facial skeleton Flashcards

1
Q

what is the posterior nares (choanae)?

A
  • the posterior opening of the nasal cavities
  • opens into the nasopharynx
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2
Q

what does the zygomatic arch separate?

A
  • it separates 2 fossae of the cranium - the temporal and infratemporal fossa
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3
Q

what is the temporal fossa?

A
  • contains the temporalis muscle
  • contains vessels & nerves
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4
Q

what is the infratemporal fossa?

A
  • it contains the coronoid process of mandible
  • located underneath temporal fossa
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5
Q

what are fossae?

A

a depression or hollow

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6
Q

what are fossae?

A

a depression or hollow

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7
Q

what are fissures?

A

an open split in a bone that allows for the passage of vessels and nerves

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8
Q

what is the** inferior orbital fissure**?

A
  • a fissure located between the sphenoid bone and the maxilla
  • it opens into the posterolateral aspect of the orbital floor and allows the passage of several neurovascular structures
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9
Q

what is the pterygomaxillary fissure?

A
  • a fissure where the foramen rotundum opens up
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10
Q

what are the 14 bones of the face?

A
  • nasal (2)
  • maxillae (2)
  • palatine (2)
  • lacrimal (2)
  • inferior nasal concha (2)
  • zygomatic (2)
  • vomer
  • mandible
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11
Q

what is the nasal bone?

how many are there? what do they articulate with?

A
  • there are 2 nasal bones
  • they form the nose
  • they articulate (join) with the frontal bone (superiorly), each other medially, maxilla laterally, ethmoid posteriorly
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12
Q

what forms the ‘structural’ part of the** nose**?

A

cartilage

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13
Q

what does the maxilla form?

A
  • forms the floor of the orbit
  • forms most of nasal opening (aperture)
  • forms the floor of the nasal cavity
  • forms most of the hard palate
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14
Q

what does the maxilla articulate with?

A
  • frontal bone
  • sphenoid bone
  • ethmoid bone
  • nasal bone
  • inferior nasal concha
  • palatine bone & lacrimal bone
  • vomer
  • zygomatic
  • each maxilla (paired) articulate with eachother
    LACRIMAL
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15
Q

what does the palatine bone form?

A
  • part of the floor of the orbit
  • part of lateral wall and floor of nasal cavity
  • **posterior of hard palate **(ie the roof of oral cavity)

NOTE: almost never found isolated - tightly bound to maxillae and sphenoid bone

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16
Q

what does the lacrimal bone form?

note lacrima = tears

A
  • the lacrimal bone forms the medial walls of the orbits
  • also contributes to lateral wall of nasal cavity
17
Q

what is the **function **of the paired nasal conchae?

A
  • they have a function in olfaction & humidifying inhaled air
18
Q

what bone are the superior and middle nasal conchae part of?

A
  • the ethmoid bone
19
Q

what does the zygomatic bone form?

A
  • forms part of the cheek and lateral eye socket
20
Q

what is the zygomatic arch?

A

the zygomatic bone + the temporal bone

21
Q

what does the zygomatic bone articulate with?

A
  • frontal bone
  • maxilla
  • sphenoid bone
  • temporal bone

note NB -** zygomatic process** of the maxilla, frontal, zygomatic and temporal bone

22
Q

what is the vomer?

A
  • a midline bone that forms the posterioinferior part of the nasal septum
  • it divides the nasal cavity
23
Q

what bone is the anterosuperior part of the nasal septum?

A

the ethmoid bone (perpendicular plate of)

24
Q

what is the** function of the mandible**?

A
  • hold roots for lower teeth
  • masitication
  • opens mouth up
25
Q

how is the mandible connected to the skull?

A

via the temporomandibular joint (TMJ)

26
Q

what are the features (parts) of the mandible?

A
  • body of mandible
  • ramus of mandible
  • coronoid process
  • mandibular condyles
27
Q

what are the 7 bones of the orbit?

A
  • frontal bone
  • maxilla
  • zygomatic bone
  • sphenoid bone
  • lacrimal bone
  • ethmoid bone
  • palatine bone (tiny)