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Head and Neck 1 > CN III VII IX X > Flashcards

CN III VII IX X Flashcards

1
Q

Somatic NS Neurons

A

1 somatic sensory neuron (from sensory receptor in skin)

1 somatic motor neuron (from brain stem to skeletal muscle)

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2
Q

Autonomic NS neurons

A

1 visceral sensory neuron (from viscera of organ to brainstem, unipolar so theres a ganglion but no synapse)

2 Autonomic motor neurons (from brainstem to autonomic ganglion to target, Pre and post ganglion)

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3
Q

Parasympathetic CN, ganglionic neurons, target

A
  • CNIII–> Ciliary–> Intrinsic eye muscles
  • CN VII–> Pterygopalatine and submandibular ganglia–> Nasal glands, tear, and salivary glands
  • CN IX–> Otic ganglion–> Parotid salivary gland
  • CN X–> Intramural ganglion–> visceral organs of neck
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4
Q

CN III

Somatic Motor

Function

Origin

Exit

A
  • Somatic Motor, General Somatic Efferent
  • Function
    • Eye muscles
    • Medial rectus
    • Inferior Rectus
    • Superior rectus
    • Inferior oblique
    • Levator Palpebrae superioris
  • Origin
    • Oculomotor nucleus
  • Path
    • Superior orbital fissure of sphenoid
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5
Q

CN III

Autonomic Motor

Function

Origin

A
  • General Visceral Effernt
  • Function
    • Provides Parasymapathetic innervation to
      • Sphincter pupillae
      • Cilliary muscles
    • Via Ciliary Ganglion
    • Control pupil constriction and accomodation
  • Origin
    • Edinger-Westphal nucleus
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6
Q

Where are parasympathetic fibers in CN III

A

Inferior Branch

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7
Q

Where are pre-ganglionic and post ganglionic fibers in CN III

A

Pre-Ganglionic travel from Edinger-Westphal Nucleus to Ciliary Ganglion

Post-Ganglionic go from Cilliary ganglion to Eye

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8
Q

Occulomotor Branches from Superior Division

A
  • GSE
    • Levator palpabrae superioris
    • Superior Rectus
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9
Q

Oculomotor Inferior branches

A
  • GSE
    • Medial Rectus
    • Inferior rectus
    • Inferior Oblique
  • GVE
    • Cilliary ganglion, hitch hikes on short cilliary (V1)
    • Sphincter Pupillae
    • Ciliary Muscles
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10
Q

What passes through the Ciliary Ganglion

A

CN III GVE Parasympathetic Synpase within

Sympathetic root

V1 (Sensory?)

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11
Q

Sympathetic Innervation for Intrinsic Eye

Path

Innervation

A
  • Pre-ganglionic travel to superior cervical plexus
  • Post-ganglionic travel to long and short ciliary nerves
    • Wrap around ICA, Internal Carotid Plexus
  • Innervates
    • Dilator Papillae
    • Ciliary
    • Superior tarsal
      • branch off LPS and eyelid
      • Forces ye open wide
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12
Q

What are the 4 results of CN III Lesions

A
  • Diplopia
  • Lateral stabismus
    • wall eyed
  • Ptosis
    • Dropping of eyelid
    • Disabled levator palpebrae superioris
  • Mydraisis
    • Pupil dilation
    • Disable pupillary sphincter
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13
Q

CN VII

General Sensory

Function

Origin

Associated Nuclei

A
  • GSA
  • Sensation for
    • External acoustic meatus
    • skin of ear
  • Fibers carries in Nervuus Intermedius
  • O: Geniculate ganglion
  • Associated: Spinal Nucleus of V
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14
Q

CN VII

Special Sensory

Function

O

AN

A
  • SVA
  • Taste from anterior 2/3 tongue
  • Floor of mouth
  • Palate
  • Fibers in Nervuus Intermedius
  • O: Geniculate ganglion
  • AN: Solitary Nucleus
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15
Q

CN VII

GVA

Function

O

AN

A
  • Visceral Sensory
  • Nocireceptors of nasopharynx
  • Nervuus intermedius
  • O: Geniculate Ganglion
  • AN: Solitary Nucleus
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16
Q

CN VII

GVE

Function

O

AN

A
  • Parasympathetic to
    • Lacrimal glands (Nose & Palate)
    • Via Pterygopalatine Ganglion
    • Causes secretion/vasodilation
  • Parasympathetic to
    • Submandibular gland
    • Sublingual gland
    • Via Submandibular ganglion
  • O: Superior salivatory nucleus
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17
Q

