Skull

Question 1

name the 3 sutures of the skull bones.

which is most posterior?

Answer 1

coronal, saggital and lambdoid.

lambdoid most posterior

Question 2

where is the line of demarcation b/w the vertical and horizonatal plates of the frontal bone

Answer 2

supraorbital margin

Question 3

what is the pterion?

Answer 3

where 4 bones meet on the skull (frontal,parietal,temporal and sphenoid)

Question 4

name the 3 processes of the temporal bone

Answer 4

styloid, zygomatic and mastoid

Question 5

what is the petros?

Answer 5

projection of the temporal bone into the cavity of the middle cranial fossa

Question 6

name the anterior fossa of the the skull and what exits through here

Answer 6

cribiform plate - olfactory nerve exits

Question 7

name the 4 fossa that form an arc in the middle fossa. What exits through them

Answer 7

SROS

Superior orbital fissure (CN III, IV, V1, VI)

Foramen Rotundum (V2)

Foramen Ovale (V3)

Foramen Spinosum (Middle Meningial)

Question 8

where does the middle meningial artery come from

Answer 8

off the maxillary (itself one of the terminal branches of external carotid)

Question 9

name the middle cranial fossa that arent part of the arc.

What exits them?

Answer 9

Hypophysial Fossa (pituitary gland)

optic canal (CN II)

Question 10

name the foramen in the posterior fossa.

What exits them?

Answer 10

internal acoustic meatus (CN VII,VIII)

Jugular Foramen (CN 9-11)

Hypoglossal canal ( CN 12)

Foramen Magnum (spinal chord)

Question 11

Name the 3 layers of the meninges

Answer 11

dura, arachnoid and pia

Question 12

what is the purpose of arachnoid granulations?

Answer 12

to allow csf to drain into the venous sinuses

Question 13

what is the diaphragma sellae?

Answer 13

dural fold that almost completely roofs the hypophyseal fossa (pituitary gland)

Question 14

what is the falx cerebri and what is its prupose?

Answer 14

dural fold b/w hemipheres. restricts rotatory displacemnt on blow to skull

Question 15

where are the tentorium cerebelli and falx cerebelli respectively?

Answer 15

tentorium roofs the posterior fossa, seperating occiptal lobe from cerebellum.

falx cerebelli is b/w cerebellar hemispheres

Question 16

what is the confluence of sinuses?

Answer 16

where the superior saggital sinus meets the straight sinus & transverse sinus

Question 17

what is the contiuation of the straight sinus and transverse sinus rwspectively?

Answer 17

Great cerebral Vein.

Sigmoid Sinus

Question 18

infection of the face may travel thourgh which veins and end up in which sinus?

Answer 18

opthalmic veins to carvernous sinus

Question 19

breaking the pterion will endanger which artery?

Answer 19

middle meningeal

Question 20

5 layers of the scalp.

Where is the neurovasculature?

Which layer allows movement

Answer 20

SCALP

Skin

Connective Tissue (has neurovasculature)

Aponeurosis

Loose Connective Tissue (movement)

Pericranium

Question 21

borders of the scalp?

Answer 21

Supraorbital margin to EOP (external occipital protuberance)

Question 22

Layers of the face?

Answer 22

4 Layers. Similar to scalp but no aponeurosis

Skin

Connective Tissue

Muscle (facial muscles)

Percranium

Question 23

why do scalp wounds gape?

Answer 23

rich arterial supply. When there is a divide in aponeurosis the opposing muscles (frontalis and occipitalis) pull further apart

Question 24

2 main muscles of the scalp

Answer 24

frontalis and occipitalis

Question 25

sensory supply to back of head?

Answer 25

c2

Question 26

name the 4 main arteries of the face, where they supply and their origins

Answer 26

All more or less supply the area of their name. facial supplies maxilla ( branch of exeternal carotid) Superficial Temporal supplies lateral part of face (end branch of external carotid) Trochlea supplies around trochlea (internal cartotid) Supra orbital supplies lateral of trochlea (internal carotid)

Question 27

veins of the face?

Answer 27

mimic arteries

Question 28

name the contents of the parotid gland form superficial to deep

Answer 28

facial nerve (doesnt actually supply it) Retromandibular vein External carotid artery Parotid Lymph nodes

Question 29

what innervates the parotid gland

Answer 29

CNIX

Question 30

what makes up the retromandibular vein

Answer 30

maxillary vein and superficial temporal vein (mirrors endpoints of external caortid artery)

Question 31

which branches does hte external carotid give off and where is the bifurcation?

Answer 31

maxillary and superficial temporal. does so in parotid

Question 32

dysfunction of the facial nerve is what?

Answer 32

Bells palsy

Question 33

Temporal, Zygomatic, Buccal, Mandibular and Cervical are branches of which nerve? Where is the branching?

Answer 33

Ten Zombies Bit My Cap branches of facial nerve within parotid

Question 34

borders of parotid?

Answer 34

superior margin = zygomatic arch Inferior = mandible Ventral = masseter Dorsal = mastoid procces Deep = styloid process

Question 35

what surrounds hte parotid gland and when will this swell

Answer 35

fibrous capsule will swell with mumps

Question 36

what does the parotid gland do and what are the logistics?

Answer 36

serous salivary gland

Question 37

describe course of parotid duct

Answer 37

on masseter, pierces buccinator and enters oral cavity above 2nd upper molar