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Anat > Skull > Flashcards

Skull Flashcards

1
Q

name the 3 sutures of the skull bones.

which is most posterior?

A

coronal, saggital and lambdoid.

lambdoid most posterior

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2
Q

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

A

supraorbital margin

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3
Q

what is the pterion?

A

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

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4
Q

name the 3 processes of the temporal bone

A

styloid, zygomatic and mastoid

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5
Q

what is the petros?

A

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

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6
Q

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

A

cribiform plate - olfactory nerve exits

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7
Q

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

A

SROS

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

Foramen Rotundum (V2)

Foramen Ovale (V3)

Foramen Spinosum (Middle Meningial)

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8
Q

where does the middle meningial artery come from

A

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

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9
Q

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

What exits them?

A

Hypophysial Fossa (pituitary gland)

optic canal (CN II)

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10
Q

name the foramen in the posterior fossa.

What exits them?

A

internal acoustic meatus (CN VII,VIII)

Jugular Foramen (CN 9-11)

Hypoglossal canal ( CN 12)

Foramen Magnum (spinal chord)

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11
Q

Name the 3 layers of the meninges

A

dura, arachnoid and pia

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12
Q

what is the purpose of arachnoid granulations?

A

to allow csf to drain into the venous sinuses

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13
Q

what is the diaphragma sellae?

A

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

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14
Q

what is the falx cerebri and what is its prupose?

A

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

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15
Q

where are the tentorium cerebelli and falx cerebelli respectively?

A

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

falx cerebelli is b/w cerebellar hemispheres

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16
Q

what is the confluence of sinuses?

A

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

17
Q

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

A

Great cerebral Vein.

Sigmoid Sinus

18
Q

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

A

opthalmic veins to carvernous sinus

19
Q

breaking the pterion will endanger which artery?

A

middle meningeal

20
Q

5 layers of the scalp.

Where is the neurovasculature?

Which layer allows movement

A

SCALP

Skin

Connective Tissue (has neurovasculature)

Aponeurosis

Loose Connective Tissue (movement)

Pericranium

21
Q

borders of the scalp?

A

Supraorbital margin to EOP (external occipital protuberance)

22
Q

Layers of the face?

A

4 Layers. Similar to scalp but no aponeurosis

Skin

Connective Tissue

Muscle (facial muscles)

Percranium

23
Q

why do scalp wounds gape?

A

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

24
Q

2 main muscles of the scalp

A

frontalis and occipitalis

25
Q

sensory supply to back of head?

A

c2

26
Q

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

A

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)

27
Q

veins of the face?

A

mimic arteries

28
Q

name the contents of the parotid gland form superficial to deep

A

facial nerve (doesnt actually supply it)

Retromandibular vein

External carotid artery

Parotid Lymph nodes

29
Q

what innervates the parotid gland

A

CNIX

30
Q

what makes up the retromandibular vein

A

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

31
Q

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

A

maxillary and superficial temporal. does so in parotid

32
Q

dysfunction of the facial nerve is what?

A

Bells palsy

33
Q

Temporal, Zygomatic, Buccal, Mandibular and Cervical are branches of which nerve?

Where is the branching?

A

Ten Zombies Bit My Cap

branches of facial nerve within parotid

34
Q

borders of parotid?

A

superior margin = zygomatic arch

Inferior = mandible

Ventral = masseter

Dorsal = mastoid procces

Deep = styloid process

35
Q

what surrounds hte parotid gland and when will this swell

A

fibrous capsule will swell with mumps

36
Q

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

A

serous salivary gland

37
Q

describe course of parotid duct

A

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

Anat (13 decks)

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