Block 4 Cranial Fossa

Front 1

Anterior cranial fossa made of

Back 1

Frontal (orbital plate), ethmoid, lesser wing of sphenoid bones

Front 2

Middle cranial fossa made of

Back 2

Greater wing of sphenoid, squamous/petrous temporal

Front 3

Posterior cranial fossa

Back 3

Temporal, occipital over petrous ridge

Front 4

Diploe

Back 4

2 outer compact, middle spongy

Front 5

-Cribiform plate located in ____ fossa, part of ____ bone
-_____Pass through

Back 5

Anterior cranial fossa; ethmoid
Olfactory

Front 6

Optic canal in ____ fossa; houses:

Back 6

Middle cranial; Optic n., opthalmic a., central a./v. of retina

Front 7

-Superior orbital fissure in ___ fossa
-Contains (5)

Back 7

-Middle
-CN 3, 4, 6; ophtalmic of 5; ophthalmic v

Front 8

Foramen rotundum in ____ fossa
-Contains

Back 8

-Middle
Maxillary division of trigeminal

Front 9

Foramen ovale in ____ fossa
-Contains

Back 9

-Middle
-Mandibular division of trigem, accessory meningeal a., lesser petrosal n.

Front 10

Foramen spinosum in ____ fossa
-Contains

Back 10

Middle
Middle meningeal a.

Front 11

Foramen lacerm in ____ fossa
-Contains

Back 11

Middle
Noting completely through, but upper part traversed by internal carotid, greater & deep petrosal n. en route to pterygoid canal

Front 12

Internal auditory meatus contains
-Fossa

Back 12

Facial and vestibulocochlear nn.; labrynthine a.
-Posterior

Front 13

Jugular foramen contains

Back 13

9, 10, 11 nn., beginning of internal jugular v.

Front 14

Hypoglassal canal contains

Back 14

Hypoglossal n. (12); meningeal a.

Front 15

Foramen magnum contains

Back 15

Spingal cord, spinal accessory n, vertebral a., venous plexus of vertebral canal, anterior and posterior spinal a

Front 16

-Receptors of olfactory neurons are:
-Axons travel in
-Synpase:

Back 16

-Embedded in mucosa of nasal cavity
-Cribiform
-Olfactory bulb

Front 17

Depression fracture of frontal bone can shear

Back 17

Olfactor nn.

Front 18

Tumors of anterior cranial fossa could cause

Back 18

Loss of smell, behavior problems, loss of taste

Front 19

-Falx cerebri
-Attachment

Back 19

-Double layer of dura mater lying between cerebral hemispheres
-Crista galli

Front 20

-Optic groove is associated with
-Houses

Back 20

-Sella turcica
-Optic chiasm

Front 21

Superior orbital fissure located between

Back 21

Greater and lesser wing of sphenoid

Front 22

Middle meningeal a. is located between ___ and ___ ; causing:

Back 22

Bone and meninges; bone to remodel

Front 23

--Epidural hematomas are usually ____ in origin; fracture of ____ bone might cause hematoma because of ____
--Subdural hematomas are usually ____ in origin

Back 23

--Arterial; temporal bone; middle meningeal
--Venous

Front 24

Hypoglossal canal is just anterior/lateral to

Back 24

Clivus

Front 25

Transition from medulla to spinal cord is located at

Back 25

Foramen magnum

Front 26

Spinal portion of spinal accessory n. arises from ____ goes into ___, exits ____ to join accessory n.

Back 26

Cervical spine; cerebral vault; jugular foramen;

Front 27

-Anterior fossa houses ____ lobe of brain
-Middle
-Posterior

Back 27

-Frontal
-Temporal
-Cerebellum, no cortex

Front 28

Dura is adherent to:

Back 28

Skull

Front 29

-CSF located in
-Produced in ___, then flows into
-Both lateral feed into

Back 29

-Subarachnoid space
-Choroid plexus of 3rd ventricle ; cerebral aquaduct
-3

Front 30

CSF leaves ventricular system in ____, going to:

Back 30

4th ventricle; subarachnoid space

Front 31

CSF is voided into ____ via ____ which pierce the dura forming diverticulum

Back 31

Dural sinuses; arachnoid granulations;

Front 32

Hydrocephalous

Back 32

Build up of CSF

Front 33

___ forms outer surface of cortex & cerebellum

Back 33

Pia

Front 34

___ descends into sulci of cerebral cortex, where as ____ does not

Back 34

Pia; arachnoid and dura

Front 35

Arachnoid and dura to penetrate:

Back 35

Fissure between L and R

Front 36

How infections of scalp can gain access inside cranial vault

Back 36

Emissary vv.

