Polymyositis - reduced amplitude and duration of motor units
Motor neurone disease - fibrillation due to denervation
Myasthenia gravis - diminished response to repetitive stimulation
Lambert Eaton syndrome - enhanced response to repeated stimulation
Myotonia dystrophia - high frequency action potentials (Kamikazee discharge)
Demyelinating neuropathy - slow nerve conduction velocity
Axonal neuropathy - diminished action potential
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