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Anatomy 3 > Topic 3A - OS TEMPORALE + OS PARIETALE > Flashcards

Topic 3A - OS TEMPORALE + OS PARIETALE Flashcards

1
Q

What does the os temporale form?

A

the lateral part of the neurocranium

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2
Q

what does the os parietale form?

A

the dorsal part of the neurocranium

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3
Q

What are the 3 parts of the os temporale?

A 
pars squamosa
pars petrosa (caudoventral part)
pars tympanica (base)
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4
Q

What separates the os temporal from the os occipital in Eq and Ru?

A

Fissura petroccipitalis

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5
Q

In which species is the os temporale joined to the os occipital and with what?

A

Ca, by the sutura occipitotympanica

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6
Q

List the facies of pars squamosa?

A

facies cerebralis and facies temporalis (outside)

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7
Q

What does facies cerebralis present?

A

sulci arteriosi et venosi
impressiones digitatae
juga cerebrallis
crista tentorica (small Ru)

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8
Q

What does the facies temporalis of pars squamosa os temporale present?

A 
proc. Zygomaticus
tuberculum articulare
fossa mandibularis
proc. retroarticularis
foramen retroarticulare
proc. occipitalis
proc. retrotympanica
meatus temporalis
fossa temporalis
crista temporalis
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9
Q

What species does not have tuberculum articulare?

A

Ca

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10
Q

Which structure forms the mandibular joint?

A

tuberculum articulare

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11
Q

What does pars petrosa enclose?

A

inner ear

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12
Q

What perforated the medial surface of pars petrosa?

A

porus acusticus internus

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13
Q

What are the 3 areas of the porus acusticus internus?

A

area n. facialis
area cochlear
area vestibularis dorsalis + ventralis

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14
Q

What does area cochlear act as a passage for?

A

the cochlear branches of N. Vestibulocochlearis (cranial nerve VIII)

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15
Q

What does area vestibularis dorsalis and ventralis act as a passage for?

A

the vestibular branches of N. Vestibulocochlearis (cranial nerve VIII)

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16
Q

What does the ventral surface of the pars petrosa present?

A

promontorium
fenestra vestibuli (ovale)
fenestra cochlea (rotundum)
crista partis petrosae

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17
Q

What species is crista partis petrosae present in and what does it do?

A

Ca and Eq

it separates the rost + med surfaces of pars petrosa

18
Q

What are the structures of pars petrosa?

A

porus acusticus internus
proc. mastoideus
proc. styloideus
canalis facialis

19
Q

what species is proc. mastoideus not present in?

A

Su

20
Q

Describe the proc. mastoideus in the relevant species?

A

Bo - low ridge
Eq - tuberosity
Small Ru - roughened area

21
Q

what species is proc. styloideus present in and what is its function?

A

Ru and Eq

attachment of hyoid

22
Q

where does the canalis facialis end?

A

foramen stylomastiodeum ( n.facialis VII )

23
Q

describe the canalis facialis in Ca?

A

it is between proc. mastoideus and tympanica

24
Q

describe the canalis facialis in Eq and Ru?

A

it is between proc. mastoideus and proc. styloideus

25
Q

what are the structures of pars tympanica?

A 
bulla tympanica
meatus acusticus externa
vagina proc. styloidei
proc. muscularis
fissura petrotympanica
pars ossea tubae auditivae
canalis musculotubarius
26
Q

where does the meatus acusticus externa open?

A

porus acusticus externus

27
Q

what species is the vagina proc. styloidei present in?

A

Eq and Bo

28
Q

describe the proc. muscularis in the relevant species

A

it projects rostoventrally from bulla
ca + su - short thorn
eq - long rod
bo - broad base

29
Q

what species is the septum bullae present in?

A

ca

30
Q

the pars ossea tubae auditivae is a connection between?

A

cavum tympani and pharynx

31
Q

canalis musculotubarius consists of?

A

semicanalis tubae auditivae
semicanalis m. tensor tympanii
septum canalis musculotubarii

32
Q

what is the external surface of os parietale made up of?

A 
planum temporale (lateral sides)
planum parietale (dorsal)
33
Q

what is the name of the planum parietale in Ru?

A

planum nuchae

34
Q

what are the structures of os parietale?

A 
planum temporale and parietale (nuchae in Ru)
linea temporalis
crista sagittalis externa
crista sagittalis interna
proc. tentoricus
tentorium cerebelli osseum
35
Q

in what species is the crista sagittalis externa present in?

A

eq and ca

36
Q

in what species is the crista sagittalis interna present in?

A

bo and su

37
Q

the tentorium cerebelli osseum is formed from?

A

proc. tentoricus of os parietale, interparietale and occipitale

38
Q

what species is the proc. tentoricus in?

A

eq and ca

39
Q

what are the structures of the os interparietale ?

A 
linea temporalis
crista sagittalis externa
proc. tentoricus
eminentia cruciformis
canalis sinus transversii
40
Q

what is the os interparietale?

A

paired bones fused by sutura sagittalis

41
Q

where is the os interparietale located?

A

in the median plane between os parietale and os occipital

42
Q

what species is the eminentia cruciformis present in?

A

Ru instead of osseus tentorium

Anatomy 3 (65 decks)

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