Head Miscellaneous

Question 1

What is the midline of the skull called

Answer 1

Sagittal suture

Question 2

What is the cribiform plate

Answer 2

Barrier between nasal cavity and brain

Question 3

What are the perforations in the cribiform plate for?

Answer 3

Olfactory nerves

Question 4

What does the tympanic bulla contain?

Answer 4

Middle and inner ear (semicircular canals)

Question 5

What des the large hole of the tympanic bulla allow the passage of?

Answer 5

Ear canal

Question 6

What are trephine sites/holes?

Answer 6

Where a hole is drilled into the skull

Question 7

Describe the differences between the herbivore and carnivore TMJ?

Answer 7

Herbivore allows lots of lateral movement

Question 8

Name the holes found in the orbital bone?

Answer 8

Optic canal
Orbital fissure
Alar canal

Question 9

What passes through the optic canal foramen?

Answer 9

CN 2 - optic

Question 10

What passes through the orbital fissure?

Answer 10

CN III, IV, V, VI

Question 11

What passes through the alar canal?

Answer 11

Maxillary branch of trigeminal nerve

Maxillary artery

Question 12

What are the foramina in the inner mandible called? What passes through this?

Answer 12

Mandibular of alveolar foramen

Mandibular branch of trigeminal nerve

Question 13

What are the outer mandibular foramina called? What passes through this?

Answer 13

Mental foramina

Mandibular branch of trigeminal nerve

Question 14

What is the thin cutaneous muscle lying over the neck? What is its innervation?

Answer 14

Platysma

Cervical branch of the facial nerve

Question 15

Which is the snarling muscle? Which nerve innervates this?

Answer 15

Zygomaticus

Facial nerve

Question 16

WHat is the depressor of the ear opposite the zygomaticus called? What innervates this?

Answer 16

Parotidoauricularis

Facial nerve

Question 17

What veins does the jugular branch into?

Answer 17

Maxillary vein
Lingofacial vein (branches into lingual and facial)

Question 18

Where are the mandibular lymph nodes found?

Answer 18

Either side of the facial vein

Question 19

Where is the parotid lymph node found? What does it drain?

Answer 19

Caudal to zygomatic arch

Dorsal structures of the head

Question 20

What is the name of the swellings that attach the frenulum to the floor of the mouth?

Answer 20

Sublingual caruncles

Question 21

The tympanic bulla is part of which bone?

Answer 21

Temporal

Question 22

Which hyoid bones are fused in the horse?

Answer 22

Stylohyoid

Epihyoid

Question 23

What is an overbite called?

Answer 23

Prognathism

Question 24

What is an underbite called?

Answer 24

Brachygnathism

Question 25

What do the a1/a2 receptors do?

Answer 25

Arterioles constrict

To decrease TPR

Question 26

What do M1 receptors do?

Answer 26

Decrease HR, less action potentials less contractility

Question 27

What do B1 receptors do?

Answer 27

Increase heart rate, more action potentials, more contractility

Question 28

What do B2 receptors do?

Answer 28

Cause arteriole vasodilation

Increase TPR