Veterinary Anatomy III > THRA.5 > Flashcards

THRA.5 Flashcards

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1
Q

Where does the mandible fuse rostrally?

A

The median mandibular synchondrosis

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2
Q

Which species rostrally have a fully ossified mandible?

A

Eq/Su

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3
Q

The two halves of the mandible diverge to enclose the…

A

Spatium mandibulae

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4
Q

Corpus mandibulae can be divided into which parts?

A
  • Pars incisiva
  • Pars molaris
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5
Q

Diastema is between…

A

C1 and P1

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6
Q

Which channel passes through the body of the mandible?

A

Canalis mandibularis

  • From foramen mandibulae
  • To foramen mentale (Foramina mentales in Ca/Su)
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7
Q

Which structure(s) pass through canalis mandibularis?

A
  • A./v. alveolaris inferior*
  • N. alveolaris mandibularis* (ex CN-V3)
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8
Q

Blood supply to the incisors travels through the…

A

Canalis mandibuloincisivus

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9
Q

Incisura vasorum facialium hosts which vessels?

A
  • A. facialis
  • V. facialis
  • Ductus parotideus
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10
Q

Incisura vasorum facialium is present in which species?

A

Eq Only

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11
Q

Where does the ramus mandibulae articulate?

A
  • Art. temporomandibularis*
  • Caput mandibulae* of processus condylaris presses against fossa mandibularis of the processus zygomaticus of os temporalis
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12
Q

What allows the gliding motion of art. temporomandibularis?

A

Discus temporomandibularis

Inside a synoival capsule

The dorsal and ventral compartments are divided by membrana synovialis

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13
Q

The outer membrana fibrosa of art. temporomandibularis is strengthened by…

A
  • Lig. laterale
  • Lig. caudale (ØCa/Su)

These extend between processus retroarticularis and the base of processis coronoideus

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14
Q
A

Fossa Temporalis

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15
Q
A

Tuberculum articulare

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16
Q
A

Processus Coronoideus

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17
Q
A

Ramus Mandibulae

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18
Q
A

Processus Condylaris

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19
Q
A

Processus Angularis (Ca)

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20
Q
A

Angulus Mandibulae

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21
Q
A

Incisura Mandibulae

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22
Q
A

Tuberositas M. Sternomandibularis (Eq)

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23
Q

Compare margo ventralis in Ru and Eq

A

Eq: Flat

Ru: Rounded

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24
Q
A

M. Temporalis

O: Fossa Temporalis

I: Coronoid Process on Mandible

A: Close Jaw

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25
M. Masseter O: Zygomatic Arch I: Fossa Massaterica on Mandible A: Close Jaw
26
M. Masseter O: Zygomatic Arch I: Fossa Massaterica on Mandible A: Close Jaw
27
M. Pterygoideus Medialis O: Fossa Pterygopalatina I: Fossa Pterygoidea A: Grinding Movements, Close Jaw
28
M. Temporalis O: Fossa Temporalis I: Coronoid Process on Mandible A: Close Jaw
29
M. Pterygoideus Medialis O: Fossa Pterygopalatina I: Fossa Pterygoidea A: Grinding Movements, Close Jaw
30
M. Digastricus O: Processus Paracondylaris on Occipital Bone I: Margo Ventralis on Mandible / Processus angularis (Ca only) A: Open Mouth
31
M. Pterygoideus Lateralis O: Crista pterygoidea I: Fovea Pterygoidea A: Grinding movements, Closing Jaw
32
M. Digastricus O: Processus Paracondylaris on Occipital Bone I: Margo Ventralis on Mandible / Processus angularis (Ca only) A: Open Mouth
33
M. Digastricus O: Processus Paracondylaris on Occipital Bone I: Margo Ventralis on Mandible / Processus angularis (Ca only) A: Open Mouth
34
M. Pterygoideus Lateralis O: Crista pterygoidea I: Fovea Pterygoidea A: Grinding Movements, Close Jaw
35
Which muscle(s) close the jaw?
1. *M. temporalis* 2. *M. pterygoideus medialis* 3. *M. pterygoideus lateralis* 4. *M. masseter*
36
What does the hyoid skeleton consist of?
* *Os hyoideum* */ apparatus hyoideus* * *Suspensory apparatus*
37
What attaches the hyoid skeleton dorsally to the temporal bone?
Suspensory apparatus
38
What are the functions of the hyoid bones?
Act as a suspensory architecture for the tongue and larynx
39
Where does the Hyoid bone attach to the skull?
* Mastoid process (Ca) * Styloid process (Eq/Ru) * Nuchal process (Su)
40
*Epihyoideum* Ligament in Su
41
*Basilhyoideum*
42
*Thyrohyoideum* Connects with *cartilago thyroidea*
43
*Angulus stylohyoideus*
44
*Processus lingualis* (Eq/Ru)
45
*Ceratohyoideum*
46
*Stylohyoideum*
47
*Tympanohyoideum*
48
What is the *os hyoideum* composed of?
1. Basilhyoid 2. Thyrohyoid 3. Ceratohyoid
49
What is the suspensory apparatus composed of?
1. Epihyoid 2. Stylohyoid 3. Tympanohyoid
50
In which species are the Epihyoid and Stylohyoid fused?
Equine
51
Give the muscle(s) moving the hyoid skeleton
1. *M. ceratohyoideus* 2. *M. geniohyoideus* 3. *M. mylohyoideus* 4. *M. occipitohyoideus* 5. *M. omohyoideus* (Ø Ca) 6. *M. sternohyoideus* 7. *M. sternothyroideus* 8. *M. stylohyoideus* 9. *M. thyreohyoideus*
52
2
*M. stylohyoideus* O: Styloid bone I: Basilhyoid bone A: Raises basilhyoid
53
3
*M. mylohyoideus* O: *linea mylohyoidea* I: Median raphe, Basilhyoid A: Raises floor of oral cavity
54
4
*M. geniohyoideus* O: *Ramus mandibulae* I: Basilhyoid A: Pulls hyoid and larynx rostrally
55
5
*M. sternohyoideus* O: *Manubrium sterni,* Costal cartilage of R1 I: Basilhyoid A: Pulls basilyoid caudally
56
10
*M. ceratohyoideus* O: Ceratohyoid I: Thyrohyoid A: Reduces angle between the bones
57
9
*M. occipitohyoideus* O: *Processus paracondylaris* I: Stylohyoid A: Moves stylohyoid caudally
58
7
*M. sternothyroideus* O: *Manubrium sterni,* costal cartilage of R1 I: *Linea obliqua* of the thyroid cartilage A: Draws the larynx caudally
59
8
*M. thyrohyoideus* O: *Linea obliqua* of the thyroid cartilage I: Thyrohyoid bone A: Draws the hyoid caudally / the larynx rostrally
60
6
*M. omohyoideus* (Ø Ca) O: Subscapular fascia (Eq) / Lateral cervical fascia (Ru) I: Basilhyoid A: Retracts the hyoid
Veterinary Anatomy III
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