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Veterinary Anatomy III > THRA.1 > Flashcards

THRA.1 Flashcards

1
Q

Give the Main Constituents of the Topic: “Bones of the Base of the Neurocranium”

A
  • Presphenoid Bone
  • Basisphenoid Bone
  • Ethmoid Bone
  • Squamous Part of the Temporal Bone
  • Basal Part of the Occipital Bone
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2
Q

Give the key small components of the Topic: “Bones of the Base of the Neurocranium”

A
  1. Fossa cranii rostralis
  2. Fossa cranii media
  3. Fossa cranii caudalis
  4. Foramen Lacerum
  5. Foramen ovale
  6. Foramen Caroticum
  7. Fissura petrooccipitalis
  8. Foramen Jugulare
  9. Tuberculum musculare
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3
Q

Give the structures of the corpus ossis praesphenoidalis

A
  1. Jugum Sphenoidale
  2. Sulcus Chiasmatis
  3. Sulcus nervi optici
  4. Rostrum ossis sphenoidalis
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4
Q

Jugum sphenoidale

A

The flat bony plate covering the chiasma opticum

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5
Q

Sulcus chiasmatis

A

One of two sites where the optic nerves (fasciculi optici) (CN-II) leave the neurocranium (as well as the sulcus nervi optici).

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6
Q

Sulcus nervi optici

A

One of two sites where the optic nerves (fasciculi optici) (CN-II) leave the neurocranium (as well as the sulcus chiasmatis).

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7
Q

Rostrum ossis sphenoidalis

A

At the base of the seperation of the two ethmoidal fossae

Contains: crista sphenoidalis

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8
Q

What is the attachment site of lamina perpendicularis

A

Crista sphenoidalis

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9
Q

Give the structures of the alae ossis praesphenoidalis

A
  1. Processus clinoideus rostralis
  2. Foramen opticum
  3. Fissura orbitalis
  4. Foramen rotundum
  5. Foramen trochleare (Eq. Only)
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10
Q

Where is processus clinoideus rostralis located?

A

On the caudal border of the alae ossis praesphenoidalis

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11
Q

Which structure(s) pass through foramen opticum?

A

Fasciculus opticus (CN-II)

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12
Q

Which structure(s) pass through fissura orbitalis?

A
  • n. ophthalmicus (CN-V1)
  • n. oculomotorius (CN-III)
  • n. abducens (CN-VI)
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13
Q

Which structure(s) pass through foramen rotundum?

A
  • n. maxillaris (CN-V2)
  • ​n. throchlearis (CN-IV) ØEq
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14
Q

Which structure(s) pass through foramen throchleare?

A

n. trochlearis (CN-IV) (Eq Only)

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15
Q

Fissura orbitalis & foramen rotundum combine to form which structure, in which species?

A

Ru/Su

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16
Q

Give the constituents of os basisphenoidale

A
  • Corpus ossis basisphenoidalis
  • Alae ossis basisphenoidalis
  • Processi pterygoidei
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17
Q

Give the structures of the corpus ossis basisphenoidalis

A
  1. Fossa hypophysialis
  2. Dorsum sellae turcicae (ØEq)
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18
Q

Fossa hypophysialis

A

Located at the centre of sella turcica

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19
Q

Dorsum sellae turcicae

A

Marks the ventral division between the cerebrum and the cerebellum

Has processi clinoidei caudalis

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20
Q

Give the constituents of alae ossis basisphenoidalis

A
  1. Sulcus nervi maxillaris
  2. Sulcus nervi ophthalmici
  3. Spina ossis sphenoidalis
  4. Fossae piriformis
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21
Q

Sulcus nervi maxillaris

A

Contains CN-V2

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22
Q

Sulcus nervi ophthalmici

A

Contains (CN-V1)

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23
Q

Spina ossis sphenoidalis

A

Lateral to:

  • Suclus nervi maxillaris
  • Sulcus nervi ophthalmici
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24
Q

Fossae piriformis

A

Most lateral structures of the alae ossis basisphenoidalis

Support the cerebral piriform lobes

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25
Q

Processi pterygoidei

A

Caudoventrally pointed processes

Continue rostrally to form the cristae pterygoideae (ØCa)

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26
Q

Give the constituents of processi pterygoidei

A
  1. Foramen alare rostrale
  2. Foramen alare caudale
  3. Canalis alaris (ØRu)
  4. Foramen alare parvum (Eq Only)
  5. Canalis pterygoideus
  6. Sulcus n. canalis pterygoidei
27
Q

Foramen alare rostrale et caudale forms…

A

Canalis alaris (ØRu)

28
Q

Which structure(s) pass through canalis alaris?

