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Polyneuropathy; Micrograph showing peripheral neuropathy . Polyneuropathy is peripheral neuropathy occurring in the same areas on both sides of the body. Specialty: Neurology Symptoms: Ataxia [1] Causes: Hereditary (Charcot–Marie–Tooth disease), and acquired (alcohol use disorder) [2] Diagnostic method: Nerve conduction study, urinalysis [3 ...
Alcoholic polyneuropathy usually has a gradual onset over months or even years, although axonal degeneration often begins before an individual experiences any symptoms. [ 2 ] The disease typically involves sensory issues and motor loss, as well as painful physical perceptions, though all sensory modalities may be involved. [ 3 ]
Peripheral neuropathy may be classified according to the number and distribution of nerves affected (mononeuropathy, mononeuritis multiplex, or polyneuropathy), the type of nerve fiber predominantly affected (motor, sensory, autonomic), or the process affecting the nerves; e.g., inflammation (), compression (compression neuropathy), chemotherapy (chemotherapy-induced peripheral neuropathy).
Sensory neuronopathy differs from the more common length dependent axonal polyneuropathies (such as diabetic sensorimotor polyneuropathy) in that the symptoms do not progress in a distal to proximal pattern (starting in the feet and progressing to the legs and hands), rather symptoms develop in a multifocal, asymmetric, and non-length dependent ...
In its traditional manifestation, chronic inflammatory demyelinating polyneuropathy is characterized by symmetric, progressive limb weakness and sensory loss, which typically starts in the legs. Patients report having trouble getting out of a chair, walking, climbing stairs, and falling.
Neuropathy disorders usually have onset in childhood or young adulthood. Motor symptoms seem to be more predominant than sensory symptoms. [2] Symptoms of these disorders include: fatigue, pain, lack of balance, lack of feeling, lack of reflexes, and lack of sight and hearing, which result from muscle atrophy.
Acute motor axonal neuropathy (AMAN) is a variant of Guillain–Barré syndrome. It is characterized by acute paralysis and loss of reflexes without sensory loss. Pathologically , there is motor axonal degeneration with antibody-mediated attacks of motor nerves and nodes of Ranvier .
Nerve biopsy would show axonal neuropathy, [7] but it is no longer indicated. A muscle biopsy of critical illness myopathy would show selective loss of thick filaments in muscle, demonstrating the loss of myosin and the presence of muscle cell death . [1] [11] When muscles lose stimulation from neurons, they can undergo degeneration.
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