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Visual System Anatomy > Sensory Innervation > Flashcards

Sensory Innervation Flashcards

1
Q

what is the maxillary nerve formed by

A

infraorbital + zygomatic nerves, as well as nerves from the roof of the mouth, upper teeth and gums, mucous membranes of cheek–> through foramen rotundum

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2
Q

what does the posterior ethmoid nerve supply

A
  • posterior ethmoid sinus
  • sphenoid sinus
  • frontoethmoid suture (to get into the orbit)
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3
Q

what is the trigeminal nerve pathway

A
  1. ophthalmic + maxillary divisions run in the lateral wall of the cav sin
  2. the mandibular division travels just below the cav sin
  3. all three divisons enter the trigeminal ganglion
  4. fibers enter the lateral pons as the sensory and motor roots of the trigeminal nerve
  5. form ascending and descending tracts which terminate in the sensory nuclei of the trigeminal nerve
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4
Q

how does frontal nerve exit

A

through the sof above the ctr

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5
Q

where does the lacrimal nerve leave the orbit

A

through the sof and above the ctr

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6
Q

referred pain

A

tooth ache –> pain in the eye
-pain can spread + refer to other branches
(infraorbital)

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7
Q

short ciliary nerve pathway

A
  1. travel in the suprachoroid to the posterior globe
  2. exit the sclera with the psoterior ciliary arteries as 6-10 nerves in a ring around the optic nerve
  3. pass through the ciliary ganglion (parasymp) as the sensory root of the ciliary ganglion
  4. the sensory root of the ciliary ganglion joins the nasociliary nerve
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8
Q

herpes zoster

A
  • virus hibernates in sensory nerves
  • can affect side of face (unilateral)
  • hutchinson sign
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9
Q

what does the nasociliary nerve supply

A

supplies globe itself

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10
Q

what is the pathway for the long ciliary nerves

A
  1. fibers from the cornea come together in the area of the cb to form 2 long ciliary nerves, one on the lateral and one on the medial side of the globe
  2. travel in the suprachoroidal space to the back of the eye (9clock + 3clock)
  3. leaves the globe 3mm on either side of the optic nerve
  4. joins the nasociliary nerve
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11
Q

supraorbital nerve innervates

A

forehead + upper eyelids (centrally)

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12
Q

what does the long ciliary nerves innervate

A
  • always 2 sensory + sympathetic to the dilator

- anterior segment of the globe= anterior sclera, cornea, iris, ciliary body (tm)

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13
Q

mesencephalic nucleus

A

proprioception of EOM + face muscles

midbrain

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14
Q

principle sensory nucleus

A

ascending gibers

- touch + pressure in the pons

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15
Q

where does the nasociliary nerve exit the orbit

A

through within the ctr and sof

  • all 5 join
  • all 5 leave orbit as nasociliary
  • only branch of ophthalmic that goes thru ctr
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16
Q

what does the lacrimal nerve innervate

A

lateral upper eyelids, temporal area, sensory portion of lacrimal gland (sensory only)

17
Q

infraorbital nerve innervates pathway

A

-infraorbital foramen –> inraorbital canal –> inferior orbital fissure

18
Q

what are three branches of the trigeminal nerve and main things they supply

A

ophthalmic (around eye), maxillary (inferior orbit), mandibular (lower face + jaw)

19
Q

what are the branches of the nasociliary nerve

A
  • infratrochlear
  • anterior ethmoid
  • posterior ethmoid
  • short ciliary
  • long ciliary
20
Q

short ciliary nerve innervates

A

anterior segment- cornea, iris, cb

21
Q

what does the mandibular nerve innervate

A

lower face, does not pass through the cav sin –> helps localize lesion (pain @ forehead, cheek, cav sin)

22
Q

nucleus of the spinal tract

A

descending fibers
pain + temp
pons + medulla

23
Q

what does the frontal nerve travel between

A

the levator and periorbita

24
Q

what does the anterior ethmoid nerve

A
  • nose
  • skin of medial nose
  • nasal mucosa
  • anterior middle of ethmoid sinus
25
Q

hutchinson sign

A
  • unilateral
  • involves the tip of the nose
  • likely spreads to the orbit area (nasociliary)
  • can affect anterior segment + uveitis usually seen
26
Q

vasovagal response

A

interacts with vagus nerve

-sensory- afferent into interaction with vagus nerve in brainstem

27
Q

infraorbital nerve innervation

A

lower eyelids, cheek, upper lip, upper teeth

28
Q

supratrochlear nerve innervates

A

forehead + upper eyelid (medially)

29
Q

zygomatic exits through

A

inferior orbital fissure

30
Q

what does the infratrochlear nerve

A

medial orbit

caruncle, canaliculi, lacrimal sac, medial eyelids + conj, skin on side of nose

31
Q

what does the zygomatic nerve innervate

A

lateral forehead
lateral cheek
lateral lower eyelid

32
Q

what are the three branches of the ophthalmic nerve

A

nasociliary, frontal, lacrimal

33
Q

axenfold loops

A
  • long ciliary nerve loops into sclera before joining to form long ciliary nerve
  • darkened pigmented area- usually superior sclera pressure can cause pain
  • 5 mm from limbus

Visual System Anatomy (10 decks)

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