OCB04-2004 Face and Scalp Flashcards
What are the 3 branches of trigeminal nerve?
Opthalmic
Maxillary
Mandibular
Which of the trigeminal branches are sensory or motor?
v1: sensory
v2: sensory
v3: mixed
Where does the ophthalmic branch pass through?
Superior orbital fissure
Where does the maxillary branch pass through?
Foramen rotundum
Where does the mandibular branch pass through?
Foreamen ovale
What is the only moveable facial joint?
TMJ
What cavity does the trigeminal ganglion occupy?
Meckel’s cave
Where is the Meckel’s cave located?
In the dura mater near the apex of the petrous part of the temporal bone
What is V1 sensory to?
Skin of most of the forehead
Conjunctivia and upper eye lid
Bridge of the nose and frontal sinus
Antero-superior nasal cavity
What is the v2 branch sensory to?
Skin of the cheek, upper lip
upper teeth, gums, hard and soft palate, maxillary sinus, posterior- inferior nasal cavity
What is the v3 branch of the trigeminal nerve sensory to?
Skin of the temple
And most of the skin over the lower jaw
What area of skin of the lower jaw is not innervated by v3?
Skin over the angle of the jaw
What is v3 branch motor to?
Muscles of mastication and tensor tympani, tensor palatine and anterior belly of digastric
What does v3 enter the mandibular bone through?
Mandibular foreamen
What is the plexus of the maxillary nerve called?
Superior dental plexus
What is the plexus of the mandibular nerve called?
inferior dental plexus
What is trigeminal neuralgia?
pain coming from the trigeminal nerve
Sudden severe pains that come from one or more branches of the trigeminal nerve
That usually affects one side of the face
What branches are most commonly affected in trigeminal neuralgia?
The second and third branches so pain is around the cheek or jaw
What is trigeminal neuralgia caused by?
Movement of a blood vessel, which is often due to inflammation, which consequently presses on the root of the nerve
What drug is used to calm the pain in trigeminal neuralgia?
carbamezepine
which is an anticonvulsant,
What occurs if carbamezepine is ineffective?
Surgical management which involves a craniotomy at the dural sinus, where there is relief of pressure and subsequently pain
What are the further branches of v1 called?
Supraorbital and Supratrochlear branches
What are the further branches of v2 called?
Infraorbital branch