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30 Possible Causes for Compound Muscle Action Potential with Low Amplitude, Foot Drop

  • Tick Paralysis

    He had bilateral foot drop and slight weakness in multiple muscles, none different from his baseline.[nn.neurology.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] Medical history was significant for childhood polio with residual bilateral foot drop, Type 2 diabetes, bilateral lower extremity polyneuropathy, atrial fibrillation with[nn.neurology.org]

  • Guillain-Barré Syndrome

    Two years after the onset, the patient still suffered from residual leg weakness and foot drop.[scinapse.io] muscle action potentials reduced amplitude with relatively preserved conduction velocity implicates axonal neuropathy delayed/absent F waves implicates nerve root involvement[step2.medbullets.com] […] continued foot drop in 12 of the AFO patients.[physio-pedia.com]

  • Alcoholic Neuropathy

    Foot braces may also be helpful if you have problems with foot drop. If you have weakness in your arms, a wrist splint may be helpful.[patient.info] Compound muscle action potentials of peroneal or median nerves were absent, of low amplitude, or accompanied by mildly reduced nerve conduction velocity in 4 patients ( Table[jamanetwork.com] The distal latency of a very low compound muscle action potential of 1 peroneal nerve could have been suggestive of some degree of demyelination only in patient 2.[jamanetwork.com]

  • Mononeuritis Multiplex

    Mononeuritis multiplex is a peripheral sensorimotor neuropathy usually producing foot or wrist drop, commonly associated with necrotizing arteritis of small and medium-sized[ncbi.nlm.nih.gov] Nerve conduction study using surface electrodes showed low amplitude Compound muscle action potential (CMAP) of the right ulnar nerve with reduced conduction velocity and[neurologyindia.com] drop.[ncbi.nlm.nih.gov]

  • Familial Progressive Polyneuropathy

    Foot drop (foot can't be picked up or held horizontal) Progressive deformity of leg ("inverted champagne bottle") or foot (abnormally high arched feet, flat feet, hammer toes[peripheralneuropathycenter.uchicago.edu] Patients have relatively normal nerve conduction velocities but low amplitude sensory nerve action potentials and compound muscle action potentials.[merckmanuals.com] Patients can also suffer from high arched feet, hammer toes, foot drop, foot deformities, and scoliosis.[en.wikipedia.org]

  • Hereditary Motor and Sensory Neuropathy

    There can be high arched feet, hammer toes, foot drop, and foot deformities, and possibly scoliosis. Who gets Hereditary Motor Sensory Neuropathy?[aanem.org] Compound muscle action potentials are either absent or low amplitude with motor conduction velocities ranging from 3 to 10 meters per second.[academlib.com] […] dorsiflexor weakness Foot drop 0009027 Frequent falls 0002359 Hammertoe Hammer toe Hammertoes [ more ] 0001765 Hypertonia 0001276 Limb muscle weakness Limb weakness 0003690[rarediseases.info.nih.gov]

  • Neuropathy

    Postoperative range of motion exercises and physical therapy allowed resolving foot drop 1 year after surgery. Copyright 2017 Elsevier Inc. All rights reserved.[ncbi.nlm.nih.gov] Patients have relatively normal nerve conduction velocities but low amplitude sensory nerve action potentials and compound muscle action potentials.[merckmanuals.com] Injury to the common peroneal nerve results in foot drop and inversion (turning inward) of the foot.[vermontspineworks.com]

  • Charcot-Marie-Tooth Disease Type 2S

    (high arch) Type 2 – Neuronal Usually less disabled than Type 1 Onset in second decade of life or later Most commonly leads to foot drop Patients will present with foot pain[paleyinstitute.org] Electrodiagnostic studies showed normal or moderately slowed motor nerve conduction velocities (MNCVs) but very low motor compound muscle action potential (CMAP) amplitudes[jnnp.bmj.com] Most people with CMT develop muscle atrophy and weakness in the arms and legs, foot drop, difficulties using the upper limbs, loss of sensation, and varying degrees of walking[hnf-cure.org]

  • Inclusion Body Myositis

    A foot-drop can increase the likelihood of tripping.[en.wikipedia.org] However, the low compound muscle action potential amplitudes could be explained by the loss of excitable muscle tissue that occurs in myopathies.[jamanetwork.com] The muscles that lift the front of the foot may also be affected early on causing “foot drop” and a tendency to trip.[understandingmyositis.org]

  • Distal Hereditary Motor Neuropathy Type 1

    The supportive treatment for HNPP can include transient bracing (e.g., a wrist splint or ankle-foot orthosis) which may become permanent in some cases of foot drop.[bcbst.com] Compound muscle action potentials are either absent or low amplitude with motor conduction velocities ranging from 3 to 10 meters per second.[academlib.com] Orthotic devices are widely used - eg, plantars (correcting foot position), ankle-foot orthoses (to overcome foot drop and facilitate walking - custom fitting may be required[patient.info]

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