Orbit

Question 1

According to Gelatt, how far from midline does the canine orbital axis deviate?

Answer 1

20 degrees

Question 2

According to Gelatt, how far from midline does the feline orbital axis deviate?

Answer 2

10 degrees

Question 3

According to Gelatt, how far from midline does the equine orbital axis deviate?

Answer 3

40 degrees

Question 4

According to Gelatt, how far from midline does the porcine orbital axis deviate?

Answer 4

35 degrees

Question 5

According to Gelatt, how far from midline does the ox/sheep orbital axis deviate?

Answer 5

50 degrees

Question 6

According to Gelatt, how many degrees of binocular overlap are there in the equine visual field?

Answer 6

65 degrees

Question 7

According to Gelatt, how many degrees of binocular overlap are there in the primate visual field?

Answer 7

124 degrees

Question 8

According to Gelatt, how many degrees of uniocular vision are there in the equine visual field?

Answer 8

146 per field (there are two of these for a total of 292 degrees of uniocular vision)

Question 9

According to Gelatt, how many degrees of uniocular vision are there in the primate visual field?

Answer 9

42 per field (there are two of these for a total of 84 degrees of uniocular vision)

Question 10

According to Gelatt, what is the blind area, in degrees, of the equine visual field?

Answer 10

3 degrees

Question 11

According to Gelatt, what is the blind area, in degrees, of the primate visual field?

Answer 11

152 degrees

Question 12

According to Gelatt, what bones make up the canine orbit?

Answer 12

lacrimal, zygomatic, frontal, sphenoid, palatine, maxillary.

Question 13

According to Gelatt, what bones make up the feline orbit?

Answer 13

lacrimal, zygomatic, frontal, sphenoid, palatine, maxillary.

Question 14

According to Gelatt, what bones make up the equine orbit?

Answer 14

lacrimal, zygomatic, frontal, sphenoid, palatine, temporal.

Question 15

According to Gelatt, what bones make up the bovine and ovine orbit?

Answer 15

lacrimal, zygomatic, frontal, sphenoid, palatine, maxillary.

Question 16

According to Gelatt, what bones make up the caprine orbit?

Answer 16

lacrimal, zygomatic, frontal, sphenoid, palatine.

Question 17

According to Gelatt, what bones make up the porcine orbit?

Answer 17

lacrimal, zygomatic, frontal, sphenoid, palatine, ethmoid.

Question 18

According to Gelatt, what bones make up the rabbit orbit?

Answer 18

lacrimal, zygomatic, frontal, sphenoid, palatine, temporal. (same as horse)

Question 19

According to Gelatt, what bones make up the human orbit?

Answer 19

lacrimal, zygomatic, frontal, sphenoid, palatine, maxillary, ethmoid.

Question 20

Which species possess a rostral alar foramen, and what passes through it?

Answer 20

• canine, feline, equine.
• maxillary artery and nerve
  (Gelatt)

Question 21

Which species possess an ethmoidal foramen, and what passes through it?

Answer 21

• all domestic species
• ethmoidal vessels and nerve
  (Gelatt)

Question 22

Which species possess an orbital fissure, and what passes through it?

Answer 22

• canine, feline, equine
• oculomotor nerve, trochlear nerve, ophthalmic (branch of maxillary) nerve, abducens nerve.
  (Gelatt)

Question 23

What are the orbital dimension in the cat?

Answer 23

24mm wide, 26mm high, 23mm between orbital axes.

Gelatt

Question 24

What are the orbital dimension of the dog?

Answer 24

29mm wide, 28mm high, 49mm deep, 36mm between orbital axes.
(Gelatt)

Question 25

What are the orbital dimensions of the horse?

Answer 25

62mm wide, 59mm high, 98mm deep, 173mm between orbital axes. (Gelatt)

Question 26

What are the orbital dimension of the cow?

Answer 26

65mm wide, 64mm high, 120mm deep, 151mm between orbital axes. (Gelatt)

Question 27

Which species has an orbitorotundum, and what passes through it?

Answer 27

- bovine - cranial nerves 3 and 4, retinal and internal maxillary arteries. (Gelatt)

Question 28

Which species possess an optic foramen and what passes through it?

Answer 28

- all domestic species - optic nerve, internal ophthalmic artery (Gelatt)

Question 29

Which species possess a foramen rotundrum, and what passes through it?

Answer 29

- canine, feline, equine - maxillary nerve (Gelatt)

Question 30

Which species possess a supraorbital foramen, and what passes through it?

Answer 30

- bovine, equine, canine (sometimes feline) - supraorbital vessels and nerve (Gelatt)

Question 31

Which species possess a caudal palatine foramen, and what passes through it?

Answer 31

- all domestic species - major palatine vessels and nerve (Gelatt)

Question 32

Which species possess a maxillary foramen, and what passes through it?

Answer 32

- all domestic species - infraorbital vessels and nerve (Gelatt)

Question 33

Which species possess a sphenopalatine foramen, and what passes through it?

Answer 33

- all domestic species - sphenopalatine vessels and pterygopalatine nerve (Gelatt)

Question 34

Where does Tenon's capsule attache to?

Answer 34

corneoscleral junction, blends and becomes continuous with the fascia surrounding the EOM's (Gelatt)

Question 35

The periorbita of the dog does not always attach to the periosteum of what bones?

Answer 35

- frontal and sphenoid | Gelatt