CN VII

SVE
Function

O

Path

A
  • Motor to
    • Muscles of facial expression
    • Stapedius
    • Posterior digastric
    • Stylohyoid
    • Muscles of 2nd Pharyngeal arch
  • Fibers in motor root
  • O: Facial Motor Nucleus
  • Path: Internal Acoustic Meatus–> Stylomastoid foramen
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18
Q

Major branches of facial nerve

A
  • Golly Polly
    • Greater Petrosal
  • Sure is
    • Stapedius
  • Cute Today
    • Chorda Tympani
  • PaDS
    • Posterior auricular nerve
    • Nerve to posterior digastric
    • Nerve to Stylohyoid
  • To Zanzibar By Motor Car
    • Temporal
    • Zygomatic
    • Buccal
    • Mandibular
    • Cervical
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19
Q

Where does the Greater Petrosal n branch from

A

Geniculate ganglion in the greater petrosal nerve canal

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20
Q

What does the Greater Petrosal n carry

A
  • Carries Pre-ganglionis parasympathetic fibers to lacrimal gland, nasal/palatal glands,
  • GVA sensory fibers from the nasopharynx
    *
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21
Q

What does the Greater petrosal n join with and what is it associated with

A
  • Joins with deep petrosal nerve (Sympathetic) in the Pterygoid canal to become
  • Nerve of pterygoid canal (Vidian n)
  • Associated with Pterygopalatine ganglion
  • Fibers hitch hike on V1 and V2
22
Q

Stapedius

Functional group

A

Motor

Special Visceral Effernt

Branchial Motor

Visceral Motor

23
Q

What does Chorda Tympani carry

A

Pre-ganglionic fibers to sublingual and submandibular glands and SVA taste fibers

24
Q

What structures does the Chorda Tympani pass

A

Travels anterior to tympanic membrane but does not innervate

Passes through petrotympanic fissure to the infratemporal fossa

25
Q

Route of Parasympathetic fibers of Chorda Tympani

A

Joins V3 lingual on the way to sublingual and submandibular glands

Travels through Submandibular ganglion

26
Q

Innervation of the glands of the face

A
  • All glands of the face are innervated by CN VII except Parotid (IX)
  • Facial does travel through parotid though
  • Glands above oral fissure (lips)
    • Greater petrosal via pterygopalatine ganglion
  • Glands below lips
    • Chorda tympani via submandibular ganglion
27
Q

Parasympathetic Innervation of Lacrimal Gland

A
  • Pre-ganglionic neuron
    • From Superior Salivatory nucleus
    • Greater petrosal n
    • Joins with Deep Petrosal n (Sympathetic) to form nerve of pterygoid canal (Vidian n)
  • Post-ganglionic neuron
    • Pterygopalatine ganglion
    • Hitch hikes on sygomatic n of V2
    • Communicating branch
    • Lacrimal n of V1
28
Q

Parasympathetic innervation of submandibular and sublingual glands

A
  • Pre-ganglionic neuron
    • From Superior Salivatory Nucleus
    • Chorda tympani exits through pterotympanic fissure
    • Hitch hikes on lingual n of V3
  • Post-ganglionic neuron
    • Submandibular ganglion
    • Continues to hitch hike on lingual n. V3
29
Q

Facial Nerve Proper

1st set of Branches

Type

A
  • Passes through the stylomastoid foramen
  • PaDS
    • Posterior Auricularis
      • Motor, also to occipitalis
      • Joins with other auricular nerves
    • Posterior Digastric- Motor
    • Stylohyoid- Motor
30
Q

Facial Nerve Proper

2nd set of Branches

Type

Muscles associated

A
  • To Zanzibar By Motor Car
    • Temporal
      • Motor auricularis anterior/superior, frontalis, orbicularis oculi, corrugator supercili, procerus
    • Zygomatic (malar) n.
      • Motor orbicularis oculi, zygomaticus
    • Buccal
      • Buccinator, orbicularis oris
    • Mandibular
      • Depressor labii inferioris, Depressor anguli oris, mentalis
    • Cervical
      • Depressor anguli oris, platysma
31
Q

Bell’s Palsy

A

Damage to SVE of CN VII

Damage is at stylomastoid formaen

32
Q

CN IX

GSA

Function

O

AN

A
  • Sensory to external ear, Posterior 1/3 of tongue
  • O: Superior Glossopharyngeal ganglion
  • AN: Trigeminal Sensory Nucleus
33
Q

