SKULL Flashcards
(63 cards)
1
Q
A
Squamous part of temporal bone
2
Q
A
External acoustic meatus
3
Q
A
Mastoid process
4
Q
A
Mandibular fossa
5
Q
A
Pterion
6
Q
A
Styloid process
7
Q
A
Anterior articular tubercle (of temporal bone)
8
Q
A
Greater wing of Sphenoid
9
Q
A
Zygomatic process of Temporal bone
10
Q
A
Incisive foramen
11
Q
A
Pterygoid hamulus
12
Q
A
Foramen Ovale
13
Q
A
Foramen Spinosum
14
Q
A
Jugular foramen
15
Q
A
Occipital condyle
16
Q
A
Foramen magnum
17
Q
A
Lateral pterygoid plate of Sphenoid
18
Q
A
Stylomastoid foramen
19
Q
A
Optic canal
20
Q
A
Internal acoustic meatus
21
Q
A
Jugular foramen
22
Q
A
Hypoglossal canal
23
Q
A
Cribiform plate
24
Q
A
Foramen spinosum
25
Superior orbital fissure
26
Foramen rotundum
27
Foramen ovale
28
Fontanelles of the skull
CT gaps or soft spots (needed for birth)
Anterior = junction of sagittal and coronal sutures, closses ~18 months of age, later called BREGMA
Posterior = junction of lamboidal and sagittal sutures, closes ~3 months of age, later called LAMBDA
29
Wormian bones
Tiny bones of the skull encased totally by sutures
30
Sutures of the skull
Sagittal = top of skull, interparietal
Coronal = btwn frontal + 2 parietal bones
Lamboidal = btwn occiptal + 2 parietal bones
Squamosal = btwn temporal and parietal bones
31
Lambda
Junction of sagittal and lambodial sutures
where ligamentum nuchae attaches
BACK OF HEAD
32
Bregma
jcn of sagittal and coronal sutures
TOP OF HEAD
33
Pterion
Jcn of coronal suture, squamosal suture, and greater wing of sphenoid
WEAK POINT over middle meningeal artery, danger area
34
And what is in each
Blue = ANTERIOR cranial fossa
- Anterior of cranium to lesser wings of sphenoid
- Front lobes of brain rest here, cribiform plate, anterior ethmoidal foramen, posterior ethmoidal foramen, foramina or cribiform plate
Red = MIDDLE cranial fossa
- "step down from anterior cranial fossa"
- **formed by sphenoid and temporal bone**
- contains anterior aspect of temporal lobes and MANY FORAMNIA
- optic canal, hypophyseal fossa, superior orbital fissure, foramen rotundum, foramen ovale, foramen spinosum
Green = POSTERIOR cranial fossa
- "step down from middle cranial fossa"
- **occipital bone, temporal bone, parietal + sphenoid**
- impressions from sinuses, confluence of sinuses, + cerebellum
- foramen magum, internal acoustic meatus, jugular foramen, hypoglossal canal, condyloid canal
35
What goes through foramen magum
Medulla, meninges, vertebral aa., spinal branch of CN XI
36
What goes through internal acoustic meatus?
CN VII
CN VIII
labyrinthine a.
37
Contents of jugular foramen
CN IX, CN X, CN XI
inferior petrosal sinus
sigmoid sinus
posterior meningeal artery
38
Lesser wing of Sphenoid bone
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Greater wing of Sphenoid bone
40
Posterior clinoid process
41
Anterior clinoid process
42
Cribiform plate (part of Ethmoid plate)
43
Superior orbital fissure
44
Sella Turcica (\*\*pituitary gland sits here)
45
Foramen rotundum
46
Optic canal
47
Draw the sutures and landmarks of skull
48
Neurocranial bones
Viscerocranium bones
**Neurocranium**
Parietal (2)
Occipital
Temporal (2)
Frontal
Sphenoid
Ethmoid
**Viscerocranium**
Zygomatic (2)
Lacrimal
Nasal (2)
Maxilla (2)
Mandible (2)
Palatine (2)
Inferior nasal conchae (2)
49
Ethmoid bone
Crista galli - for attachment of falx cerebi, it is the peak with the cribiform plate running on both sides
Cribiform plate
Anterior, middle, and posterior ethmoidal air cells
Superior and middle conchae
50
green - Optical canal
red - Superior Orbital Fissure
orange - Foramen Rotundum
blue - foramen Ovale
black - Internal acoustic meatus
purple - Foramen spinosum
yellow - jugular foramen
51
red - Cribiform plate
black - Cristi galli (houses falx cerebri)
purple - Internal acoustic meatus
blue - Jugular foramen
green - Hypoglossal canal
orange - Foramen Magum
52
green - Zygomatic bone
yellow - Greater wing of Sphenoid
red - Zygomatic arch
black - External acoustic meatus
blue - Pterion
purple - External occipital protruberance
orange - Mastoid process
53
What four bones connect here and why is it clinically important?
\*PTERION\*
Frontal, greater wing of Sphenoid, temporal, and partietal bone join
middle meningeal artery lies underneath
54
Vomer bone
55
red - Incisive fossa or foramen
orange - Greater palatine foramen
yellow - Foramen Ovale
green - foramen Spinosum
blue - foramen Lacerum
purple - Carotid canal
black - jugular fossa
56
red - Greater palatine foramen
yellow - lesser palatine foramen
orange - Pteryoid hamulus
green - Mastoid process
57
red - Choana
blue - Inferior orbital fissure
yellow - Foramen Ovale
green - Foramen Spinosum
purple - Condylar canal
58
What attaches to styloid process of temporal bone?
stylohyoid (VII)
Styloglossus (XII)
stylopharyngeus (IX)
59
What is the sagittal sulcus?
Seen from the inferior view of the skull - this is where the superior sagittal sinus runs
You can have cranial stenosis if you are born with this closed
60
What runs through optic canal
Optic n. (CN II)
Opthalmic a.
61
What runs through the mental foramen?
Mental n. (branch off of inferior alveolar n., branch of mandibular n./V3)
Mental a. and v. too
62
Where is the pituitary gland housed?
Within the hypophyseal fossa, which is in the sella turcica (in the Sphenoid bone)
...in the middle cranial fossa
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