Skull Flashcards

1
Q

Name the paired bones of the cranium

A
Parietal
Temporal 
Nasal
Lacrimal
Inferior Nasal Concha
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2
Q

Name the unpaired bones of the cranium

A
Frontal 
Sphenoid
Occipital
Ethmoid
Vomer
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3
Q

How many bones in the cranium?

A

15

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4
Q

How many bones of the face?

A

7

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5
Q

Name the paired bones of the face

A

Maxilla
Palatine
Zygomatic

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6
Q

Name the unpaired bones of the face

A

Mandible

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7
Q

What is diploe?

A

Inner spongy portion of the flat bones

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8
Q

What are pneumatic bones?

A

Spongy bone partially replaced by cavities

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9
Q

What are the two types of pneumatic bones?

A

Paranasal sinuses

Mastoid air cells

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10
Q

In what bones are the paranasal sinuses present?

A

Maxilla
Ethmoid
Sphenoid
Frontal

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11
Q

What are mastoid air cells?

A

Air cavities in the mastoid process developing from the middle ear cavity

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12
Q

What are Wormian bones?

A

Small bits of bones located in some sutures

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13
Q

What’s another name for Wormian bones?

A

Sutural bones

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14
Q

What are the landmarks/structures that are part of the frontal bone?

A
Superciliary arches
Glabella 
Supraorbital Foramen (notch)
Orbital Process
Frontal Sinus
Foramen Cecum
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15
Q

What are the landmarks/structures that are part of the parietal bones?

A

Superior Temporal Line

Inferior Temporal Line

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16
Q

What structures are associated with the landmarks of the parietal bones?

A

Temporal fascia is attached to the superior temporal line and the temporalis muscle is attached to the inferior temporal line

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17
Q

What are the divisions of the temporal bone?

A

Squamosal portion
Mastoid portion
Styloid process
Petrous portion

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18
Q

On what portion of the temporal bone would you find the inner ear?

A

Petrous portion

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19
Q

What is the name of the flat portion of the temporal bone?

A

Squamosal portion

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20
Q

What are the landmarks/structures of the temporal bone?

A
Mastoid foramen 
Stylomastoid foramen 
Carotid Canal 
Jugular Canal 
Foramen lacerum
External Acoustic Meatus
Internal Acoustic Meatus
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21
Q

Of which bone is the mastoid foramen and what does it transmit?

A

Temporal bone

Emissary vein

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22
Q

Of which bone is the stylomastoid foramen and what does it transmit?

A
Temporal bone
Facial nerve (CN VII)
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23
Q

Of which bone is the carotid canal and what does it transmit?

A

Temporal bone

Internal carotid artery

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24
Q

Of which bone is the jugular canal and what does it transmit?

A
Temporal bone
Internal jugular vein
Glossopharyngeal nerve
Vagus nerve
Spinal accessory nerve
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25
Q

Of which bone is the foramen lacerum and what does it transmit?

A

Temporal bone and generally is filled with cartilage

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26
Q

Of what bone is the external acoustic meatus and what does it transmit?

A

Temporal bone

Sound waves - opening of the external ear

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27
Q

Of what bone is the internal acoustic meatus and what does it transmit?

A

Temporal bone
Facial nerve
Vestibulocochlear nerve

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28
Q

What are the landmarks/structures associated with the occipital bone?

A
Foramen Magnum
Occipital condyles
External Occipital Protuberance
Superior Nuchal Line
Inferior Nuchal Line 
Condylar Canal
Hypoglossal Canal
Clivus
Sulcus for Sigmoid Sinus
Internal Occipital Protuberance
Sulcus for Transverse Sinus
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29
Q

Of what bone is the foramen magnum associated and what does it transmit?

A

Occipital Bone
Spinal cord
Spinal Accessory Nerve
Vertebral Artery

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30
Q

Of which bone are the occipital condyles?

A

Occipital bone

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31
Q

Of which bone is the external occipital protuberance?

A

Occipital bone

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32
Q

Of which bone is the condylar canal and what does it transmit?

A

Occipital bone

Emissary vein

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33
Q

Of which bone is the superior nuchal line and what is its approximate location?

A

Occipital bone

Extends laterally from the EOP

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34
Q

Of which bone is the inferior nuchal line and what is its approximate location?

