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Veterinary Anatomy III > THRA.2 > Flashcards

THRA.2 Flashcards

1
Q

Give the main components of the topic: “Bones of the Lateral and Dorsal Side of the Neurocranium”

A
  1. Os temporale
  2. Os frontale
  3. Os parietale
  4. Os interparietale
  5. Os ethmoidale
  6. Os occipitale
  7. Os zygomaticum
  8. Os pterygoideum
  9. Os palatinum
  10. Os lacrimalis

(FITZ POPPLE)

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2
Q

Give the main constituents of os temporale​

A
  1. Pars squamosa
  2. Pars petrosa
  3. Pars tympanica
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3
Q

Give the components of os temporale pars squamosa

A
  1. Crista temporalis
  2. Linea temporalis
  3. Sinus frontalis caudalis
  4. Processus nuchalis (Su)
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4
Q

Sinus frontalis caudalis

A

Excavates os temporale in Ru/Su

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5
Q

Processus nuchalis

A

Su Only

Attachment point of the the stylohyoid bone

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6
Q

Give the components of os temporale pars petrosa

A
  1. Crista partis petrosae (Eq/Ca)
  2. Fissura petrooccipitalis
  3. Foramen Stylomastoideum
  4. Processus styloideus (ØCa)
  5. Porus acusticus internus
  6. Meatus acusticus internus
  7. Apertura externa aqueductus vestibuli
  8. Apertura externa canaliculi cochleae
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7
Q
  • Crista partis petrosae*
  • Fissura petrooccipitalis*
A

Junction of the petrous and occipital bones

Conducts greater petrosal nerve and the chorda tympani

(Both ex CN-VII)

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8
Q

Foramen stylomastoideum

A

Between processus styloideus and processus mastoideus

Conducts the facial nerve (CN-VII) through canalis facialis

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9
Q

Processus styloideus

A

Rostroventral to the porus acusticus externus

Attachment of the stylohyoid bone in Eq/Ru

(Attachment in Ca is the processus mastoideus)

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10
Q

Porus acusticus internus et meatus acusticus internus

A
  • Area nervi facialis* (CN-VII) (RostDors)
  • Area cochleae* (ex CN-VIII) (RostVent)
  • Foramen vestibulare dorsale* (ex CN-VIII) (CaudDors)
  • Foramen vestibular ventrale* (exCN-VIII (Caud Vent)
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11
Q

Incisura semilunaris

A

Aka fovea ganglii nervi trigemini

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12
Q

Apertura externa aqueductis vestibuli

A

Dorsal slit on pars petrosa

Communication of the vestibular apparatus with the middle ear

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13
Q

Apertura externa canaliculi cochleae

A

Caudoventral slit on pars petrosa

Communication of the cochlea with the middle ear

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14
Q

Give the components of os temporale pars tympanica

A
  1. Porus acusticus externus
  2. Meatus acusticus externus
  3. Bulla tympanica
  4. Processus muscularis
  5. Fissura petrotympanica
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15
Q

Which structure(s) seperate pars tympanica from pars petrosa?

A
  1. Bulla tympanica
  2. Processus muscularis
  3. Fissura petrotympanica
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16
Q

Give the components of Os frontale

A
  1. Crista sagittalis externa
  2. Processus tentoricus
  3. Processus cornualis (Bo Only)
  4. Foramen supraorbitale (ØCa)
  5. Sinus frontalis
  6. Foramen ethmoidale
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17
Q

Foramen supraorbitale

A

ØCa

Becomes canalis supraorbitalis (Ru/Su)

Frontal artery, vein and nerve (ex CN-V1)

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18
Q

Sinus frontalis

A

Seperated by septum sagittalis into left and right sinuses

Single in Eq

Divided in Ca/Ru/Su

19
Q

Foramen ethmoidale

A

Foramina in Ru

In equine, also includes the ethmoid bone

External ethmoidal artery

Ethmoidal vein and nerve (ex CN-V1)

20
Q

Give the component(s) of os parietale et os interparietale

A

Crista sagittalis externa et processus tentoricus

21
Q

Which species is os parietale et os interparietale not fused?

