Lab 1- The cranial cavity and its contents

Question 1

What demarcates the boundary between the Anterior cranial fossae and the middle cranial fossae?

Answer 1

lesser wing of the sphenoid

Question 2

What demarcates the boundary between the Posterior cranial fossae and the middle cranial fossae?

Answer 2

Petrous ridge

Question 3

A lateral blow to the side of the head could fracture the inner table of bone and rupture the anterior branch of the
middle meningeal artery. Between what layers does the hemorrhage occur?

Answer 3

It occurs between the inner table and th e Periosteum. Creating an extradural hemorrhage/Epidural hemorrhage

Question 4

The posterior cranial fossa contains which major part of the brain?

Answer 4

it contains the brainstem and cerebellum.

Question 5

The falx cerebri separates which two structures?

Answer 5

The falx cerebri divides the two cerebral hemispheres

Question 6

Which are the largest and most consistently present emissary veins in the head?

Answer 6

Ophthalmic emissary veins: join the vessels draining the orbital structures to the cavernous sinus.

Question 7

Answer 7

Question 8

what are the three meningeal coverings that protect the brain?

Answer 8

1) Dura
2) Arachnoid
3) Pia matter

Question 9

What is the outermost Mengial layer what is it attached to?

Answer 9

the Dura

it is attached to the skull

Question 10

What does the Arachnoid layer attach to?

Which layer is it?

Answer 10

It is the middle “spider-like layer”

It attaches to the dura layer

Question 11

What is the innermost meningeal layer?

What does it attach to?

Answer 11

the Pia mater

attaches to the brain

Question 12

Craninal nerve Mnemonic

Answer 12

Oh oh oh to touch and feel virgin girls vaginas and hymens

Olfactory, optic, occulomotor, trochlear, trigeminal, abducens, facial, vestibhlocochlear, glossopharyngeal, vagus, accessory, hypoglossal

Question 14

What are the two locations where the inner meningeal dural layer forms fold that descend into the cranial cavity?

Answer 14

1) Falx cerebri
2) Tentorium cerebelli

Question 15

Answer 15

Question 16

Answer 16

Question 17

What is the green layer?

Answer 17

Arachnoid mater

Question 18

What is the green layer?

Answer 18

Arachnoid granulations

Question 19

Answer 19

Question 20

Answer 20

Question 21

Answer 21

Question 22

What makes up the cranial dura

Answer 22

the Periosteal layer and the Meningeal layer

Question 23

Answer 23

Question 24

Answer 24

Question 25

Answer 25

Question 26

Answer 26

Question 27

Clinical Significance of the emissary veins? (3)

Answer 27

1) Infections
2) middle meningeal artery rupture leads to extradural hematoma
3) Rupture of bridging veins lead to subdural hematoma

Question 28

Answer 28

Answer 29

Question 30

Answer 30

Question 31

Answer 31

Question 32

Answer 32

Question 33

Rupture of aaneursym on artery leads to bleeding directly into _____________ _____ and ___

Answer 33

Rupture of aneurysm on artery leads to bleeding directly into Subarachnoid space and CSF

Question 34

Answer 34

Question 35

Answer 35

Question 36

Answer 36

Question 37

Answer 37

Question 38

Answer 38

Question 39

A lateral blow to the side of the head could fracture the inner table of bone and rupture the anterior branch of the middle meningeal artery. Between what layers does the hemorrhage occur?

Answer 39

Between the Dura and the bone

Question 40

The posterior cranial fossa contains which major part of the brain?

Answer 40

Cerebellum

Question 41

The falx cerebri separates which two structures?

Answer 41

the two hemispheres of the brain

Question 42

Which are the largest and most consistently present emissary veins in the head?

Answer 42

The ophthalmic arteries