Innervation of Face (week 2) Flashcards
Nucleus for motor innervation of the face (Facial n. CN VII)
Motor Nucleus of VII (pons)
Suprahyoid branch of the Facial nerve innervates what two muscles?
Stylohyoid and Posterior belly of the Digastric muscle
What is the final structure CN VII passes through before branching?
Stylomastoid Foramen
General Sensation for the face comes from what Cranial Nerve?
Trigeminal (CN V)
All of the motor innervation of the face is done by what cranial nerve?
Facial n. (CN VII)
What are the three divisions of CN V?
V1 (Opthalmic), V2 (Maxillary), V3 (Mandibular)
Sensory cell bodies for General Sensation of the face are found in which ganglion?
Trigeminal Ganglion
Where is the location of branching in CN V - V1?
In the Orbit
What three main nerves branch from the Opthalmic (V1) nerve in the orbit?
Lacrimal Nerve, Frontal Nerve and Nasociliary Nerve
Two smaller branches come from the Frontal nerve. What are they?
Supraorbital nerve and Supratrochlear nerve
What nerve branch from V1 of CN V innervates the bridge of the nose?
External Nasal nerve
Which nerve branch from V1 of CN V innervates the medial upper eyelid and lacrimal sac?
Infratrochlear nerve
The Anterior Ethmoid nerve is a branch from what other branch of V1 from CN V?
Nasociliary nerve
What are the two main branches of the Nasociliary nerve from V1 of CN V?
Infratrochlear nerve and Anterior ethmoid nerve
What does the Lacrimal nerve branch of V1 (CN V) innervate?
Lateral Upper Eyelid
The two nerve branches from the Frontal Nerve branch of V1 innervate the same structures. What are they?
Upper eyelid, Forehead and Scalp
As V1 branches off of the Trigeminal Ganglion, what structure does it pass through first?
Cavernous Sinus
Just before entering the Orbit, V1 of CN V passes through what structure?
Superior Orbital Fissure
What is the smaller nerve branch off of the Anterior Ethmoid nerve that innervates the bridge of the nose?
External nasal nerve
Nerve branches from V2 in what space?
Pterygopalatine Fossa
Two branches of V2 in Pterygopalatine Fossa
Zygomatic and Infraorbital nerve
Zygomatic nerve enters what space after it branches off of V2
Inferior Orbital Fissue –> Orbit
Zygomatic branch of V2 gives off two smaller branches. What are they
Zygomaticotemporal and Zygomaticofacial
Zygomaticofacial Nerve supplies general sensation to what?
Skin over zygomatic arch
Infraorbital nerve gives off what three branches as it exits the infraorbital foramen
Inferior Palpebral, Lateral nasal and Superior Labial
Zygomaticotemporal nerve supplies general sensation to what?
Skin over anterior temple
V3 branches into what two trunks in what space?
Anterior and Posterior trunks, Infratemporal Fossa
What nerve comes off of the Anterior Trunk of V3
Buccal Nerve
What nerve comes off of the Posterior Trunk of V3
Auriculotemporal nerve
What nerve supplies general sensation to the Cheek and Mandibular buccal gingiva
Buccal nerve
After the trunk branching, V3 continues on as what nerve?
Inferior Alveolar Nerve
Inferior Alveolar nerve enters what foramen as it passes through the mandible
Mandibular Foramen
V3 finally terminates as it exits the mental foramen as what nerve?
The mental nerve
Mental nerve supplies general sensation to what structures?
Chin
Lower Lip
Labial Gingiva
What nerve supplies general sensation to the Auricle, Skin of temple and lateral scalp?
Auriculotemporal nerve
What three branches arise AFTER the Facial nerve (CN VII) exits the stylomastoid foramen?
Auricularis, Occipitalis and Suprahyoid
