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72 Possible Causes for Nerve Conduction Velocities Decreased or Normal

  • Neuropathy

    The left peroneal F wave response (a measure of nerve conduction velocity) was within the upper limits of normal. The left tibial F wave response was normal.[jfponline.com] The right sural SNAP demonstrated a mild decrease of the amplitude with a normal distal latency.[jfponline.com] The patient’s left sural peak latency and amplitude, a measure of sensory nerve action potential (SNAP), was absent.[jfponline.com]

  • Autonomic Neuropathy

    A neurophysiological abnormality involved an absence of sensory action potentials with relatively normal motor nerve conduction velocities.[ncbi.nlm.nih.gov] Biopsy of the sural nerve showed almost total loss of myelinated fibers with a mild decrease in unmyelinated fibers.[ncbi.nlm.nih.gov]

  • Benign Familial Neonatal Epilepsy

    Electroneurography and F-Wave showed normal conduction velocities, but repetitive afterdischarges following each nerve stimulus.[doi.org] Active innervation led to potentials of slightly decreased duration and increased polyphasia.[doi.org]

  • Bickerstaff Brainstem Encephalitis

    Motor nerve conduction study showed normal velocity in the four limbs but variable decreased amplitude at the median, ulnar, tibial, and peroneal nerves on both sides.[bmcresnotes.biomedcentral.com] On day 18 the distal and proximal CMAP amplitudes had further decreased, but the motor conduction velocity continued to be normal.[doi.org] Both motor conduction velocity and sensory conduction velocity were normal in the four limbs.[bmcresnotes.biomedcentral.com]

  • Wolfram Syndrome

    Echocardiogram, chest X-ray, ultra sonography of the abdomen, Doppler studies of lower limb vessels, nerve conduction velocity tests, complete ophthalmic and ENT evaluation[japi.org] R esults The biochemical and hematological results were within normal limits except raised HbA1C (14.8%), increased serum osmolality (301 mosm/kg) and decreased urine osmolality[japi.org]

  • Amyotrophic Lateral Sclerosis 1

    […] amplitude of CMAP and slowed motor conduction velocity denervation (fibrillations and positive waves) decreased recruitment in 3 extremities reinnervation abnormal spontaneous[orthobullets.com] […] fibrillation & fasciculation potentials normal sensory studies (SNAP, sensory nerve action potentials) Differentials Peripheral compressive neuropathy hyperreflexia and other[orthobullets.com] […] myelopathy or radiculopathy Laboratory diagnosis there are currently no laboratory tests that confirm the diagnosis EMG / NCS - shows denervation reinnervation widespread decreased[orthobullets.com]

  • Diabetic Neuropathy

    Slowed ulnar nerve conduction velocity predicted elevated mean stimulation current (r -0.35, P 0.002).[ncbi.nlm.nih.gov] ), as did subjects with decreased pain sensation (1.60 vs . 0.50 mA in subjects with normal sensation, P 0.038).[ncbi.nlm.nih.gov] Subjects with diminished pressure perception showed increased thresholds for the common peroneal nerve (median 1.30 vs . 0.57 mA in subjects with normal perception, P 0.042[ncbi.nlm.nih.gov]

  • Spinal Muscular Atrophy with Respiratory Distress Type 1

    […] muscles and absent somatosensory evoked response Age Examination Stimulation 9 weeks 8 – 10 months 11.5 months Motor nerve conduction Arm Normal, but decreasing amplitude[tidsskriftet.no] The following findings are untypical of normal spinal muscular atrophy: low motor nerve conduction velocity, sensory axonal neuropathy, normal electromyography in proximal[tidsskriftet.no] Low nerve conduction velocity (20 – 27 m/s) Low amplitude Slightly reduced nerve conduction velocity (25 m/s) Leg Low amplitude and low nerve conduction velocity (8 m/s) No[tidsskriftet.no]

  • Secondary Myopathy

    Decreased amplitude of sensory nerve action potentials Normal to minimally reduced nerve conduction velocity Reduced amplitude of muscle compound action potentials Reduced[aic.cuhk.edu.hk] conduction Critical illness polyneuropathy Critical illness myopathy Normal to minimally reduced nerve conduction velocity Reduced amplitude of muscle compound action potentials[aic.cuhk.edu.hk] […] prerequisite for diagnosis no/little sensory disturbance subclinical in 50% NB features may be modified by presence of co-existing septic encephalopathy Investigations EMG & nerve[aic.cuhk.edu.hk]

  • Amyotrophic Lateral Sclerosis

    […] amplitude of CMAP and slowed motor conduction velocity denervation (fibrillations and positive waves) decreased recruitment in 3 extremities reinnervation abnormal spontaneous[orthobullets.com] […] fibrillation & fasciculation potentials normal sensory studies (SNAP, sensory nerve action potentials) Differentials Peripheral compressive neuropathy hyperreflexia and other[orthobullets.com] […] myelopathy or radiculopathy Laboratory diagnosis there are currently no laboratory tests that confirm the diagnosis EMG / NCS - shows denervation reinnervation widespread decreased[orthobullets.com]

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