Lachmans TEST REVIEW (PERSONAL Head/Neck) (Part 1) Flashcards
(39 cards)
Bell’s palsy is believed to be caused by inflammation and swelling of the the? Where?
Facial nerve within the facial canal
The facial nerve courses within the ? Of what Bone?
Facial canal of the petrous portion of the temporal bone
The facial nerve emerges from the skull at ?? and passes through what gland?
Stylomastoid foramen
Parotid gland
Paralysis of orbicularis oculi…
Prevents the patient from closing her eye in squinting, but more importantly it prevents blinking.
The most serious complication of facial paralysis, is due to what muscle being impacted and its role in doing what to the eye?
Orb Oculi
Blinking distributes tears over the cornea, which is necessary to keep it moist and to prevent drying
The muscle responsible for opening the eye is the.. innervated by ?
levator palpebrae superioris.
CNVIII (Occulomotor)`
What is the buccinator muscle, its innervation, and its function?
Facial nerve (CN VII).
1) maintains tension in the cheek, keeps food from accumulating between the cheek and teeth during chewing,
2) prevents the cheek mucosa from being caught between the teeth during mastication.
Paralysis of this muscle allows food to collect between the teeth and the cheek, making it diffi cult to chew the food.
Buccinator (CNVII)
The inability to purse the lips or to show the teeth of the affected side is caused by paralysis of the ?
Orbicularis oris
The facial nerve also contains sensory nerve fibers whose cell bodies are in the
Geniculate ganglion
Posterior auricular nerve provides sensory innervation to the region
posterior to the external ear and also to the posterior portion of the external ear canal
Chorda tympani is a branch of the
Facial nerve
Because the parotid gland, the largest of the salivary glands, is not innervated by the facial nerve … But rather?
Glossopharyngeal nerve
Chorda tympani is a branch of the facial nerve that emerges from the nerve within the temporal bone and then passes through the middle ear cavity and emerges through the
Petrotympanic fisssure to enter the infratemporal fossa.
What are the salivary glands?
parotid, submandibular, and sublingual
What are the parotid, submandibular, and sublingual glands innervated by?
Parotid- Glossopharyngeal
Submandibular- Chorda tympani nerve (CNVII)
Sublingual- Chorda tympani nerve (CNVII)
Chorda tympani contains sensory fibers for ?
Taste for the anterior 2/3rd tongue
Facial nerve also provides motor innervation to the ______ muscle in the middle ear. The function of this muscle is to ?
Stapedius
Attenuate the amplitude of vibration of the stapes (attenuate the perceived sound entering the inner ear at the oval window)
What is the greater petrosal nerve (Branch?)
Facial nerve (cranial nerve VII)
Parasympathetic fibers to the lacrimal, oral, nasal, and palatine glands
What is septic thrombosis?
A blood clot (thrombosis) in a vein that occurs in the setting of infection and inflammation.
What do the labial veins drain into?
Tributaries of the facial vein…. terminates in the internal jugular vein (IJV).
What vein communicates with the facial vein and connects to the cavernous sinus?
Angular vein, which connects to the superior ophthalmic vein, which drains into the cavernous sinus.
Why can infections from the face spread to the brain?
Facial veins lack valves, allowing bidirectional flow of blood — especially toward the cavernous sinus.
What is the deep facial vein’s significance in spreading infection?
It connects the facial vein to the pterygoid venous plexus, which anastomoses with the cavernous sinus via emissary veins.