CN IX

GVA

Function

O

AN

A
  • Sensory
    • Nasopharynx/Oropharynx (Palaine tonsil)
    • Middle ear
    • Carotid body (Chemoreceptors, respiration)
    • Carotid Sinus (Baroreceptors, arterial blood pressure)
    • Main sensory for Pharyngeal Plexus
  • O: Inferior Glossopharyngeal ganglion
  • AN: Solitary Nucleus
34
Q

CN IX

SVA

Function

O

AN

A
  • Taste on posterior 1/3 tongue and pharynx
  • O: Inferior glossopharyngeal ganglion
  • AN: Solitary nucleus
35
Q

CN IX

GVE

Function

O

A
  • Parasympathetic fibers to Parotid gland
    • Via Otic ganglon
    • Causes secretion vasodilation
  • O: Inferior salivatory nucleus
36
Q

CN IX

SVE

Function

O

A
  • Motor to stylopharyngeus (swallowing)
  • Muscles of the 3rd Pharyngeal arch
  • O: Nucleus Ambiguus
37
Q

Tympanic n

Branch of

Enters via

Contains

Forms

A
  • Branch of CNIX
  • Enters middle ear cavity
  • Contains sensory and preganglionic parasympathetic fibers
  • Forms part of tympanic plexus
38
Q

Tympanic n

Composed of

Provides

A
  • Sensory, tympanic n
  • Preganglionic parasympathetics, tympanic nerve
  • Postganglionic sympathetics from the superior cervical ganglion
  • Provides sensory and sympathetics to the middle ear cavity, pharyngotympanic tube, and mastoid air cells
39
Q

Lesser Petrosal n

Branch of

Branches from

Contains

A
  • Branch of CN IX
  • Branches from the tympanic nerve/plexus
  • Contains preganglionic parasympathetic fibers
40
Q

Lesser Petrosal n

Travel through

AN

Travels to

A
  • Travels through foramen ovale
  • Fibers synapse in otic ganglion
  • Travel to parotid gland
    • Hitch hikes on V3 auriculotemporal n
41
Q

Parasympathetic Innervation of Parotid gland

A
  • Pre-ganglionic neuron
    • Inferior salivatory nucleus
    • CN IX exits jugular foramen
    • Tympanic n of IX joins tympanic plexus, becomes lesser petrosaln
    • Lesser petrosal exits foramen ovale
  • Post ganglionic neuron
    • Otic ganglion
    • Hitch hikes on auriculotemporal n of V3
42
Q

Innervation of tongue

Sensory

A
  • Anterior 2/3
    • Mandibular V3 via lingual n.
      • General sensation
    • CN VII via chorda tympani
      • Special sensation (taste)
  • Posterior 1/3
    • CN IX
      • General and special sensation (taste)
43
Q

Motor Innervation of tongue

A
  • CN XII
    • Intrinsic muscle
    • Genioglossus
    • Hyoglossus
    • Styloglossus
  • CN X
    • Palatoglossus
44
Q

CN X

Course and distribution

A
  • Descends through carotid sheath
  • THrough mediastinum
  • Pierces diaphragm with esophagus
  • Terminal branches in abdomen
45
Q

CN X

GSA

Function

O

AN

A
  • Sensory of external ear
  • O: Superior Ganglia of X
  • AN:Trigeminal Sensory Nucleus
46
Q

CN X

GVA

Function

O

AN

A
  • Sensory to laryngopharynx, larynx, thorax, abdomen
  • O: Inferior Ganglia of X
  • AN: Solitary nucleus
47
Q

CN X

SVA

Function

OAN

A
  • Taste to palate and epiglotis
  • O:Inferior Ganglia of X
  • AN:Solitary Nucleus
48
Q

CN X

GVE

Function

O

A
  • Parasympatheic for thoracic and abdomen organs
  • Via Intramural ganglia
  • O: Dorsal Vagal motor nucleus
49
Q

CN X

SVE

Function

O

A
  • Motor to palatal, phrayngeal, and laryngeal muscles
  • Muscles from 4th pharyngeal arch
  • Motor to pharyngeal plexus
  • O: Nucleus ambiguus
50
Q

Branches of Vagus Nerve

A
  • Pharyngeal
  • Superior laryngeal
    • Internal laryngeal
    • External laryngeal
  • Recurrent laryngeal

Head and Neck 1 (13 decks)

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