Category: M
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Mad cow disease
Bovine spongiform encephalopathy. Also known as bovine spongiform encephalopathy (BSE); a chronic, degenerative disorder that affects the central nervous system of cattle. Since 1996, concerns have arisen that there is a link between a disease in humans called new variant Creutzfeldt-Jakob disease and mad cow disease. Both are fatal brain diseases with unusually long incubation…
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Macrocytes
Large immature precursors of red blood cells found in the circulation in pernicious anaemia and in folic acid deficiency, due to impairment of the normal maturation of red cells; hence macrocytic anaemia. The largest type of erythrocyte. An unusually large red blood cell found in people who have pernicious anaemia. Abnormally large erythrocyte (red blood…
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Megaloblastic anaemia
Release into the circulation of immature precursors of red blood cells, due to deficiency of either folic acid or vitamin B12. A prominent form of anemia, characterized by a diminished level of the oxygen-carrying pigment hemoglobin in the bloodstream, is megaloblastic anemia. This condition arises due to a deficiency of either vitamin B12 or another…
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Male erectile disorder
Refers to the inability to attain or maintain an erection until completion of sexual activity. The persistent or recurrent inability to attain, or to maintain until completion of the sexual activity, an adequate erection. The disturbance causes marked distress or interpersonal difficulty. The difficulty cannot be attributed to a medical condition, substance abuse, or medications.…
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Male orgasmic disorder
Refers to absence of, or delay in attaining, orgasm following a normal sexual excitement phase during sexual activity that is adequate in focus, intensity, and duration.
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Mysophobia
The fear of dirt and germs.
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Myriacit
A culture-specific syndrome.
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Myoclonus
A brief, involuntary twitching of a muscle or a group of muscles. Myoclonus is one of several signs in a wide variety of nervous system disorders such as multiple sclerosis, parkinson’s disease, alzheimer’s disease, creutzfeldt-jakob disease, and some forms of epilepsy. In almost all instances in which myoclonus is caused by central nervous system (CNS)…
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Myelin
The insulating sheath that surrounds nerve cells, enabling them to conduct impulses between the brain and other parts of the body. When myelin becomes damaged, neurodegenerative autoimmune diseases, such as multiple sclerosis, can develop. Fatty, white substance forming medullary sheath around nerve. The protective fat and protein covering around the axons of many nerves. The…
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Mutism
Refusal to speak; may be for conscious or unconscious reasons. Persistent inhibition of speech seen in some severe forms of mental illness. A condition of being unable to speak. A refusal or an inability to speak. The condition of being unable to speak. Inability or refusal to speak. It may be innate, the result of…