Bovine Skull & Eye Anatomy

Temporary: before birth-1 week

Permanent: 12-18 months

Sheep & Goat Eruption Dates: Incisor 1

Temporary: before birth-1 week

Permanent: 18-24 months

Sheep & Goat Eruption Dates: Incisor 2

Temporary: before birth-1 week

Permanent: 30-36 months

Sheep & Goat Eruption Dates: Incisor 3

Temporary: birth-1 week (1-3)

Permanent: 36-48 months

Sheep & Goat Eruption Dates: Incisor 4

Temporary: birth-4 weeks (3)

Permanent: 18-24 months

Sheep & Goat Eruption Dates: Premolar 2

Temporary: birth-4 weeks (3)

Permanent: 18-24 months

Sheep & Goat Eruption Dates: Premolar 3

Temporary: birth-4 weeks (3)

Permanent: 18-24 months

Sheep & Goat Eruption Dates: Premolar 4

Temporary: N/A

Permanent: 3 months (3-4)

Sheep & Goat Eruption Dates: Molar 1

Temporary: N/A

Permanent: 9 months (8-10)

Sheep & Goat Eruption Dates: Molar 2

Temporary: N/A

Permanent: 18 months (18-24)

Sheep & Goat Eruption Dates: Molar 3

Age at eruption: 1.5-2 years

Level & neck emerged from gum: 6 years

Bovine Eruption Dates: I1

Age at eruption: 2-2.5 years

Level & neck emerged from gum: 7 years

Bovine Eruption Dates: I2

Age at eruption: 3 years

Level & neck emerged from gum: 8 years

Bovine Eruption Dates: I3

Age at eruption: 3.5-4 years

Level & neck emerged from gum: 9 years

Bovine Eruption Dates: I4

all at 5 years

At what age are bovine teeth "in wear"?

cornual sinuses

What does the "dehorning procedure" often expose?

CNIII - elevates & turns eye laterally

What nerve innervates the inferior oblique muscle & what is the movement?

CNIII - pulls eye inferiorly

What nerve innervates the inferior rectus muscle & what is the movement?

CNIII - pulls eye superiorly

What nerve innervates the superior rectus muscle & what is the movement?

CNIII - pulls eye medially

What nerve innervates the medial rectus muscle & what is the movement?

CNVI - pulls eye laterally

What nerve innervates the lateral rectus muscle & what is the movement?

CNIV - depresses & turns eye laterally

What nerve innervates the superior oblique muscle & what is the movement?

iridic granules

In llamas, horses, cattle, and sheep, the _____ surround the pupil

shade the eye from bright sunlight

What purpose do iridic granules serve in the eye?

interlock to completely cover the center of the pupil

What can happen to the iridic granules of the eye in bright light?

fundus

What is shown here?

A - cow

B - goat