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12 Cards in this Set
- Front
- Back
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What is the pathway in R1 of the blink reflex?
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trigeminal nerve -> sensory nu V pons ->ipsi facial nucleus pons (disynpatic) -> ipsi facial nerve
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What is the pathway in R2 of the blink reflex?
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trigeminal nerve_> sensory nu V pons-> spinal tract V medulla-> ipsi + contra facial nu pons -> bilateral facial nerve
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What are the 5 motor branches of facial nerve and their muscles?
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Temporalis- Frontalis
Zygomatic- Orbicularis Oculi Buccal- Orb Oris Mandibular- Mentalis Cervical- Platysma |
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What other muscles besides facial expression are innervated by 7 (name 3)?
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1. posterior belly digastric
2. Stylohyoid 3. Stapedius |
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What is the pathway of the 7th n?
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motor n+nervus intermedius -> greater & lesser petrosal n. -> branch to stapedius-> chorda tympani ->digastric, styloyhyoid, posterior auricular and facial motor branches
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What is the normal R1 latency?
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10-12 msec
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What is the normal R2 latency?
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30-40 msec
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What is the normal difference side to side R1?
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1.2 msec
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What is the normal difference side to side ipsi R2?
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5 msec
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What is the normal difference side to side contra R2?
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7 msec
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What should the sweep speed be set at for blink reflex?
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5-10 msec per divission
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What should the sensitivity be set at for blink reflex?
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100 OR 200 microvolts/division
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