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10 Possible Causes for Compound Muscle Action Potential with Low Amplitude, Flaccid Paralysis of the Lower Extremity

  • Thyrotoxic Periodic Paralysis

    We herein report a 25-yr-old Korean man who suffered from flaccid paralysis of the lower extremities and numbness of hands.[ncbi.nlm.nih.gov] […] electrical compound muscle action potential on electromyography and no notable changes in amplitudes after low doses of epinephrinine; and typical acid-base and electrolyte[ncbi.nlm.nih.gov] […] of his lower extremities.[ncbi.nlm.nih.gov]

  • Tick Paralysis

    The clinical presentation appears as typical ascending flaccid paralysis.[cvbd.org] Neurophysiological studies reveal low-amplitude compound muscle action potentials with normal motor conduction velocities, normal sensory studies and normal response to repetitive[ncbi.nlm.nih.gov] After aprodromal phase (paraesthesias, restlessness, irritaility, fatigue, and myalgias) neurological symptoms will start with paralysis of the lower extremities.[cvbd.org]

  • Guillain-Barré Syndrome

    muscle action potentials reduced amplitude with relatively preserved conduction velocity implicates axonal neuropathy delayed/absent F waves implicates nerve root involvement[step2.medbullets.com] […] lymphocytic predominance) occurs in the late first week other CSF serologies typically normal Nerve conduction studies slowed conduction velocity reduced amplitude in compound[step2.medbullets.com] Spirometry to ensure adequate respiratory function intubate early if necessary Lumbar puncture albumin cytologic disassociation elevated protein mostly acellular (or with low[step2.medbullets.com]

  • Bickerstaff Brainstem Encephalitis

    Here, we present findings of a 46-year-old female who had BBE with flaccid lower extremity paralysis.[nature.com] (absent R2) suggested central dysfunction, whereas results of facial nerve conduction studies (low amplitudes of compound muscle action potentials), F-wave and H-reflex studies[ncbi.nlm.nih.gov] As has been previously seen in patients with BBE, our patient additionally had flaccid lower extremity paralysis, although no confirmatory electrodiagnostics were done to[nature.com]

  • Infantile Hemiplegia

    The impairment component of the test evaluates the upper and lower extremities, postural control and pain.[en.wikipedia.org] , AH - abductor hallucis muscle, Ampl- amplitude, L- left, R- right Figure 1 - Reduced motor nerves compound muscle action potential and slow conduction velocity with low[smj.org.sa] The impairment inventory focuses on the seven stages of recovery from stroke from flaccid paralysis to normal motor functioning.[en.wikipedia.org]

  • Miller-Fisher Syndrome

    AIDP is characterized by acute, areflexic flaccid paralysis.[cancertherapyadvisor.com] CBs resolved, distal compound muscle action potential (CMAP) amplitudes increased and SNAPs normalized on subsequent testing.[ncbi.nlm.nih.gov] Urinary Retention Hx of rapidly progressive bilateral leg weakness e.g. after a diarrhoea illness 3-4 weeks before Examn: - Lower limb LMN signs Hyporeflexia Flaccid paralysis[brainscape.com]

  • Cardiodysrhythmic Potassium-Sensitive Periodic Paralysis

    Weakness usually begins in the proximal muscles of the lower extremities and can progress to flaccid quadriplegia.[enotes.tripod.com] muscle action potential on electromyography and no notable changes in amplitudes after low doses of epinephrinine; and typical acid-base and electrolyte findings such as[enotes.tripod.com] The paralysis is usually symmetrical but may be asymmetrical and limited to strenuously exercised muscle.[enotes.tripod.com]

  • Normokalemic Periodic Paralysis

    In neurologic examination, there was symmetric flaccid paralysis with areflexia and impaired sensation in the lower extremities.[endocrine-abstracts.org] muscle action potential on electromyography and no notable changes in amplitudes after low doses of epinephrinine; and typical acid-base and electrolyte findings such as[scinapse.io] The classic description is that of an Asian male patient with Graves' disease presenting with acute onset flaccid, ascending paralysis of the lower extremities associated[najms.org]

  • Cervical Nerve Root Avulsion

    Lower plexus and total plexus injuries (often signified by flaccid paralysis of an entire arm, or diaphragmatic injury, or Horner’s syndrome) have worse prognoses.[pedclerk.bsd.uchicago.edu] A nerve conduction study performed 3-7 days after a peripheral nerve injury may show low-amplitude evoked compound muscle action potential (CMAP) with normal amplitude sensory[emedicine.medscape.com] Spontaneous movement of upper extremity by the end of the third month is an excellent prognostic sign.[pedclerk.bsd.uchicago.edu]

  • Familial Infantile Myasthenia

    Lower thoracic lesions result in flaccid paralysis of the lower extremities and bowel and bladder dysfunction.[glowm.com] A decremental pattern ( 10% difference in compound muscle action potential amplitude between the first and fourth or fifth stimulus) is the usual finding.[emedicine.medscape.com] Along with hypotonia, the infant with a lower cervical injury may have diaphragmatic breathing and Horner's syndrome.[glowm.com]

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