Which artery completes the anterior of the Circle of Willis by linking the anterior cerebral arteries?

Answer 6

Anterior communicating

Question 7

In which fissure of the brain does the anterior cerebral artery travel?

Answer 7

Median Longitudinal Fissure

Question 8

In which fissure of the brain does the middle cerebral artery travel in?

Answer 8

Lateral sulcus

Question 9

In which fissure of the brain does the posterior cerebral artery travel?

Answer 9

Parieto-occipital

Question 10

Which cerebral artery supplies:

1) Primary motor cortex
2) Primary Sensory Area
3) Primary visual area
4) Primary auditory area
5) Area for olfaction

Answer 10

1) Middle
2) Middle
3) Posterior
4) Middle
5) Middle

Question 11

Which parts of the brain does the vertebro-basilar system supply?

Answer 11

Brainstem and cerebellum

Question 12

Which cranial nerve emerges from just above the superior cerebellar artery?

Answer 12

III

Question 13

Label the main dural venous sinuses of the brain.

Answer 13

Question 14

Into which vein in the neck do these dural venous sinuses drain into?

Answer 14

Internal Jugular

Question 15

Through which foramen in the skull does the IJV pass?

Answer 15

Jugular foramen

Question 16

The opthalmic veins drain into what venous sinus?

Answer 16

Cavernous sinus

Question 17

What structures in the skull base is the cavernous sinus closely related to?

Answer 17

Pituitary gland

Question 18

Branches from which arteries fuse to form the anterior spinal artery?

Answer 18

Vertebral

Question 19

Which arteries are the posterior spinal arteries branches of?

Answer 19

Vertebral (correct)

Question 20

What fluid circulates in the subarachnoid space?

Answer 20

CSF

Question 21

Which structures does the falx cerebri separate?

Answer 21

The cerebral hemispheres

Question 22

To what bony structures does the falx cerebri attach anteriorly?

Answer 22

Crista Galli

Frontal crest processes

Question 23

Which dural venous sinus runs within the upper border of the falx cerebri?

Answer 23

Superior saggital sinus

Question 24

Which dural venous sinus runs along the lower border of the falx cerebri?

Answer 24

Inferior saggital sinus

Question 25

What structures lie on either side of the tentorium cerebelli?

Answer 25

[https://en.wikipedia.org/wiki/Cerebellar\_tentorium](https://en.wikipedia.org/wiki/Cerebellar_tentorium) Cerebellum Cerebrum (inferior aspect of occipital lobe)

Question 26

To what bony points does the anterior edge of the tentorium cerebelli attach to?

Answer 26

Clinoid processes of sphenoid

Question 27

Which dural venous sinus runs along the attachment of the falx cerebri to the tentorium?

Answer 27

Straight sinus

Question 28

What is the dural fold that separates the two cerebellar hemispheres called?

Answer 28

Falx cerebelli

Question 29

What is the fold of dura that surrounds the pituitary stalk called?

Answer 29

Diaphragmae sellae

Question 30

Through which foramen in the skull does the middle meningeal artery enter the cranial cavity?

Answer 30

Foramen spinosum

Question 31

Which artery is the maxillary artery a terminal branch of and within which glandular structure is it give off?

Answer 31

External carotid Parotid gland

Question 32

What embryological structures are the brain ventricles formed from?

Answer 32

Neural tube

Question 33

What name is given to the specialised structures that lie in the ventricles that generate CSF?

Answer 33

Choroid plexus

Question 34

How does CSF pass into the subarachnoid space from the 4th ventricle?

Answer 34

Median aperture - foramen of Magendie (1) Lateral apertures - foramen of Luschka (2)

Question 35

How is CSF finally resorbed back into the general circulation?

Answer 35

Arachnoid granulations contain small **arachnoid villi** that re-absorb CSF into the superior saggital sinus

Question 36

On a bony skull cap identify the groove for the superior sagittal sinus. Identify indentations on either side of this groove. What makes these indentations?

Answer 36

Arachnoid villi?