Skull anatomy Flashcards

1
Q

How many cranial bones are there? Name them.

A

8, parietla, temporal, occipital, frontal, sphenoid, ethmoid

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2
Q

How many facial bones are there? Name them

A

14, Mandible, maxillary(2), lacrimal(2), zygomatic(2), nasal(2), Palatine(2), Vomer, inferior nasal conchae(2)

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3
Q

Name the cranial sutures.

A

Coronal, sagittal, parietal, temporal

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4
Q

What are the 2 portions of the frontal bone? What do they form?

A

Squamous - forms forehead
Orbital- forms superior part of orbit

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5
Q

What other bones does the frontal bone articulate with?

A

Parietal, sphenoid, ethmoid, and lacrimal

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6
Q

What is the parietal eminence?

A

Widest part of skull

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7
Q

What other bones does the parietal bone articulate with?

A

Every cranial bone except ethmoid

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8
Q

Name the parts of the occipital bone.

A

squama, External occipital protuberence(inion), occipital condyle, basilar portion,

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9
Q

What is the clivus?

A

Support structure for pons

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10
Q

What passes through the foramen magnum?

A

Medulla oblongata, spinal cord

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11
Q

What other bones does the occipital bone articulate with?

A

Parietal, sphenoid, temporal

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12
Q

What are the parts of the ethmoid bone?

A

Horizontal plate, olfactory foramina, crisia galli

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13
Q

Which bone contains the ethmoidal notch where the ethmoid fits into?

A

Frontal bone

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14
Q

What is the crista galli?

A

Point of attachment for folx cerebri

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15
Q

Where are the ethmoidal sinuses located?

A

Labrynths

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16
Q

What bones does the ethmoid articulate with?

A

Frontal and sphenoid

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17
Q

Name the parts of the sphenoid bone.

A

Greater wing, lesser wing, body

18
Q

What sits within the sella turcica?

A

Pituitary gland

19
Q

Name the parts of the sella turcica.

A

Dorsum sellae, Tuberculum sellae, anterior+posterior clinoid processes

20
Q

Which part of the sphenoid bone contain the foramen rotundum, ovale, and spinosum?

A

Greater wing

21
Q

Which bones does the sphenoid bone articulate with?

A

Every cranial bone

22
Q

Where is the temporal bone located?

A

Side of base of skull

23
Q

What are the parts of the temporal bone?

A

squamous, mastoid, tympanic, styloid, zygomatic

24
Q

What is the thickest and densest bony structure of the cranium? Where is it located?

A

Petrous portion, contains all organs of hearing and balance

25
EAM
External auditory meatus
26
IPL
inter pupitary line
27
GML
Glabellomeatal line
28
OML
orbital meatal line
29
IOML
Infra orbital meatal line
30
AML
Acanthiomeatal line
31
MML
mentomeatal line
32
How many degrees difference is there between the OML and IOML?
7 degrees
33
Explain the difference between the Mesocephalic, brachycephalic, and dolichocephalic skulls. What are the degrees difference between the petrous ridges and MSP for each?
Mesocephalic= average skull shape, petrous ridges 47 degress to msp Brachycephalic= broader side to side, shorter front to back, more shallow on inside, 54 degree angle between petrous ridges and msp dolichocephalic= 40 degree angle between petrous ridges and msp, increased anterior and posterior diameter
34
Outer canthus
outer edge of eye
35
Infraorbital margin
bottom of orbit
36
Inner canthus
inside of eye
37
Nasion
Nasal bone articulates with frontal bone
38
Glabella
Flat part between eye brows
39
Acanthion
Tip of anterior nasal spine
40
Gonion
Angle of mandible
41
Mental point
Anterior portion of mandible