Trigeminal Nerve: Opthalmic Division Flashcards

1
Q

What does the trigeminal nerve provide?

A

Provides all the pain & proprioceptive (orientation in space) fibers to the face, scalp, jaws, and muscles.

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2
Q

V1 or Ophthalmic courses through?

A

superior orbital fissure-to- orbit

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3
Q

V2 or maxillary courses through?

A

foramen rotundum-to- pterygopalatine fossa

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4
Q

V3 or mandibular courses through?

A

foramen ovale-to- infratemporal fossa

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5
Q

Afferent is

A

sensory fibers that carry impulses towards the brain

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6
Q

Efferent is

A

motor fibers that carry impulses away from the brain

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7
Q

Is the trigeminal nerve specialized to either motor/or sensory?

A

CN5 is 1 of 4 CN that carries both motor & sensory fibers (is not specialized, carries both)

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8
Q

Where is CN5 located?

A

Is attached to the sides of anterior surface of the pons (pons at posterior cranial fossa)

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9
Q

Why is CN5 the largest?

A

made of 2 roots, a large sensory, and small motor

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10
Q

What is the bulge/bump of CN5?

A

It’s the paired trigeminal ganglion sitting in trigeminal ganglion fossa

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11
Q

What are the 3 divisions off the Trigeminal Ganglion?

A

Ophthalmic, Maxillary, & Mandibular

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12
Q

Where are the cell bodies of the sensory fibers located?

A

Located at the Trigeminal Ganglion

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13
Q

What are GSA (general somatic afferent fibers) ?

A

Trigeminal sensory fibers carrying impulses to brain

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14
Q

What is the function of GSA fibers?

A

Provide sensation of pain/temp./touch/proprioception

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15
Q

Where are the cell bodies of the motor fibers located?

A

Located at the motor nucleus of the brain

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16
Q

What are SVE (special visceral efferent fibers) ?

A

Trigeminal motor fibers carry impulses away from brain

17
Q

What is the function of SVE fibers?

A

Provide motor function to muscles

18
Q

V1 Ophthalmic (smallest/sensory) carries sensation to…

A

Carries sensation from scalp, eye, skin of forehead, eyelid, and nose

19
Q

What is the Trigeminal Ganglion, also known as,

A

Semilunar Ganglion

20
Q

V3 is…

A

largest, has large sensory/small motor, sensory initially then course ovale to unite

21
Q

The 3 divisions of V1, Ophthalmic

A

Lacrimal, Frontal, Nasociliary

22
Q

What does the sub-divison Lacrimal Nerve (smallest) supply?

A

Supplies sensory to Lacrimal Gland

23
Q

What are the sub/sub-divisions of the Frontal Nerve (largest)

A

Supraorbital Nerve, Supratrochlear Nerve

24
Q

What does the sub/sub-divison Supraorbital Nerve (larger of 2) supply/course through?

A

Supplies upper eyelid, forehead, anterior scalp region, Leaves orbit through supraorbital notch/foramen

25
Q

What does the sub/sub-divison Supratrochlear Nerve supply/course through?

A

Supplies upper eyelid, lower medial portion of forehead, Leaves orbit by passing over supraorbital margin.

26
Q

What does the sub-divison Nasociliary Nerve (main eye nerve) supply?

A

Supplies eye and lateral surface of nose