Cranial Innervations&BitchHikers Flashcards
General Motor Fibers of Trigeminal - CN V3 innervate which muscles?
Tensor Tympani - ear: dampens sound
Muscles of Massttication
-Temporalis
-Masseter
-Medial Pterygoid
-Lateral Pterygoid
Inferior Alveolar Nerve: sensory, motor, or both? Where does it come from? What does it do?
Both.
From V3 Trigeminal.
Sensory: Sensation of skin over the lower jaw, side of the head, lower teeth, oral cavity.
Motor:
-Mylohyoid
-Ant. Digastric
CN V3 branches into which sensory nerves.
Auriculotemporal N.
Lingual N.
Inferior Alveolar N.
Lingual Nerve comes from what nerve? What is its function?
From Trigeminal V3. The sensation of Ant 2/3 of the tongue.
Auriculortemporal N comes from what nerve and does what?
Trigeminal V3 - ???
What makes up Chorda Tympani
CN VII - Facial Nerve sensation and parasympathetic fibers
Who does Chorda Tympani catch a ride with
Lingual Nerve of V3
Chorda Tympani relays what sensory information
Taste of anterior 2/3 of the tongue via facial nerve sensory fibers
Chorda Tympani parasympathetic fibers innervate which glands - what is its effect
Submandibular and Sublingual Glands
Saliva Production
If the Lingual Nerve is injured - what are the effects
No sensation or taste
No saliva production from submandibular and sublingual glands
If Chorda Tympani is injured - what are the effects
No taste or saliva production of sublingual and submandibular glands.
Sensation INTACT via lingual
What nerve is the target for local anesthetic in dental procedures? Why is the tongue also usually affected?
Inferior Alveolar Nerve. Also commonly hits lingual nerve.
General Sensation of Lacrimal Gland is from?
Trigeminal V1 via the lacrimal nerve
Parasympathetic activation of the Lacrimal Gland and Nasal Glands is from?
Parasympathetic Greater Petrosal Nerve of facial nerve (CN VII) that catches a ride on Trigeminal V2(?)
What is the parasympathetic ganglion in the eye associated with the oculomotor nerve?
Ciliary Ganglion
Oculomotor has what parasympathetic effects on the eye?
parasympathetic innervation to muscles of iris and ciliary muscles controlling lens shape
- Near Vision accommodation
Trochlear Nerve (CN IV) does what?
Innvervates Superior Oblique muscle
What are the two branches of the CN V1?
Lacrimal Nerve
Frontal Nerve
Lacrimal nerve does?
Sensation to lacrimal gland and eyelid
Frontal Nerve does?
Sensory innervation to orbit, skin of forehead
CN V2 innervates?
Sensation of skin of face over upper jaw, upper teeth, inferior/posterior nasal cavity, hard palate in oral cavity
Branches of CN V2
Infraorbital Nerve
Palatine Nerves
Function of Palatine Nerves
Sensation in posterior nasal cavity, roof of mouth
CN V2 parasympathetics come from? What nerve does the parasympathetic activation?
Greater Petrosal of Facial Nerve (CN VII)
PSNS of Lacrimal and Nasal Glands
All trigeminal branches share one common sensory innveration, which is?
Dura Mater
The function of cranial nerve 6. CN VI.
Motor to lateral rectus muscle in orbit
Facial Nerve has motor innervations to which muscles?
Muscles of Facial Expression:
Frontalis
Oribicularis Oculi
Orbicularis Oris
Buccinator
1 Ear Muscle:
Stapedius.
3 Neck Muscles:
Platysma
Stylohyoid
Post. Digastric
Function of Stapedius Muscle
Pulls stapes off oval window - diminished sound transmission
Special Sensation function of facial nerve
Taste of ant. 2/3 of tongue. Runs with parasympathetic fibers to form chorda tympani
Where does the facial nerve exit the skull
Stylomastoid foramen
Function of CN VIII - Vestibulocochlear
Balance (Semicircular canals)
Hearing (Cochlea)
Somatic Sensation innervations of CN IX - glossopharyngeal
Taste and general sensation to posterior 1/3 of tongue, soft palate, and pharynx near tongue, general sensation of tympanic cavity, tympanic membrane, auditory tube.
Motor innervation of CN IX - glossopharyngeal
Stylopharyngeus Muscle
Parasympathetics of CN IX - glossopharyngeal
- parasympathetic innervation to the parotid gland via the Lesser Petrosal Nerve by
hitchhiking on V3
-innervates carotid sinus/body with parasympathetic fibers
Visceral Sensations of CN IX - Glossopharyngeal
visceral sensory innervation of carotid bifurcation for blood pressure control
Special sensory innervation of CN X - Vagus
Special sensory innervation of taste to palate/epiglottis
General Sensory Innervations of CN X - Vagus
General sensory innervation from epiglottis, larynx.
Visceral Sensory Innervation of CN X - Vagus
Visceral sensory innervation to GI tract, thorax, and abdomen.
Motor innervations of CN X - Vagus
Somatic motor innervation to pharynx, larynx, palatal muscles.
Parasympathetic motor innervations of CN X - Vagus
Parasympathetic motor innervation to GI tract, thorax, abdomen.
CN XI innervates?
Motor innervation to sternocleidomastoid and trapezius
General function of CN XII
Intrinsic and Extrinsic tongue muscle movement
Where can you see CN XII
Visible in neck just superior to carotid bifurcation