A

Maxillary artery

29
Q

Which structure(s) pass through Foramen alare parvum

A

Rostral deep temporal artery

30
Q

Canalis pterygoideus

A

Located on the ventral aspect of processi pterygoidei

31
Q

Sulcus n. canalis pterygoidei

A

Located on the ventral aspect of processi pterygoidei

32
Q

Give the constituents of os ethmoidale

A
  1. Lamina cribrosa
  2. Fossae ethmoidales
  3. Crista galli
33
Q

Give the constituents of os temporale pars squamosa

A
  1. Foramen retroarticulare
  2. Processus retroarticularis
  3. Canalis musculotabarius
34
Q

Foramen retroarticulare

A

Located caudal to the processus retroarticularis

Contains emissary veins for the temporal sinus

35
Q

Canalis musculotubarius

A

In Ca: Lateral to the foramen caroticum

In Ru: Caudal to the foramen ovale

  • Double canal
  • Contains the Auditory tube and m. tensor veli palatini
36
Q

Give the constituents of os occipitale pars basilaris

A
  • Impressio pontina
  • Impressio medullaris
  • Foramen magnum
  • Condyles with processi paracondylares
  • Foramen n. hypoglossi
37
Q

Impressio pontina

A

Location of the pons

38
Q

Impressio medullaris

A

Location of the medulla oblongata

39
Q

Foramen magnum

A

Passage of the medulla spinalis into the vertebral column

40
Q

Processi paracondylares

A

Cervical vertebral ligamen attachment

Contains foramen/canalis condylaris in Ca

41
Q

Foramen n. hypoglossi

A

The following leave the foramen and cranial cavity:

  • n. hypoglossis (CN-XII)
  • Condylar vein
  • Condylar artery
42
Q

Fossa cranii rostralis

A

Mostly os praesphenoidale

Between laminae cribrosae and alae ossis praesphenoidalis

Caudally bordered by crista orbitosphenoidalis

43
Q

Fossa cranii media

A

Mostly os basisphenoidale

Between crista orbitosphenoidalis and sutra/crista sphenooccipitalis in Eq

Between crista orbitosphenoidalis and dorsum sellae turcicae in other species

44
Q

Fossa cranii caudalis

A

Mostly os occipitale pars basilaris and os temporale pars petrosa

Found between:

  • sutra/crista sphenooccipitalis
  • dorsum sellae turcicae
  • foramen magnum
45
Q

Foramen lacerum

A

Eq/Su Only

Located accross os basisphenoidalis, os temporalis and os occipitalis

Internally conducts:

  • Internal carotid artery and nerve (via incisura carotica)
  • Mandibular nerve (CN-V3) (via incisura ovalis)
  • Middle meningeal artery (via incisura spinosa)
46
Q

Foramen ovale

A

Ca/Ru

Contains Mandibular nerve (CN-V3)

Contains Internal Carotid nerve (In Ru)

47
Q

Foramen caroticum

A

Ca Only

Contains internal carotid nerve

48
Q

Fissura petrooccipitalis

A

Eq/Ru/Su

Continuation of foramen lacerum in Eq/Su

Caudal to the foramen ovale in Ru

49
Q

Foramen Jugulare

A

Between os occipitale and os temporale pars petrosa

Caudal to fissura petrooccipitalis (continuation in Eq/Su)

Internal carotid artery enters the cavum cranii here (in Ca)

Conducts:

  • n. paraglossopharyngeus (CN-IX)
  • n. vagus (CN-X)
  • n. accessorius (CN-XI)
50
Q

Tuberculum musculare

A

Between os basisphenoidale and os occipitale

Attachment of the muscles of the neck

Tuberculum pharyngeum present ventrally (in Ca)

51
Q

Lamina perpendicularis

A

Located caudally of septum nasi

52
Q

Sulcus nervi maxillaris and sulcus nervi ophthalmici form a single groove in which species?

53
Q

Give the constituents of os ethmoidale

A
  1. Lamina cribrosa
  2. Fossae ethmoidales
  3. Crista galli
54
Q

Crista galli

A

Seperates the two ethmoidal fossae

Leads to crista sagittalis interna

55
Q
A

Os praesphenoidale

56
Q
A
  • Lamina cribrosa*
  • Crista galli*
57
Q
A
  • Sulcus chiasmatis*
  • (To canalis opticus)*
58
Q
A

Fissura orbitalis

59
Q
A

Fossa hypophysialis

60
Q
A

Dorsum sellae turcicae

61
Q
A

Foramen jugulare

62
Q
A

Processus paracondylaris

63
Q
A

Foramen ovale

Veterinary Anatomy III (124 decks)

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