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ANAT 316 > the bones of the skull > Flashcards

the bones of the skull Flashcards

1
Q

how many bones compose the skull?

A

22

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2
Q

what is protected by the bones that form the neurocranium?

A

the brain

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3
Q

how many bones form the neurocranium?

A

8

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4
Q

what do the bones of the facial skeleton and jaw form?

A

viscerocranium

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5
Q

how many bones compose the viscerocranium

A

12-14

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6
Q

what bone is part of the neurocranium and located centrally where the nose is?

A

ethmoid bone

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7
Q

what bone is part of the neurocranium and located where the forehead is?

A

frontal bone

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8
Q

what bone is part of the neurocranium and located on the top left and right side of the head?

A

parietal bone

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9
Q

what bone is part of the neurocranium and located at the back of the skull?

A

occipital bone

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10
Q

what bone is part of the neurocranium and located just above the year on either side?

A

temporal bone

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11
Q

what bone is part of the neurocranium and transverses from the right to left side?

A

saphenoid bone

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12
Q

what joint alligns the frontal bone with the right and left parietal bone?

A

coronal suture

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13
Q

what is fused by the sagittal sututre?

A

fusion of the right and left parietal bones

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14
Q

what suture fuses each parietal bone to the occipital bones (on either side)

A

lambdoid sututre

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15
Q

what is the name of the point where the sagittal sutrure meets the lambdoid suture on the posterior skull?

A

lambda

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16
Q

whats is the weakest point of the lateral skull? what is it composed of?

A

ptierion

Where sphenoid, frontal, parietal & temporal bones meet

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17
Q

what is the other name given to identify the skull cap?

A

the calavria

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18
Q

what are fontanelle?

A

soft sports in neonatal skulls

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19
Q

when do fontanelles normally close?

A

within the first year of life

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20
Q

how is the angle of the jaw in the neonatal skull?

A

obtuse angle

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21
Q

how is the mastoid process in neonatal skull?

A

underdevelopped

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22
Q

wht is the issue with the mastoid process in neonatal skulls?

A

due to it being underdeveloped, it may lead to fascial nerve palsy as the nerve is not protected by the process.
occurs in delivery with forcesp

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23
Q

what bones of the skull are contained by the anterior cranial fossa?

A
  • frontal bone
  • ethmoid bone
  • lesser wing of the saphenoid bone
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24
Q

what bone contributes to the orbit plate ans serves as a roof for the eye socket?

A

frontal bone

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25
Q

what does the ethmoid bone contribute to?

A

in majority it contributes to the nasal wall cavity and to the medial wall of the orbit

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26
Q

what does the cribiform foramina allow the passage of?

A

the nerves to the nose

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27
Q

what is the crista galli?

A

serves as a point of attachment to the meninges

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28
Q

what part of the lesser wing of the saphenoid bone is part of the anterior cranial foramina?

A

the superior part

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29
Q

what part of the ethmoid bone is located between the anterior cranial wall and the nasal cavity?

A

cribiform plate

30
Q

what bones compose the middle cranial fossa

A

saphenoid bone

temporal bones

31
Q

what part of the saphenoid bone is located where the pituitary gland sits?

A

hypophyseal f

32
Q

what part of the saphenoid bone is considered as the back (saddle) shape depression in the back of the saphenoid bone?

A

sella turcica

33
Q

what part of the themporal bone forms the lateral skull?

A

squamous

34
Q

how could the squamous be described?

A

as the flat portion of the temporal bone

35
Q

what forms the tympanic portion of the temporal bone and forms the external ear?

A

the squamous

36
Q

what part of the temporal bone contains part of the middle and inner ear

A

the pertrous portion

37
Q

how can the petrous portion of the temporal bone be described?

A

thicker, rocky looking bone

38
Q

what does the pterygoid process give rise to?

A

lateral and medial pterygoid processes

39
Q

where are the pterygoid processes found relative to the saphenoid bone?

A

on either side of it

40
Q

what are the foramen that form the middle cranial fossa?

A

foramen rotundum
foramen ovale
foramen spinosum

41
Q

through what foramen does the middle meningeal A pass through?

A

foramen spinosum

42
Q

what foramen serves as an opening for the cartoid canal

A

foramina lacerum

43
Q

what A passes through the cartoid canal and has a tortuous struture?

A

internal cartoid A

44
Q

what is the foramina that leads to the orbits?

A

optic canals

45
Q

what is the opening at the top of the orbit where the eyes sit ans through where nerves to get tot the eyes sit?

A

superior orbital fissuew

46
Q

what components form the posterior cranial foramen?

A 
-petrous portion of the temporal bone
occipital bone
foramen magnum
internal accoustic meatus
-jugular foramen
-hypoglosseal foramen
47
Q

what serves as the opening for the spinal cord in the posterior cranial forman?

A

foramen magnum

48
Q

Where do nerves responsible for hearing and balance enter the inner ear?

A

petrious portion of the temporal bone

49
Q

in what are the nerves responsible for hearing located?

A

internal accoustic meatus

50
Q

what components are found within the jugular forman?

A

internal jugular V and cranial N

51
Q

what is found in the hypoglosseal foramen?

A

nerves for the innervation of the tongue

52
Q

where does the styloid process of the skull originate from?

A

from the temporal bone

53
Q

what gives rise to the M/L pterygoid plates?

A

pterygoid process

54
Q

what bones form the hard palate?

A

palatine bones and the palatine process of the maxilla

55
Q

what structure transition into the lateral wall of the skull (squamous)?

A

petrous plate

56
Q

Into what does the cartoid Artery come in dives 90 degrees, passes through, another 90 degrees into foramen lacerum?

A

cartoid Canal

57
Q

what structure can be onserved only at the base of the skull and is found between the mastoid and styloid process?

A

sytlyomastoid forman

58
Q

what does the palatine process form?

A

the roof of the mouth

59
Q

what is the name of the bones that form the upper jaw found on the R/L sides?

A

maxilla

60
Q

what is the name given to the cheek bones?

A

zygomatic bones

61
Q

what is the zygomatic arch?

A

the Fusion of the temporal process of the zygomatic bone & the zygomatic process of the temporal bone

62
Q

what boney structure do the tear ducts travel through?

A

lacrimal bone

63
Q

what is the name given to the bone of the lower jaw?

A

mandible bone

64
Q

what is the name of the thickened ridge that provides socket for tooth in the mandible?

A

alveolar process

65
Q

what is formed by the vomer bone?

A

inferior nasal septum

66
Q

how many nasal bone(s) are there?

A

2

67
Q

what type of joint is the temporomandibular joint?

A

modified hinge joint

68
Q

what articulates in the temporomandibular joint?

A

o Head of the mandible articulates with the mandibular fossa in the temporal bone

69
Q

how is the temporomandibular joint reinforced?

A

by lateral ligaments

70
Q

how is the mandible head positioned when the temporomandibular joint is in closed position?

A

the head is in the mandibular fossa

71
Q

how is the mandible head positioned when the temporomandibular joint is in open position?

A

depression of the mandible causes the mandible head to shift forward and rest on the atricular tubercle

ANAT 316 (22 decks)

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