Canine Head P2

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Questions and Answers

What is the function of the superficial muscles of facial expression?

To open, close or move lips, eyelids, nose and ear.

We make FACIAL expressions when we make Large Black POOPZ. What are 7 facial muscles?

Levator nasolabialis, Buccinator, Platysma, Orbicularis Oculi, Orbicularis oris, Parotidauricularis, and Zygomaticus

Match the correct functions to the muscle that carries out the action

Buccinator = Moves food from buccal vestibule to oral cavity Orbicularis oris = From corners of mouth to rostral midline. Closes lips Parotidoauricularis = In danger during ear ablation surgery Levator nasolabialis = Raises upper lip and dilates lateral naris

This muscle is the most superficial muscle keeps the cheeks taut, and anchors/aids pulling back corner of mouth.

Platysma m. Signup and view all the answers

The zygomaticus m. closes the lips.

False Signup and view all the answers

What are the 3 principle structures at risk during an ear ablation?

The three structures are the parotidoauricularis muscle, parotid salivary gland and facial nerve branches Signup and view all the answers

What nerve provides motor innervation to all muscles of facial expression?

Facial n. Signup and view all the answers

The most common cause of facial paralysis is due to otitis media.

True Signup and view all the answers

What structure is found running on the surface of the masseter muscle between buccal branches of CNII?

The parotid salivary duct Signup and view all the answers

What are the four muscles of mastication?

Masseter, temporalis, pterygoids and digastricus Signup and view all the answers

All of the muscles of mastication receive motor innervation from the __ nerve of the nerve.

All of the muscles of mastication receive motor innervation from the Mandibular nerve of the Trigeminal nerve Signup and view all the answers

Which of the muscles of mastication runs from the paracondylar process of the skull to ventral borders of the mandible?

Digastricus Signup and view all the answers

Which division of the trigeminal nerve is responsible solely for sensory innervation?

Ophthalmic nerve Signup and view all the answers

What is the primary function of the mandibular division of the trigeminal nerve?

Motor innervation to the muscles of mastication Signup and view all the answers

Through which anatomical structure does the maxillary nerve primarily exit the skull?

Rostral alar foramen Signup and view all the answers

Which of the following nerves is NOT a division of the trigeminal nerve?

Facial nerve Signup and view all the answers

Which specific foramen allows the mandibular nerve to exit the skull?

Oval foramen Signup and view all the answers

Ophthalmic nerve is 100% sensory and enters skull at orbital fissure

True Signup and view all the answers

Study Notes

Trigeminal Nerve Function

Motor innervation to muscles of mastication and mylohyoideus via the mandibular division
Sensory innervation to the face via all three divisions: ophthalmic, maxillary, and mandibular

Trigeminal Nerve Divisions

Ophthalmic nerve (100% sensory):
- Exits the skull through the orbital fissure
Maxillary nerve (100% sensory):
- Exits the rostral alar foramen and then the round foramen
- Travels through the infraorbital groove
Mandibular nerve (mixed sensory and motor):
- Exits the oval foramen
- Contains both sensory (lingual) and motor branches
- Sensory branches exit the inferior alveolar foramen

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Description

Facial muscles, innervation ablation surgery