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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
Route of Parasympathetic fibers of Chorda Tympani
Joins V3 lingual on the way to sublingual and submandibular glands Travels through Submandibular ganglion
26
Innervation of the glands of the face
* 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
Parasympathetic Innervation of Lacrimal Gland
* 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
Parasympathetic innervation of submandibular and sublingual glands
* 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
Facial Nerve Proper 1st set of Branches Type
* Passes through the stylomastoid foramen * PaDS * Posterior Auricularis * Motor, also to occipitalis * Joins with other auricular nerves * Posterior Digastric- Motor * Stylohyoid- Motor
30
Facial Nerve Proper 2nd set of Branches Type Muscles associated
* 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
Bell's Palsy
Damage to SVE of CN VII Damage is at stylomastoid formaen
32
CN IX GSA Function O AN
* Sensory to external ear, Posterior 1/3 of tongue * O: Superior Glossopharyngeal ganglion * AN: Trigeminal Sensory Nucleus
33
CN IX GVA Function O AN
* 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
CN IX SVA Function O AN
* Taste on posterior 1/3 tongue and pharynx * O: Inferior glossopharyngeal ganglion * AN: Solitary nucleus
35
CN IX GVE Function O
* Parasympathetic fibers to Parotid gland * Via Otic ganglon * Causes secretion vasodilation * O: Inferior salivatory nucleus
36
CN IX SVE Function O
* Motor to stylopharyngeus (swallowing) * Muscles of the 3rd Pharyngeal arch * O: Nucleus Ambiguus
37
Tympanic n Branch of Enters via Contains Forms
* Branch of CNIX * Enters middle ear cavity * Contains sensory and preganglionic parasympathetic fibers * Forms part of tympanic plexus
38
Tympanic n Composed of Provides
* 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
Lesser Petrosal n Branch of Branches from Contains
* Branch of CN IX * Branches from the tympanic nerve/plexus * Contains preganglionic parasympathetic fibers
40
Lesser Petrosal n Travel through AN Travels to
* Travels through foramen ovale * Fibers synapse in otic ganglion * Travel to parotid gland * Hitch hikes on V3 auriculotemporal n
41
Parasympathetic Innervation of Parotid gland
* 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
Innervation of tongue Sensory
* 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
Motor Innervation of tongue
* CN XII * Intrinsic muscle * Genioglossus * Hyoglossus * Styloglossus * CN X * Palatoglossus
44
CN X Course and distribution
* Descends through carotid sheath * THrough mediastinum * Pierces diaphragm with esophagus * Terminal branches in abdomen
45
CN X GSA Function O AN
* Sensory of external ear * O: Superior Ganglia of X * AN:Trigeminal Sensory Nucleus
46
CN X GVA Function O AN
* Sensory to laryngopharynx, larynx, thorax, abdomen * O: Inferior Ganglia of X * AN: Solitary nucleus
47
CN X SVA Function OAN
* Taste to palate and epiglotis * O:Inferior Ganglia of X * AN:Solitary Nucleus
48
CN X GVE Function O
* Parasympatheic for thoracic and abdomen organs * Via Intramural ganglia * O: Dorsal Vagal motor nucleus
49
CN X SVE Function O
* Motor to palatal, phrayngeal, and laryngeal muscles * Muscles from 4th pharyngeal arch * Motor to pharyngeal plexus * O: Nucleus ambiguus
50
Branches of Vagus Nerve
* Pharyngeal * Superior laryngeal * Internal laryngeal * External laryngeal * Recurrent laryngeal

Head and Neck 1 (13 decks)

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