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31 Cards in this Set
- Front
- Back
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When would you order electodiagnostics?
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1. unexplainable limb pain
2. numbness and weakness of extremities |
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What are some neuromuscular disorders?
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motor neuron disease, radiculopathy, plexopathy, and neuropathy
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What kind of neuropathy was stressed in this lecture?
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mononeuropathy
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Name 2 neuromuscular disorders:
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Myasthenia Gravis
Eaton-Lambert Syndrome |
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What is an electrodiagnostic study?
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functional test that assesses peripheral nervous system and neuromuscular function (gives info on type, location, and severity of injury)
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What are the components of electrodiagnostics?
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1. Nerve conduction study (NCS)
2. Electromyography (EMG) 3. Repetitive nerve stimulation (RNS) (good for NM junction problems) 4. Somatosensory Evoked Potentials (SEP) (good for mapping sensory pathway) |
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Nerve conduction study uses electrical stimulation and consists of what 2 things?
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sensory nerve action potentials (SNAP) and compound motor action potentials (CMAP)
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What electrodiagnostic tests involves passively detecting peripheral nerve electrical activity using a needle?
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electromyography (EMG)
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EMG (passive portion)evaluates what 2 things?
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insertional and resting activity
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EMG (active portion) evaluates what 2 things?
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recruitment and motor unit size/shape
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In myopathy, is recruitment increased or decreased? In neuropathy?
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increased; decreased
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Is motor unit size and shape increased or decreased in myopathy? In neuropathy?
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decreased; increased
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Somatosensory Evoked Potentials (SEP) is helpful in diagnosing what disease?
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MS
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In addition to unexplained weakness or numbness, why else might an electrodiagnostic test be done?
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prognostic to determine need for surgery; if neuro problems persist after repair
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What should you tell the patient about electrodiagnostics?
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2 parts to test; needle and electric stimulation (uncomfortable); important test; does not replace MRI or other tests
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If electrodiagnostics are normal, this may indicate that neuro problems lie where?
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CNS
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If electrodiagnostics are normal and physical problems, what might be the problem?
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pseudoradicular problems
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If electrodiagnostics are abnormal and localized, what then?
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get confirmatory tests such as MRIs, and make referrals as necessary
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If electrodiagnostics are abnormal and non-localized, what then?
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condider referral or work up your hunches
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Brachial plexopathies:
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Erb’s palsy
Klumpke palsy |
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Mononeuropathies list:
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Median
Ulnar Radial Axillary Musculocutaneous |
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What does C5 myotome test? C6? C7? C8? T1?
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1. elbow flexion
2. wrist extension 3. elbow extension 4. finger flexion 5. finger abduction |
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Where is dermatome for C2? C3? C4? C5? C6? C7? T1?
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1. posterior head/anterior neck
2. anterior neck 3. necklace line to shoulders 4. proximal shoulders 5. lateral forearm 6. middle finger 7. medial forearm |
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C5–C6 nerve roots or upper trunk lesion?
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erb's palsy
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C8–T1 nerve roots or lower trunk lesion?
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klumpke's palsy
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How can you differentiate radiculopathy vs. plexopathy vs. peripheral neuropathy?
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1. radiculopathy has changes in DTR's
2. plexopathy will show multi-radiculopathy (DTR can be affected in one area, numbness in an unrelated area, etc.) |
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What is a clinical sign of erb's palsy?
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waiter’s tip position
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Klumpke's palsy shows what clinical sign? What other disease shows this?
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claw hand; ulnar neuropathy
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What are the median neuropathy syndromes?
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pronator syndrome, anterior interosseous syndrome, and carpal tunnel syndrome
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What are the ulnar neuropathy syndromes?
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tardy ulnar palsy, cubital tunnel syndrome, and guyon's canal
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What are the radial neuropathy syndromes?
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posterior interosseus syndrome, superficial radial neuropathy,
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