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ANAT1119 - Orofacial Anatomy I > CH26 - Osteology of the Skull > Flashcards

CH26 - Osteology of the Skull Flashcards

Week 9

1
Q

Function of bones of the skull

A
  • Surround the brain
  • Protect the brain from injury
  • Form the facial skeleton
  • Participate in growth of jaw
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2
Q

How many bones are in the skull?

A

22 bones

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3
Q

Joining of 2 or more lesions

A

Suture

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4
Q

Hole or opening in bone

A

Foramen

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5
Q

Tubelike opening through bone

A

Canal

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6
Q

How many neurocranium bones (brain)

A

8 bones

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7
Q

Name the 8 bones of the neurocranium

A
  • Frontal bone (single)
  • Sphenoid bone (single)
  • Ethmoid bone (single)
  • Occipital bone (single)
  • Temporal bones (paired)
  • Parietal bones (paired)
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8
Q

How many viscerocranium bones (facial)

A

14 bones

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9
Q

Name the 14 bones of the viscerocranium

A
  • Mandible (single)
  • Vomer (single)
  • Nasal bones (paired)
  • Lacrimal bones (paired)
  • Zygomatic bones (paired)
  • Inferior nasal conchae (paired)
  • Palatine bones (paired)
  • Maxillae (paired)
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10
Q

Area forms the eyes to the top of the skull

A

Frontal bone

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11
Q

Area below the eyes to the
occlusal plane

A

Paired zygomatic bones & paired maxillae

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12
Q

Form the bridge of the nose, & the lower jaw

A

Paired nasal bones; mandible

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13
Q

Forms inner (medial) corner of the eye cavity (orbit)

A

Small lacrimal bone

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14
Q

Septal cartilage, vomer, & the perpendicular plate of the
ethmoid bone

A

Vertical nasal septum

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15
Q

Found in the lower, lateral portions of the nasal cavity

A

Inferior nasal conchae

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16
Q

Orbital portion of the lesser and greater wings of the sphenoid forms the

A

Superior orbital fissure

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17
Q

Roof of orbit is formed by the ___ of the frontal bone

A

Orbital plate

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18
Q

Name 3 sutures

A
  • Coronal suture
  • Squamous suture
  • Lambdoid suture (ā€œVā€)
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19
Q

Name 3 processes

A
  • Mastoid process
  • Zygomatic process
  • Styloid process
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20
Q

Projection on temporal bone-behind external auditory meatus

A

Mastoid process

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21
Q

Temporal bone and temporal process of zygomatic bone-make up zygomatic arch

A

Zygomatic process

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22
Q

The attachment of muscles and ligaments of the neck

A

Styloid process

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23
Q

3 things seen in the palatal regions

A
  • Incisive foramen
  • Median palatine suture
  • Transverse palatine/ palatomaxillary suture
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24
Q

5 things seen in the posterolateral portion of hard palate

A
  • Greater palatine foramen
  • Lesser palatine foramen
  • Pterygoid hamuli
  • Lateral pterygoid plates
  • Pterygoid fossa
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25
In the sphenoid bone, transmits the 5th cranial nerve to the lower jaw
Foramen ovale
26
Posterior to foramen oval, transmits middle meningeal artery
Foramen spinosum
27
Openings for internal carotid arteries, posterior to foramen ovale & spinosum
Carotid canals
28
Opening in floor of carotid canal, filled with cartilage
Foramen lacerum
29
Junction of the sphenoid bone & occipital bone
Spheno-occipital synchondrosis
30
Opening for facial nerve (cranial nerve VII)
Stylomastoid foramina, styloid processes, mastoid processes
31
Passageway for olfactory nerve from nasal cavity to brain
Cribriform plate
32
Greater and lesser wings of the sphenoid bone are behind the
Ethmoid bone
33
Houses frontal lobe of brain, anterior to the frontal bone
Anterior cranial fossa
34
Depression in the sphenoid, home to the pituitary gland
Hypophyseal fossa
35
Where nerves to mand/max teeth pass out of skull
Foramen ovale & foramen rotundum
36
Large opening in occipital bone toward the posterior of skull
Foramen magnum
37
Lateral to foramen magnum
Jugular foramen & internal acoustic meatus
38
Houses the temporal lobe of brain
Middle cranial fossa
39
Houses brainstem and cerebellum
Posterior cranial fossa
40
Bones that surround the brain
Neurocranium
41
Bones that don't surround the brain; has to do with respiratory/digestive functions
Viscerocranium
42
Neurocranium bones that cover outside of the brain
- Frontal - Parietal - Temporal - Occipital
43
Neurocranium bones that cover inferior portion of the brain
- Ethmoid - Sphenoid
44
Composed of the body, greater and lesser wings, and paired pterygoid processes
Sphenoid
45
Thin walls of bone that project backward
Medial & lateral pterygoid plates
46
Projects down from the medial pterygoid plate
Hamulus (hamular process)
47
Viscerocranium bones that support the respiratory opening & eye socket
- Nasal bones - Vomer - Lacrimal bones - Zygomatic and inferior nasal conchae
48
Viscerocranium bones that support the masticatory system
- Maxillae - Palatine bones - Mandible
49
Maxillary projection that meets the frontal bone
Frontal process
50
Maxillary projection that meets the zygomatic bone
Zygomatic process
51
Forms the sockets for the upper teeth
Alveolar process
52
Forms most of the hard palate
Horizontal palatine process
53
Infection can spread to the sinuses from teeth & to teeth from the sinuses- bidirectional
Maxillary sinuses
54
Behind third molar, area where blood vessels & nerves enter bone, also where most maxillary growth happens
Maxillary tuberosity
55
3 parts of the Mandible
- Horizontal body - Alveolar process - Ramus
56
Tip of chin
Mental protuberance
57
Pathway for the mental blood vessels & nerves for the lower lip & chin
Mental foramen
58
Point where the inferior border of the mandible turns upward; divides the body & the ramus
Mandibular angle
59
Articulates with temporal bone
Mandibular condyle
60
Slightly narrowed area just beneath the condyle
Condylar neck
61
Depression in the ramus
Coronoid/Mandibular notch
62
Attachment for muscles of mastication
Coronoid process
63
Anterior border of the ramus
External oblique line
64
Midway up the ramus; where nerves & blood vessels for lower teeth & lip enter
Mandibular foramen
65
Attachment for mylohyoid muscle; in front of the foramen & running forward & down
Mylohyoid line
66
Allows passage for mylohyoid nerve & vessels
Mylohyoid groove
67
Depressions in bone where salivary glands are
Sublingual and submandibular fossae
68
Area right behind the third molars
Retromolar triangle
69
Attachments for muscles that aid in tongue movement/swallowing
Superior & inferior genial tubercles or mental spines
70
Points of attachment for anterior digastric muscle
Digastric fossae
71
Projection of bone that partially covers the opening of the mandibular foramen; point of attachment for sphenomandibular ligament
Lingula

ANAT1119 - Orofacial Anatomy I (8 decks)

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