A

Occipital bone

Extends laterally from inferior to the EOP about halfway between the EOP and the foramen magnum

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35
Q

Of which bone is the hypoglossal canal and what does it transmit?

A
Occipital bone
Hypoglossal nerve (CN XII)
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36
Q

Of which bone is the clivus; what is its approximate location and function?

A

Occipital bone
Anterior to the foramen magnum
Provides space for the pons

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37
Q

Of which bone is the sulcus of the sigmoid sinus; what is its approximate location and function?

A

Occipital bone
Extends from jugular foramen of the temporal bone
Transmits venous blood and allows exit through internal jugular vein

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38
Q

Of which bone is the internal occipital protuberance?

A

Occipital bone

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39
Q

Of which bone is the sulcus for the transverse sinus; what is its approximate location and function?

A

Occipital bone
Inner, transverse sulcus approx at the level of the superior nuchal line
The tentorium cerebri attaches to the margins

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40
Q

What are the divisions of the sphenoid?

A

Body
Greater and Lesser wings
Pterygoid Processes

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41
Q

What are the associated landmarks and structures of the body of the sphenoid?

A

Sella Turcica

Sphenoid Sinus

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42
Q

Of what bone is the sella turcica; what is its approximation location and its function?

A

Sphenoid
Body of sphenoid
Houses the pituitary gland

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43
Q

Of what bone is the sphenoid sinus and what is its approximate location?

A

Sphenoid bone

Located on the body of the sphenoid

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44
Q

What are the associated landmarks and structures of the greater wings of the sphenoid?

A

Foramen rotundum
Foramen ovale
Foramen spinosum

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45
Q

Of what bone is the foramen rotundum; what is its approximate location and function?

A

Sphenoid
Greater wings of sphenoid
Transmits maxillary division of the trigeminal nerve
Connects the middle cranial fossa and pterygopalatine fossa

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46
Q

Of what bone is the foramen ovale; what is its approximate location and function?

A

Sphenoid bone
Greater wings of the sphenoid
Transmits the mandibular division of the trigeminal nerve (and others)

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47
Q

Of what bone is the foramen spinosum; what is its approximate location and function?

A

Sphenoid
Greater wings of sphenoid
Transmits the middle meningeal artery

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48
Q

What are the associated landmarks and structures of the lesser wings of the sphenoid?

A

Optic Foramen (canal)
Superior Orbital Fissure
Anterior clinoid process
Chiasmatic groove

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49
Q

Of what bone is the optic foramen (canal); what is its approximate location and function?

A

Sphenoid
Lesser wings of the sphenoid
Transmits optic nerves and ophthalmic arteries

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50
Q

Of what bone is the superior orbital fissure; what is its approximate location and function?

A

Sphenoid
Lesser wings of the sphenoid
Transmits the oculomotor nerve, trochlear nerve, ophthalmic division of the trigeminal nerve, and abducens nerve

51
Q

Of which bone is the anterior clinoid process; what is its approximate location and function?

A

Sphenoid
Lesser wings of the sphenoid
Pointed projections extending over the sella turcica and is where dura attaches

52
Q

Of what bone is the chiasmatic groove; what is its approximate location and function?

A

Sphenoid
Lesser wings of the sphenoid
Unites the 2 optic canal - formed by the optic chiasm

53
Q

What are the associated landmarks and structures of the pterygoid process of the sphenoid?

A
Medial Pterygoid Plate (lamina)
Hamulus
Lateral Pterygoid Plate (lamina)
Pterygomaxillary fissure
Pterygopalatine fossa
Pterygoid canal
54
Q

Of what bone is the medial pterygoid plate (lamina); what is its approximate location?

A

Sphenoid bone

Medial aspect of the pterygoid processes

55
Q

Of what bone is the hamulus; what is its approximate location?

A

Sphenoid

Hook on the end of the medial pterygoid plate

56
Q

Of what bone is the lateral pterygoid plate; what is its approximate location?

A

Sphenoid bone

Lateral aspect of the pterygoid processes

57
Q

Of what bone is the pterygomaxillary fissure; what is its approximate location?

A

Sphenoid and maxilla

Formed between the anterior surface of the lateral pterygoid plate and the maxilla

58
Q

Of what bone is the pterygopalatine fossa?

A

Pterygoid process of sphenoid

59
Q

Of what bone is the pterygoid canal?