Front 37

-Posterior retina bulge =
-Possible cause

Back 37

-Papilledema
-Swelling/bleeding of subarachnoid space --> aneurism burst --> increased pressure --> transmitted throug meningeal reflection

Front 38

Largest connection point of cerebral hemispheres to each other

Back 38

Corpus collosum

Front 39

Falx cerebelli

Back 39

Separates cerebellar hemisphers

Front 40

Tentorium cerebelli
Defect is for

Back 40

-Supports occipital lobes of; covers cerebellum
-Brain stem

Front 41

-Superior sagittal sinus within
-Inferior saggital
-Occipital sinus
-Transverse
-Superior petrosal

Back 41

-Convex border of falx cerebri
-Concave broder of falx
-Falx cerebelli
-External convex border of tentorium (posterior)
-Anterior tentorium

Front 42

Diverticulum of sinus on midline

Back 42

Lacuna

Front 43

____ vein drains deep brain structures

Back 43

Cerebral v. of Galen

Front 44

Cerebral v. of Galen drains into ____ sinus located at ___ --> ___ sinus --> ___ sinus --> ___ v.

Back 44

Straight sinus; junction of falx cerebri with tentorium --> transverse sinus --> sigmoid sinus --> INternal jugular

Front 45

Facial v can either drain to __ or through ___

Back 45

Jugular; orbit via superior ophtalmic

Front 46

superior ophtalmic exit orbital cavity through

Back 46

Superior orbital fissure

Front 47

Superior orbital fissure drains to ___ sinus --> backward to ___ sinus --> ____ sinus

Back 47

Cavernous sinus --> superior and petrosal --> confluence

Front 48

Confluence drains to ___ sinus --> ___ sinus ---> __ v

Back 48

Transverse --> sigmoid --> internal jugular

Front 49

Inferior petrosal sinus runs beside ___; empties into

Back 49

Clivus; junction of sigmoid sinus and internal jugular

Front 50

Sinuses

Back 50

Sinuses

Front 51

4 major aa. supplying cranial vault

Back 51

2 carotids, 2 vertebrals

Front 52

-CNs that are encased in dural wall in lateral wall of cavernous
sinus
-CN floating in cavernous sinus

Back 52

-3, 4, V1, V2
-6

Front 53

Danger area of sinuses

Back 53

Acnes on either side of nose

Front 54

Acne draining to facial v could cause infection of ___; affecting ___ first

Back 54

Cavernous sinus; CN 6

Front 55

Result of Abducens n. injury

Back 55

Medially deviated eyeball

Front 56

Branches from basilar a. (SLAPP)

Back 56

Superior cerebellar
Labyrinth
Anterior-inferior cerebellar
Pontina
Posterior cerebral

Front 57

Branches of the internal carotid (POM AA)

Back 57

Posterior communicating
Ophthalmic
Middle cerebral
Anterior choroidal
Anterior cerebral

Front 58

___ a. penetrates internal auditory meatus to supply

Back 58

Internal and middle ear

Front 59

Posterior communicating a. connects

Back 59

Internal carotid to posterior cerebral

Front 60

Posterior cerebral off:
Anterior:
Middle:

Back 60

-Basilar
-Internal carotid
-Internal carotid

Front 61

___ closes Arterial Circle of Willis

Back 61

Anterior communicating

Front 62

Ophtlamic a. is off

Back 62

Internal carotid

Front 63

Nerves arising from pons

Back 63

5 (motor), 6, 7, 8

Front 64

If you have a stroke in the pons, and CN 5 originates in pons, what defects occur

Back 64

CN is sensation to face and mm. of mastication (numbness of face, weakness in mm. of mastication)

Front 65

-Occipital lobe function
-Arterial supply

Back 65

-Vision
-Posteiror cerebral

Front 66

Nerves from midbrain (mesencephalon)

Back 66

3, 4

Front 67

Nerves from medulla

Back 67

5 (afferent), 7 (taste), 9 (VE), 10 (VE), 12

Front 68

Frontal lobe function
Supply

Back 68

-thinking, planning, & central executive functions; motor execution
-Anterior cerebral

Front 69

Parietal lobe function
Supply

Back 69

-Somatosensory perception
integration of visual & somatospatial information
-Anterior cerebral, middle cerebral

Front 70

-Temporal lobe function
-Supply

Back 70

language function and auditory perception
involved in long term memory and emotion
-Posteriorcerebral