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Pathophysiology of multiple sclerosis information


At one end of an elongated structure is a branching mass. At the centre of this mass is the nucleus and the branches are dendrites. A thick axon trails away from the mass, ending with further branching which are labeled as axon terminals. Along the axon are a number of protuberances labeled as myelin sheaths.
Dendrite
Soma
Axon
Nucleus
Node of
Ranvier
Axon terminal
Schwann cell
Myelin sheath
Myelin sheath of a healthy neuron

Multiple sclerosis is an inflammatory demyelinating disease of the CNS in which activated immune cells invade the central nervous system and cause inflammation, neurodegeneration, and tissue damage. The underlying cause is currently unknown. Current research in neuropathology, neuroimmunology, neurobiology, and neuroimaging, together with clinical neurology, provide support for the notion that MS is not a single disease but rather a spectrum.[1]

There are three clinical phenotypes: relapsing-remitting MS (RRMS), characterized by periods of neurological worsening following by remissions; secondary-progressive MS (SPMS), in which there is gradual progression of neurological dysfunction with fewer or no relapses; and primary-progressive MS (MS), in which neurological deterioration is observed from onset.

Pathophysiology is a convergence of pathology with physiology. Pathology is the medical discipline that describes conditions typically observed during a disease state; whereas physiology is the biological discipline that describes processes or mechanisms operating within an organism. Referring to MS, the physiology refers to the different processes that lead to the development of the lesions and the pathology refers to the condition associated with the lesions.

  1. ^ Golan, Daniel; Staun-Ram, Elsebeth; Miller, Ariel (2016). "Shifting paradigms in multiple sclerosis". Current Opinion in Neurology. 29 (3): 354–361. doi:10.1097/WCO.0000000000000324. PMID 27070218. S2CID 20562972.

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