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Cranial Nerves - Coggle Diagram

- - - - Chorda tympani
        
        Carries periphery sensory fibers from geniculate ganglion to anterior 2/3 of tongue
        
        Supply taste to that region
    - - Fibers from geniculate ganglion trave with a CN X branch to supply skin on both aspects of the auricle, region of the concha, and opening of external acoustic meatus
        
        Why Q tips feel good!
  - - - Posterior belly of digastric m.
      - Stylohyoid m.
        
        Are embryologically derived from 2nd pharyngeal branch/branchial arch.
        
        Note:Post. Belly not anterior! Anterior belly is emb. derived from first pharyngeal arch, and is innerv. by nerve to mylohyoid m.
      - Auricular mm.
      - Stapedius m.
        
        Stabalizes stapes, smallest bone in human
      - M. of facial expression (-> = insert to)
        
        Zygomaticus major and minor
        
        Pull the angles of the mouth up and laterally, (smile), minor is superior to major
        
        Zygomatic arch-> angle of the mouth
        
        Risorius
        
        Moves angles of the mouth laterally only (grin, laugh)
        
        Cheek -> angle of mouth
        
        Levator anguli oris
        
        underneath infraorbital foramen-> angle of mouth
        
        Buccinator
        
        Keeps food in the mouth when chewing, resist cheek expansion when you blow (trumpter muscle)
        
        Maxilla/mandible -> angle of mouth. Forms muscular base of the cheek
        
        Levator Labii Superioris
        
        elevate the upper lip+flare nostrils
        
        above the infraoribital foramen->upper lip
        
        Depressor anguili oris
        
        Depress angles of the mouth (frown)
        
        Lower border of mandible -> angle of mouth
        
        Oribucularis oris
        
        Close mouth against resistance, protrude lips (kissing muscle)
        
        encircles the mouth
        
        Mentalis
        
        Forms the furrow between chin and lip (pout)
        
        paired central muscle of the lower lip, forns the furrow between cheek and lips
        
        Orbicularis oculi
        
        Close eyelids(blink,squint)
        
        Muscle surrounding eye
        
        occiptofrontalis
        
        raise eyebrow+ wrinkle forehead
        
        consist of frontal and occipital bellies which are connected by epicranial aponeurosis which both of them attach
        
        Bellies embryologically develop together and then separate. Due to shared emb. origin, occipitalis muscles at the back of the head are innerv. by CN VII (facial n.)
    - - presynaptic parasympathetic fibers given off by CN VII
        
        Via Greater petrosal n. (parasymp.)
        
        Innerv. lacrimal glands via zygomatic branch of CN V2 and lacrimal nerve of CN V1
        
        synapse pterygopalatine ganglion
        
        Joins the deep petrosal n. (sympathetic) to form nerve of pterygoid canal
        
        Via Chorda Tympani(parasymp.)
        
        innerv. sublingual and submandibular glands
        
        Joins with linguinal nerve of CN V3
        
        synapses in submandibular ganglion
  - - - In canal, nerve makes a turn denoted by the geniculate ganglion
        
        Geniculate ganglion is facial n.'s sensory ganglion
        
        In facial canal, facial n. gives rise to 3 branches
        
        Chorda tympani
        
        Branch occurs near stylomastoid foramen
        
        Nerve to stapedius muscle
        
        Middle of facial canal?
        
        Greater petrosal n.
        
        Branch occurs near geniculate ganglion
        
        Exits the temporal bone via stylomastoid foramen
        
        Foramen is between styloid and mastoid process.
        
        CN VII heads anteriorly, enters parotid gland and branches off into 5 terminal motor branches
        
        Buccal
        
        Mandibular
        
        Zygomatic
        
        Cervical
        
        Temporal
        
        Before entering parotid gland
        
        CN VII gives off posterior auricular n.
        
        Ways to remember this
        
        Use your hand - palm towards face and pointing forward
        
        5 more items...
        
        Mnemonic: Two Zebras Ate My Cookie, Ate=Buccal b/c food means salivia means mouth
- - - - V1 and V2
  - - - Distributed only to V3(Mandibular division)
        
        Innervates
        
        Ant. belly of digastric m.
        
        Tensor veli palatini
        
        Mylohyoid m.
        
        Tensor tympani
        
        M. of mastication
        
        Masseter
        
        Medial pterygoid
        
        Temporalis
        
        Lateral pterygoid
  - - - Exists the Skull through 3 Foramens
        
        Foramen Rotundum
        
        Maxillary (V2)
        
        Only Sensory
        
        Infra-orbital nerve
        
        Greater palatine nerves
        
        Post. superior alveolar b.
        
        Lesser palatine nerves
        
        Ganglionic branches to pterygopalatine ganglion
        
        Posterior superior lateral nasal branches
        
        Zygomatic n.
        
        Nasopalatine nerves
        
        Menigeal branch
        
        Pharyngeal nerve
        
        Foramen Ovale
        
        Mandibular (V3)
        
        Sensory and Motor Function
        
        Branches of Gen. sensory
        
        Auriculotemporal n.
        
        Buccal nerve
        
        Lingual n.
        
        Menigeal branch
        
        Inf. alveolar n.
        
        2 more items...
        
        Branches of somatic motor
        
        Superior Orbital Fissure
        
        Opthalmic (VI)
        
        Only Sensory
        
        Lacrimal nerve
        
        Frontal nerve
        
        Tentorial nerve
        
        Nasociliary nerve
        
        Towards the eyes
        
        Test CN V1 with corneal reflex-touch cornea w/ a wisep of cotton -> patient/animal will blink if nerve is functional.
        
        Mnemonic: Standing Room Only. S=V1 R=V2 O=V3