A

Pterygoid process of the sphenoid

60
Q

What are the landmarks/structures associated with the palatine bone?

A
Perpendicular plate
Orbital process
Horizontal plate
Greater palatine foramen
Lesser palatine foramen
61
Q

Of what bone is the greater palatine foramen and what does it transmit?

A

Palatine bone

Greater palatine NAV

62
Q

Of what bone is the lesser palatine foramen and what does it transmit?

A

Palatine bone

Lesser palatine NAV

63
Q

Describe the position of the vomer

A

Sits within the nasal cavity
Upper anterior edge articulates with the perpendicular plate of the ethmoid
Superior edge articulates with the sphenoid
Inferior edge articulates with the maxillae and palatine bones

64
Q

What are the landmarks/structures associated with the ethmoid bone?

A
Crista Galli
Cribriform Plate
Perpendicular Plate
Lateral Masses
Middle/Superior Nasal Conchae
Ethmoid Air Cells
65
Q

Of what bone is the Crista galli and what is its approximate function?

A

Ethmoid bone

Falx cerebri attaches (dura)

66
Q

Of what bone is the cribriform plate and what is its approximate function?

A
Ethmoid
Forms:
Floor of anterior cranial fossa
Narrow root of nasal cavity
Foramina transmits olfactory nerve (CN I)
67
Q

What are the ethmoid air cells and where are they found?

A

Numerous air spaces in the body of the lateral masses

68
Q

What are the structures/landmarks associated with the maxilla?

A
Body
Zygomatic Process
Alveolar Process
Palatine Process
Incisive Foramen
Infraorbital Foramen
Orbital Plate
Frontal Process
Infraorbital Groove
Inferior Orbital Fissure
Anterior Lacrimal Crest
Fossa of the Lacrimal Sac
Nasolacrimal Canal
69
Q

Of what bone is the alveolar process and what is its approximate function?

A

Maxilla

Contains the teeth sockets

70
Q

What is the zygomatic process of the maxilla?

A

Portion of maxilla that extends upward to articulate with the zygomatic bone

71
Q

Describe the palatine process of the maxilla

A

Forms majority of the hard palate

72
Q

Which suture is formed when the left and right palatine processes connect?

A

Median Palatine Suture

73
Q

Of what bone is the incisive foramen; what is its approximate location and what does it transmit?

A

Maxilla
Midline between bones - where palatine Process blend with alveolar process
Transmits Nasopalatine nerve

74
Q

Of what bone is the infraorbital foramen; what does it transmit?

A

Maxilla

Infraorbital NAV

75
Q

What portion of the orbit does the orbital plate from the maxilla form?

A

Large portion of the orbital floor

76
Q

With which bone(s) does the frontal process of the maxilla articulate?

A

Lacrimal bone
Frontal Bone
Nasal bone
Forms part of lateral wall of nasal cavity

77
Q

Describe the infraorbital groove

A

On the floor of orbit and continuous with infraorbital foramen

78
Q

Between which bones is the inferior orbital fissure?

A

Orbital plate of maxilla and greater wing of sphenoid

79
Q

Describe the location of the anterior lacrimal crest of the maxilla

A

Ridge on posterior margin of the frontal process

80
Q

Describe the location of the fossa for the lacrimal sac of the maxilla

A

Bounded by anterior and posterior lacrimal crests

Houses the lacrimal sac

81
Q

Of which bone is the posterior lacrimal crest?

A

Lacrimal bone

82
Q

Of which bone is the anterior lacrimal crest?

A

Maxilla

83
Q

Of what bone is the nasolacrimal canal and what is its function?

A

Maxilla

Houses nasolacrimal duct

84
Q

What are the landmarks/structures associated with the lacrimal bone?

A

Posterior Lacrimal Crest

85
Q

Which bones articulate with the lacrimal bone?

A

Posterior - ethmoid
Anterior/inferior - maxilla
Superior - frontal

86
Q

What are the associated landmarks/structures of the body of the mandible?

A

Alveolar Process
Mental Foramen
Mental spines (genial tubercles)
Mylohyoid line

87
Q

What is the function of the alveolar process of the mandible?

A

Holds roots of teeth

88
Q

Of what bone is the mental foramen and what does it transmit?

