<unk> es may be classified in different ways, such as by cause, by presentation, or by classes of<unk> , in terms of which part of the nerve cell is affected mainly: the axon, the myelin sheath, or the cell body. Action potential propagation in myelinated neurons is faster than in unmyelinated neurons(left) * Distal axonopathy, is the result of interrupted function of the peripheral nerves. It is the most common response of neurons to metabolic or toxic disturbances, and may be caused by metabolic diseases such as diabetes, kidney failure, connective tissue disease, deficiency syndromes such as malnutrition and alcoholism, or the effects of toxins or drugs such as chemotherapy. They may be divided according to the type of axon affected (large-fiber, small-fiber, or both), the most distal portions of axons are usually the first to degenerate, and axonal atrophy advances slowly toward the nerve's cell body. However, if the cause is removed, then regeneration is possible, although the prognosis depends on the duration and severity of the original stimulus. People with distal axonopathies usually present with sensorimotor disturbances such as amyotrophic lateral sclerosis * Myelinopathy, is due to a loss of myelin or of the Schwann cells. This demyelination slows down or completely blocks the conduction of action potentials through the axon of the nerve cell (neurapraxia). The most common cause is acute inflammatory demyelinating<unk>  AIDP, the most common form of Guillain–Barré syndrome (although other causes include chronic inflammatory demyelinating<unk>  ) * Neuronopathy is the result of issues in the peripheral nervous system <unk> S) neurons. They may be caused by motor neurone diseases, sensory neuronopathies, toxins, or autonomic dysfunction. Neurotoxins such as chemotherapy agents may cause neuronopathies.
Polyneuropathy
Lead poisoning
Tropical neuropathy
Polyradiculoneuropathy
Peripheral mononeuropathy
Giant axonal neuropathy
Vasculitic neuropathy
Diabetic neuropathy