22
Q

Give the component(s) of os ethmoidale

A
  • Crista sagittalis interna*
  • Lamina perpendicularis*
23
Q

Give the main component(s) of os occipitale

A
  1. Pars squamosa et Partes laterales
  2. Facies nuchalis
24
Q

Give the component(s) of os occipitale pars squamosa et partes laterales

A
  1. Protuberentia occipitalis interna
  2. Sinus frontalis caudalis
  3. Impressiones vermales
  4. Sulci sinus transversi
25
Q

Sinus frontalis caudalis

A

Excavates the occipital bone in Ru/Su

26
Q

Give the component(s) of facies nuchalis ossis ocipitalis

A
  1. Protuberentia occipitalis externa​
  2. Crista nuchae
  3. Foramen mastoideum (ØSu)
27
Q

Protuberentia occipitalis externa

A

Attachment of ligamentum nuchae

Crista occipitalis externa runs ventrally from here to foramen magnum

28
Q

Crista nuchae

A

Becomes the linea nuchae (Ru only)

29
Q

Foramen mastoideum

A

ØSu

Mastoid emissary vein

Small meningeal branch of the occipital artery

30
Q

Give the main component(s) of os lacrimale

A

Bulla lacrimalis (Ru)

31
Q

Bulla lacrimalis

A

Ru Only

Ventral to the orbit, Connects to sinus maxillaris

32
Q

Give the key structure(s) of the topic: “Bones of the Lateral and Dorsal Side of the Neurocranium”

A
  1. Calvaria
  2. Arcus zygomaticus
  3. Orbita
  4. Meatus temporalis
  5. Fossa pterygopalatina
  6. Fossa temporalis
33
Q

Calvaria

A

Composed of Occipital, parietal, interparietal and frontal bones

Posesses impressiones digitatae

Ca/Eq:​ Tentorium cerebelli osseum

34
Q

Tentorium cerebelli osseum

A

Eq/Ca

Seperates cerebrum from cerebellum dorsally

Composed of processi tentorici of the parietal, interparietal and occipital bones

35
Q

Arcus Zygomaticus

A

Composition:

  • Os temporale pars squamosa: Processus zygomaticus*
  • Os frontale: Processus zygomaticus*
  • Os zygomaticum: Processus temporale:*
  • (+Processus frontale* in Ru/Ca/Su)

Orbital ligament attachment in Ca/Su

36
Q

In equine, the os temporalis processus zygomaticus directly joins the…

A

Os temporale pars squamosa processus zygomaticus

37
Q

Give the structure(s) found on orbita

A
  1. Fossa sacci lacrimalis
  2. Fossa glandulae lacrimalis (Eq/Ru)
  3. Fossa musculi obliqui ventralis
  4. Fovea throchlearis
38
Q

Meatus temporalis

A

Between pars petrosa and pars squamosa of os temporale

Travels from foramen retroarticulare → External jugular vein

39
Q

Fossa pterygopalatina

A

Caudoventral to the Orbit

Contains:

  • Foramen palatinum caudale
  • Foramen maxillaris
  • Foramen sphenopalatinum

(Vent → Dors)

40
Q

Foramen palatinum caudale

A

A./v. palatina major →

Palatine Plexus + nervi palatina major (ex CN-V2)

41
Q

Foramen maxillaris

A

A./V. maxillaris

via canalis infraorbitalis

nervi infraorbitalis (ex CN-V2)

42
Q

Foramen sphenopalatinum

A

Located medially in Eq/Ru

A./V. sphenopalatina + nervi nasalis caudalis (ex CN-V2) → Nasal Cavity

43
Q

Fossa temporalis

A

Section of lamina externa, bordered by:

  • linea temporalis* (Rostrally)
  • Crista temporalis* (Ventrolaterally)
  • Crista sagittalis externa* (Median Plane)
  • Crista nuchae* (Caudally)

Veterinary Anatomy III (124 decks)

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