Head Miscellaneous Flashcards
What is the midline of the skull called
Sagittal suture
What is the cribiform plate
Barrier between nasal cavity and brain
What are the perforations in the cribiform plate for?
Olfactory nerves
What does the tympanic bulla contain?
Middle and inner ear (semicircular canals)
What des the large hole of the tympanic bulla allow the passage of?
Ear canal
What are trephine sites/holes?
Where a hole is drilled into the skull
Describe the differences between the herbivore and carnivore TMJ?
Herbivore allows lots of lateral movement
Name the holes found in the orbital bone?
Optic canal
Orbital fissure
Alar canal
What passes through the optic canal foramen?
CN 2 - optic
What passes through the orbital fissure?
CN III, IV, V, VI
What passes through the alar canal?
Maxillary branch of trigeminal nerve
Maxillary artery
What are the foramina in the inner mandible called? What passes through this?
Mandibular of alveolar foramen
Mandibular branch of trigeminal nerve
What are the outer mandibular foramina called? What passes through this?
Mental foramina
Mandibular branch of trigeminal nerve
What is the thin cutaneous muscle lying over the neck? What is its innervation?
Platysma
Cervical branch of the facial nerve
Which is the snarling muscle? Which nerve innervates this?
Zygomaticus
Facial nerve
WHat is the depressor of the ear opposite the zygomaticus called? What innervates this?
Parotidoauricularis
Facial nerve
What veins does the jugular branch into?
Maxillary vein Lingofacial vein (branches into lingual and facial)
Where are the mandibular lymph nodes found?
Either side of the facial vein
Where is the parotid lymph node found? What does it drain?
Caudal to zygomatic arch
Dorsal structures of the head
What is the name of the swellings that attach the frenulum to the floor of the mouth?
Sublingual caruncles
The tympanic bulla is part of which bone?
Temporal
Which hyoid bones are fused in the horse?
Stylohyoid
Epihyoid
What is an overbite called?
Prognathism
What is an underbite called?
Brachygnathism
What do the a1/a2 receptors do?
Arterioles constrict
To decrease TPR
What do M1 receptors do?
Decrease HR, less action potentials less contractility
What do B1 receptors do?
Increase heart rate, more action potentials, more contractility
What do B2 receptors do?
Cause arteriole vasodilation
Increase TPR
