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15 Cards in this Set
- Front
- Back
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CN III motor component
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Origin: Oculomotor nucleus
Inn: All eye m (except 2) + levator muscle (lifts eyelid) |
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CN III Parasympathetic component
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Origin: E-W nucleus
Inn: ciliary m (accomodation)& Iris sphincter m (pupillary constriction) |
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Wrinkled forehead, raised eyebrow, drooping lid (ptosis), dilated pupil (bc of lack of PS inn), eye directed down & out
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CN III
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Ipsilateral Ophthalmoplegia
Contralateral hemiparesis (corticospinal) Speech & facial expression (corticobulbar) |
Ant. Alternating Hemiplegia
CN III |
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Ipsilateral Ophthalmoplegia
Contralateral hemiparesis (corticospinal) Speech & facial expression (corticobulbar) Incoordination of limbs |
Claude's syndrome (includes Red nucleus)
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CN IV Motor component
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Origin: Trochlear nucleus
Inn: Superior Oblique (SIN) |
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Eye extorted, diplopia, difficulty looking down & in, head tilt (depends on lesion)
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Lesion of CN IV
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If lesion of trochlear nerve (crossed) how is the head tilted?
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tilt towards normal
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If lesion of trochlear nucleus (uncrossed)
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tilt towards lesion side
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CN VI Motor component
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Origin: Abducens nucleus
Inn: lateral rectus |
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CN VI runs near what other CN?
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CN VII
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Eye directed medially, patient cannot move eye laterally, diplopia, head turn towards affected eye
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Lesion in CN VI
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Ipsilateral opthalmoplegia
Contralateral hemiplegia (corticospinal) Problems w/ speech & facial expression (corticobulbar) Effect on cerebellum |
Middle Alt. hemiplegia
CN VI |
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Problems with Vertical gaze lead to what syndrome?
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Parinaud's Syndrome
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Horizontal gaze center
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paramedian pontine reticular formation (PPRF)
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