A

Mandible

Mental NAV [nerve is branch of mandibular nerve (CN v3)]

89
Q

Of what bone are the mental spines (genial tubercles); what are their approximate locations and function?

A

Mandible
Anterior inner surface - approximately midline
Attachment for geniohyoid, suprahyoid, genioglossus muscles

90
Q

Of what bone is the mylohyoid line; what is its approximate location and function?

A

Mandible
Anterior inner surface of mandible, extends laterally from mental spine
Attachment for mylohyoid muscle

91
Q

What are the landmarks/structures associated with the ramus of the mandible?

A
Angle
Coronoid Process
Condylar Process
Mandibular Foramen
Mandibular Notch
LIngula
92
Q

Describe the location of the angle of the ramus of the mandible

A

Where the body and ramus meet posteriorly

93
Q

Describe the location and function of the coronoid processes of the mandible

A

Anterior triangular projection on superior ramus

Attachment site for temporal muscles

94
Q

What is the location and function of the condylar processes of the mandible?

A

Posterior processes of mandibular ramus

Articulates with mandibular fossa of temporal bone to form the temporomandibular joint

95
Q

Of which bone is the mandibular foramen and what does it transmit?

A

Mandible - medial surface of the ramus

Transmits inferior alveolar NAV

96
Q

Describe the location of the mandibular notch

A

On superior ramus between the coronoid process and the condylar process

97
Q

Of what bone is the lingula; what is its approximate location and function?

A

Mandible
Ridge immediately anterior to mandibular foramen
Attachment site for sphenomandibular ligament

98
Q

Of what facial structure is the zygomatic bone?

A

Cheek bone

99
Q

What landmarks/structures are associated with the zygomatic bone?

A

Orbital plate

Temporal process

100
Q

Which part of the orbit is a contribution of the zygomatic process?

A

Lateral wall and part of the floor of the orbit

101
Q

Of which bone is the temporal process?

A

Zygomatic bone

102
Q

With what does the temporal process articulate?

A

Zygomatic process of the temporal gone forming zygomatic arch

103
Q

List the bone of the nasal septum

A

Ethmoid

Vomer

104
Q

List the bones of the lateral nasal wall

A
Ethmoid
Inferior nasal conchae
Maxilla
Lacrimal
Nasal
Palatine
Medial pterygoid process
105
Q

List the bone of the orbit

A
Frontal
Sphenoid
Zygomatic
Maxilla
Ethmoid
Lacrimal
Palatine
106
Q

List the bones of the hard palate

A

Palatine process of the maxilla

Horizontal process of the palatine

107
Q

Which bones articulate to form the sagittal suture?

A

Parietal bones

108
Q

Which bones articulate to form the coronal suture?

A

Frontal and parietal

109
Q

Which bones articulate to to form the lambdoidal suture?

A

Parietal and occipital bone

110
Q

What is the bregma of the skull?

A

Intersection of sagittal and coronal sutures

111
Q

What replaces the bregma?

A

Anterior fontanelle

112
Q

What is the lambda of the skull?

A

Intersection of the sagittal and lambdoidal sutures

113
Q

What replaces the lambda?

A

Posterior fontanelle

114
Q

What is the asterion of the skull?

A

Junction of temporal, parietal, and occipital bones

115
Q

What replaces the asterion?

A

Posterolateral fontanelle (mastoid fontanelle)

116
Q

Describe the area of the pterion

A

Area where the sphenoid, parietal, temporal, and frontal bones approach each other

117
Q

What replaces the pterion?

A

Anterolateral fontanelle

118
Q

What is the metopic (frontal) suture?

A

Present in the fetus but usually disappears in adult

119
Q

What is the squamosal suture?

A

Articulation between temporal and parietal bone

120
Q

Where are the cranial fossae located?

A

Inside floor of cranial cavity

121
Q

Into how many levels is the cranial cavity divided?

A

Three:
Anterior cranial fossa
Middle cranial fossa
Posterior cranial fossa

122
Q

What divides the anterior cranial fossa from the middle cranial fossa?

A

Sphenoidal ridge of the lesser wing of the sphenoid

123
Q

What bones compose the middle cranial fossa?

A

Greater wing and body of the sphenoid and the temporal bones

124
Q

What separates the posterior cranial fossa from the middle cranial fossa?

A

Superior ridge of the petrous portion of the temporal bone