Neuropathology
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| What is NCS/EMG used for? | To reveal lower motor neuron phenomenon
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| Injury or disease of the nerve is called? | neuropathy
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| Injury and or disease of the muscle is called? | myopathy
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| What are three types of myopathy? | genetically determined, toxic, and inflammatory
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| Can peripheral nerves regenerate? | yes
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| If these are destroyed peripheral nerves cant regenerate. | perikaryons
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| The perikaryon is also known as the what? | cell body
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| The axon grows at a rate of ______. | 1-3mm/day
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| Nerve fiber distal to the injury degenerates along with its myelin sheath = ? | wallerian degeneration
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| After nerve injury what does the nucleus do? | moves to the periphery
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| After nerve injury what happens to the nissl bodies? | they become greatly reduced
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| Three weeks post nerve injury muscle fibers show pronounced atrophy secondary to ________. | denervation
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| About how long does it take for the nerve fiber to regenerate? | 3 months
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| neurapraxia, axonotmesis, neurotmesis, all are considered axonal degeneration neuropathies...which form of nerve classification does this describe? | seddon
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| five degrees, based on pathology and EMG/NCS changes...which form of nerve classification does this describe? | Sunderland
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| Conduction loss (temporary or transient block) without structural loss of the axon – mildest form of nerve block is what? | neurapraxia 1st degree
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| What are common causes of neurapraxia 1st degree? | compresison, ischemia, ionic changes of the nerve fibers
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| With neurapraxia, recovery takes place within _______ following removal of the cause. | days or weeks
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| Axons lose continuity with subsequent wallerian degeneration along the distal segment followed by denervation-induced muscle atrophy is called? | axonotmesis
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| With axonotmesis conduction ceases ________ across the site of the nerve injury. | imeediatly
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| With axonotmesis there is _________ loss of excitability first at the neuromuscular junction then the distal nerve segment. | irreversible
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| Axonotmesis recovery depends on what and can take how long. | regeneration of nerve fibers, can take months to years
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| an injury that separates the entire nerve, including the supporting connective tissue is called? | neurotmesis
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| If pt's with nerotmesis do not have _______ _______, regeneration proceeds slowly, resulting in an incomplete and poorly organized repair. | surgical intervention
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| In neurotmesis, what kind of response do you get with a NCS? | No response with stimulation proximal or distal to the lesion (motor or sensory)
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| Degeneration of muscle fibers and infiltration by CT resulting in progressive muscle weakness is? | myotonia
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| myotonic discharges (trains of PWs) provoked by voluntary contraction or moving the needle - wax and wane (“divebomber”) NCS normal...what does this describe? | myotonia
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Created by:
txst spr 2009
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