lecture 39: Bovine skull and eye (tell me if i need to add anything) Flashcards
match the animal to the fundus
A= fundus of eye of cow
B= fundus of eye of goat
what is this
iridic granules surrounding pupil in an Llama eyeglobe
purpose of the” ‘iridic granules” (corpora nigra)
they are used to to shade the eye from bright
sunlight.
In bright light these iridic granules can actually interlock to completely cover the centre of the pupil. This leaves just two holes open on either end of the pupil, reducing the amount of light that can enter the eye.
list all the species that have iridic granules surrounding the pupil
These odd looking structures are also found in horses, cattle and sheep
Bovine eye anterior structures: identify 1-6
1 –iris
2 –pupil
3 –iridic granule
4 – nicitating membrane
5 – conjunctiva
6 - puncta
Identify 1-3
- cilliary bodies
- pupil
identify 6 and 7
identify 8-10
8)choroid coat
9)tapetum lucidum
10) retina
identify the chambers and the humor
- anterior chamber with aqueous humor
- posterior chamber with vitreus humor
- viterus humor
- cornea
- pupil
- lens
tapetum lucidum
what CN innervates this muscle:
Inferior(ventral) oblique
CN3 elevates and turns eye laterally
what CN innervates this muscle:
Inferior(ventral) Rectus
CN 3 pulls eye inferior (look down)
what CN innervates this muscle:
Superior (dorsal) Rectus
CN3 pulls eye superior (look up)
what CN innervates this muscle:
Medial rectus
CN3 pulls eye medially
what CN innervates this muscle:
Lateral Rectus
CN6 pulls eye laterally
what CN innervates this muscle:
Superior (dorsal) oblique
CN4 depresses eye and turn eye laterally
“dehorning procedure” often exposes ______
cornual sinuses
what is this showing
Horn shears to remove horn & expose cornual sinus (bovine)
what is this showing
Cauterization of horn base (caprine)
15 years old
how old is this cow
9 years
how old is this cow
8 years
how old is this cow
5 years
how old is this cow
2-2.5
How old is this cow
1.5-2 years
Why is this Limbus important
this is where you put an injection (between sclera and cornea)
what is the name of CNIII
oculomotor nerve
what is the name of CN VI
abducen nerve
what is the name of CNIV
trochlear nerve
OD=
OS=
OU=
OD= right eye
OS= left eye
OU= both eyes
Lens is suspended bind the ____
pupil
what is going on when an animal is diagnosed with glaucoma
There’s a problem with the drainage of aqueous humor (not usually overproduction).
This causes it to build up, leading to increased intraocular pressure (IOP).
How does fluid travel through the chambers of the eye
from posterior chamber out the pupil into the anterior chamber
When you are dehorning an adult, what makes it a more risky procedure
you are opening the frontal sinus which might attract insects/parasites to infiltrate the area
**this is why we do it in the winter so there is less insect risk
Sinus extends up into the lumen of the _________. It comes off the ____________ sinus
horn
caudal frontal sinus
The corneal sinus comes off the _______ sinus
caudal frontal
Do ruminants have upper incisors
no
Do ruminants have canines
no
soondree said he emphasized permanent teeth
soondree said he emphasized permanent teeth
what type of teeth do caprine have
hypsodont cheek teeth (PM and M)
**aids in grinding
artiodactyla vs. perissodactyla
A= even # of toes (ruminant, camelids, pigs)
P= odd # toes (horse)
Do caprine have upper incisors
no, there are no teeth on their dental pad
what is the cornual process
The corneal process is the bony part of the frontal bone that supports the horn.
It is hollow and contains an extension of the frontal sinus, which can be exposed if the horn is damaged or removed.
