Orbit Flashcards
According to Gelatt, how far from midline does the canine orbital axis deviate?
20 degrees
According to Gelatt, how far from midline does the feline orbital axis deviate?
10 degrees
According to Gelatt, how far from midline does the equine orbital axis deviate?
40 degrees
According to Gelatt, how far from midline does the porcine orbital axis deviate?
35 degrees
According to Gelatt, how far from midline does the ox/sheep orbital axis deviate?
50 degrees
According to Gelatt, how many degrees of binocular overlap are there in the equine visual field?
65 degrees
According to Gelatt, how many degrees of binocular overlap are there in the primate visual field?
124 degrees
According to Gelatt, how many degrees of uniocular vision are there in the equine visual field?
146 per field (there are two of these for a total of 292 degrees of uniocular vision)
According to Gelatt, how many degrees of uniocular vision are there in the primate visual field?
42 per field (there are two of these for a total of 84 degrees of uniocular vision)
According to Gelatt, what is the blind area, in degrees, of the equine visual field?
3 degrees
According to Gelatt, what is the blind area, in degrees, of the primate visual field?
152 degrees
According to Gelatt, what bones make up the canine orbit?
lacrimal, zygomatic, frontal, sphenoid, palatine, maxillary.
According to Gelatt, what bones make up the feline orbit?
lacrimal, zygomatic, frontal, sphenoid, palatine, maxillary.
According to Gelatt, what bones make up the equine orbit?
lacrimal, zygomatic, frontal, sphenoid, palatine, temporal.
According to Gelatt, what bones make up the bovine and ovine orbit?
lacrimal, zygomatic, frontal, sphenoid, palatine, maxillary.
According to Gelatt, what bones make up the caprine orbit?
lacrimal, zygomatic, frontal, sphenoid, palatine.
According to Gelatt, what bones make up the porcine orbit?
lacrimal, zygomatic, frontal, sphenoid, palatine, ethmoid.
According to Gelatt, what bones make up the rabbit orbit?
lacrimal, zygomatic, frontal, sphenoid, palatine, temporal. (same as horse)
According to Gelatt, what bones make up the human orbit?
lacrimal, zygomatic, frontal, sphenoid, palatine, maxillary, ethmoid.
Which species possess a rostral alar foramen, and what passes through it?
- canine, feline, equine.
- maxillary artery and nerve
(Gelatt)
Which species possess an ethmoidal foramen, and what passes through it?
- all domestic species
- ethmoidal vessels and nerve
(Gelatt)
Which species possess an orbital fissure, and what passes through it?
- canine, feline, equine
- oculomotor nerve, trochlear nerve, ophthalmic (branch of maxillary) nerve, abducens nerve.
(Gelatt)
What are the orbital dimension in the cat?
24mm wide, 26mm high, 23mm between orbital axes.
Gelatt
What are the orbital dimension of the dog?
29mm wide, 28mm high, 49mm deep, 36mm between orbital axes.
(Gelatt)
What are the orbital dimensions of the horse?
62mm wide, 59mm high, 98mm deep, 173mm between orbital axes.
(Gelatt)
What are the orbital dimension of the cow?
65mm wide, 64mm high, 120mm deep, 151mm between orbital axes.
(Gelatt)
Which species has an orbitorotundum, and what passes through it?
- bovine
- cranial nerves 3 and 4, retinal and internal maxillary arteries.
(Gelatt)
Which species possess an optic foramen and what passes through it?
- all domestic species
- optic nerve, internal ophthalmic artery
(Gelatt)
Which species possess a foramen rotundrum, and what passes through it?
- canine, feline, equine
- maxillary nerve
(Gelatt)
Which species possess a supraorbital foramen, and what passes through it?
- bovine, equine, canine (sometimes feline)
- supraorbital vessels and nerve
(Gelatt)
Which species possess a caudal palatine foramen, and what passes through it?
- all domestic species
- major palatine vessels and nerve
(Gelatt)
Which species possess a maxillary foramen, and what passes through it?
- all domestic species
- infraorbital vessels and nerve
(Gelatt)
Which species possess a sphenopalatine foramen, and what passes through it?
- all domestic species
- sphenopalatine vessels and pterygopalatine nerve
(Gelatt)
Where does Tenon’s capsule attache to?
corneoscleral junction, blends and becomes continuous with the fascia surrounding the EOM’s
(Gelatt)
The periorbita of the dog does not always attach to the periosteum of what bones?
- frontal and sphenoid
Gelatt
