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Anatomy > Skull > Flashcards

Skull Flashcards

1
Q

divisons of the skull

A

neurocranium and viserocranium

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2
Q

skull is made up of which kind of bones

A

flat bones

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3
Q

forms the shape of the head and to protect the brain and the organs that control the five senses

A

neurocranium (8 bones)

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4
Q

bones of the neurocranium include

A 
fontal (1)
parietal (2) 
occipital  (1)
temporal (2) 
sphenoid  (1)
ethmoid (1)
*remember STEP OF
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5
Q

forms the skeleton of the face as well as parts of the jaw

A

viscerocranium (14 bones)

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6
Q

bones of the viscerocranium include

A 
zygomatic (2)
maxillae (2)
nasal (2)
lacrimal (2)
vomer (1)
palatine (2)
inferior conchae (2)
mandible (1)
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7
Q

how many bones in total form the skull

A

28

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8
Q

roof of skull

A

located in neurocranium called calvaria

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9
Q

spongy cancellous bone separating the inner and outer layers of the cortical bone of the skull contains bone marrow

A

diploë

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10
Q

immovable joints forming boundaries between skull bones

A

sutures of the skull

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11
Q

sutures of the skull

A

fibrous joints made up of collagen with no cavity also known as synarthrosis

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12
Q

how many sutures are in the skull

A 
21 in total 
5 anterior 
3 posterior 
2 superior 
5 lateral 
6 inferior
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13
Q

main sutures of the skull

A

sagittal coronal squamosal lambdoidal sutural

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14
Q

suture between the two parietal bones

A

sagittal suture

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15
Q

suture between the the frontal and parietal bones

A

coronal suture ( frontal suture )

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16
Q

suture between parietal and temporal bones

A

squamosal suture

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17
Q

suture between parietal and occipital bones

A

lambdoidal suture

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18
Q

pterion

A

region where the frontal parietal temporal and sphenoid bones join together anterior inferior corner of parietal bone articulates with the greater wing of the sphenoid

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19
Q

thinnest part of lateral walls of skull

A

pterion

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20
Q

overlies the middle meningeal artery and vein

A

pterion

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21
Q

provide attachment for head and neck muscles

A

cranial bones

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22
Q

anchor the muscles of the face

A

facial bones

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23
Q

wormian bones

A

also known as intrasutural bones or sutural bones, are extra bone pieces that can occur within a suture (joint) in the skull usually found in lambdoidal suture

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24
Q

provides for passage of a sensory nerve to the skin of the forehead

A

supraorbital foramen

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25
Q

below the orbit point of emergence for a sensory nerve that supplies the anterior face below the orbit.

A

infraorbital foramen

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26
Q

contain muscle that act on the jaw

A

temporal fossa and infratemporal

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27
Q

floor of brain is also known as

A

base of the skull

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28
Q

three large spaces located in base of skull

A

anterior middle and posterior cranial fossa

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29
Q

depth of cranial fossa increase from

A

front to back anterior the smallest posterior the largest

30
Q

along the attached margin of the falx cerebri. It allows blood to drain from the lateral aspects of anterior cerebral hemispheres to the confluence of sinuses

A

superior sagittal sinus

31
Q

what separates the anterior and middle fossa

A

lesser wing of the sphenoid

32
Q

what separates the middle and posterior fossa

A

petrous part of temporal lobe

33
Q

anterior fossa midline is a crest for the attachment of

A

falx cerebri

34
Q

gives attachment for tentorium cerebelli

A

medial end of the lesser wing of the sphenoid which forms anterior crinoid process

35
Q

anterior fossa contains

A

anterior ethmoidal nerve

olfactory nerves

36
Q

depression in the floor of the cranial base which houses the projecting frontal lobes of the brain.

A

anterior cranial fossa

37
Q

butterfly-shaped depression of the skull base, which is narrow in the middle and wider laterally houses the temporal lobes of the cerebrum

A

middle cranial fossa

38
Q

pituitary gland is located in which fossa

A

middle cranial fossa

39
Q

foramen

A

an opening hole or passage in bone

40
Q

optic canals are located in

A

anterior of middle cranial fossa

41
Q

contents of optic canal

A

transmit the optic nerves (CN II) and ophthalmic arteries into the orbital cavities

42
Q

lateral to the central part of the middle cranial fossa are four foramina of the sphenoid bone

A

superior orbital fissure
foramen rotunda
foramen ovale
foramen spinosum

43
Q

contents of superior orbital fissure

A
  • oculomotor nerve (CN 3)
  • trochlear nerve (CN 4)
  • ophthalmic branch of the trigeminal nerve (CN V1)
  • abducens nerve (CN 6)
  • opthalmic veins and sympathetic fibres.
44
Q

contents of foramen rotunda

A

opens into the pterygopalatine fossa and transmits maxillary branch of the trigeminal nerve (CN V2)

45
Q

contents of foramen ovale

A

opens into the infratemporal fossa, transmitting the mandibular branch of the trigeminal nerve (CN V3) and accessory meningeal artery

46
Q

contents of foramen spinosum

A

opens into the infratemporal fossa. It transmits the middle meningeal artery, middle meningeal vein and a meningeal branch of CN V3

47
Q

foramen of the temporal lobe include

A
  • hiatus of the greater petrosal nerve
  • hiatus of the lesser petrosal nerve
  • carotid canal
48
Q

between petrous part of temporal and sphenoid

A

foramen lacerum

49
Q

contents of foramen lacerum

A

internal carotid artery

50
Q

located posteriorly and medially to the foramen ovale

A

carotid canal

51
Q

internal acoustic meatus is located in

A

medial wall of the petrous ridge in the posterior cranial fossa

52
Q

foramen of posterior cranial fossa

A
  • foramen magnum
  • hypoglossal canal
  • jugular foramen
  • internal acoustic meatus
53
Q

foramen magnum

A

located in occipital contains medulla oblongata spinal part of accessory nerve and right and left vertebral arteries

54
Q

hypoglossal canal

A

located in occipital transmits hypoglossal nerve

55
Q

jugular foramen

A

located in petrous part of temporal and condylar part of occipital contain glossopharyngeal vagus accessory nerve sigmoid sinus which becomes internal jugular vein

56
Q

internal acoustic meatus

A

contains vestibulocochlear and facial nerves

57
Q

differences between adult skull and neonatal skull

A
  • neonatal skull has a larger cranium to face ratio
  • bones of the neonatal skull are unilmaninar
  • neonatal skull does not contain diploë
58
Q

allows neonatal brain to grow

A

fontanelles

59
Q

fontanelles

A

unossified membranes

60
Q

when do the fontanelles ossify

A

after 24 months

61
Q

bones of vault are ossified in

A

membrane

62
Q

bones of base are ossified in

A

cartilage

63
Q

anterior fontanelle closes when

A

also known as bregma closes in about 18 months after birth

64
Q

posterior fontanelle closes when

A

also known as lambda closes in about 6 months after birth

65
Q

superior aspect

A

norma verticalis

66
Q

anterior aspect

A

norma frontalis

67
Q

lateral aspect

A

norma lateralis

68
Q

posterior aspect

A

norma occipitalis

69
Q

inferior aspect (skull base) from outside

A

norma basalis externa

70
Q

inferior aspect (skull base) from inside.

A

norma basalis interna

Anatomy (9 decks)

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