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Neuroscience Module 3 > CN and Sensory System Examination > Flashcards

CN and Sensory System Examination Flashcards

1
Q

CN I Origin/ Course

A

Olfactory nerves —> cribriform plate —> olfactory bulb —> olfactory tract —> anterior perforated subtrance —> lateral olfactory stria (—> parahippocampal gyrus) and medial olfactory stria (—> limbic system)

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2
Q

CN II Origin/ Course

A

Retinal ganglion cells —> optic disk —> optic nerve —> orbit —> optic canal —> optic chiasm —> optic tract —> lateral geniculate body (—> optic radiation —> occipital lobe) and superior colliculi (—> pretectal area)

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3
Q

CN III Origin/ Course

A

Midbrain —> interpeduncular fossa —> between superior cerebellar artery and posterior cerebellar arter —> tentorial edge —> cavernous sinus —> medial orbital fissure —> oculomotor nerve, superior division (levator palpebrae and superior rectus muscle) and inferior division (medial and inferior rectus and inferior oblique muscles) or parasympathetic fibers —> ciliary ganglion

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4
Q

CN IV Origin/ Course

A

Midbrain —> dorsal brainstem below the inferior colliculi —> around the cerebral peduncle —> lateral wall of the cavernous sinus —> orbital fissure —> superior oblique muscle

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5
Q

CN V Origin/ Course

A

Pons —> ca.50 root fulaments —> petrous apex —> through the dura mater —> trigeminal ganglion —> foramen rotundum —> foramen ovale

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6
Q

CN VI Origin/ Course

A

Posterior margin of pons —> up the clivus —> dura mater —> petrous apex —> lateral to internal carotid artery —> orbital fissure —> lateral rectus muscle

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7
Q

CN VII Origin/ Course

A

Pons above the olive —> internal acoustic meatus —> petrous pyramid —> geniculum of facial nerve —> medial wall of the tympanic cavity —> stylomastoid foramen —> muscles of facial expression

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8
Q

CN VIII Origin/ Course

A

Lateral to CN VII —> vestibular nerve, cochlear nerve

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9
Q

CN IX Origin/ Course

A

Medulla —> jugular foramen —> bet carotid artery and internal jugular vein —> root of the tongue

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10
Q

CN X Origin/ Course

A

Posterolateral sulcus of the medulla —> jugular foramen —> internal organs

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11
Q

CN XI Origin/ Course

A

Cranial and spinal roots —> trunk of accessory nerve —> jugular foramen —> internal organs

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12
Q

CN XII Origin/ Course

A

Medulla —> hypoglossal canal —> tongue muscles

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13
Q

May be absent when patient has colds

A

CN I

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14
Q

May be absent when there is an inferior frontal brain tumor

A

CN I

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15
Q

Tested by visual confrontation

A

Peripheral vision/ visual fields

CN II

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16
Q

The use of a Snellen or Jaeger chart testing eyes one at a time is used for the test of

A

Central vision/ visual acuity

CN II

17
Q

Distance when using a Snellen chart

A

20 ft or 6m

18
Q

Distance when using a Jaeger chart

A

14 inches or 35.5 cm

19
Q

Innervates the Lateral Recti

A

CN VI

20
Q

Innervates the Superior Oblique Muscles

A

CN IV

21
Q

Innervates the medial recti, superior and inferior recti and the inferior oblique muscles

A

CN III

22
Q

When testing for cranial nerves III, IV and VI the target should slowly trace

A

a large letter H

23
Q

Muscles of of mastication

A

Masseter, temporalis, pterygoids

24
Q

Most common ailment affecting CN V

A

Trigeminal Neuralgia

25
Q

Taste sensation in anterior 2/3 of the tongue comes from

A

CN VII

26
Q

Can be tested grossly by rubbing fingers beside the ears one at a time

A

CN VIII

27
Q

T or F:

Gag reflex is often impaired in patients with stroke

A

TRUE

28
Q

Area of the face where it is most sensitive for temperature discrimination

A

Forehead

29
Q

T or F:

Sensory lesions can have either positive phenomenon (too much sensation) or negative phenomenon (deficit/too little sensation)

A

TRUE

30
Q

Esthia means

A

touch or feeling

31
Q

Therm means

A

heat

32
Q

Algesia means

A

pain

Neuroscience Module 3 (5 decks)

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