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chemical transmitted by a neuron and essential for the activity of adjacent neurons, muscles, or other organs. Important neurohumors are acetylcholine, serotonin, dopamine, and epinephrine.  

Tumor, usually benign, of the sheath surrounding a nerve. A tumor that originates from the protective sheath around a nerve. This condition is also known as neurofibroma or neurilemmoma.  

Process whereby all or part of a nerve, usually of the peripheral nervous system, replaces damaged or missing portions with normal tissue. Typically, nerve regeneration is a slow process; most peripheral nerves grow at a rate of one millimeter or so every thirty days.  

Abnormal condition in which a nerve is subjected to repeated or long-term compression, resulting m nerve damage, often with symptoms of pain and muscle weakness. It most commonly involves nerves located near joints subject to inflammation or swelling, as in arthritis or pregnancy. Carpal tunnel syndrome is a type of nerve entrapment. The compression of…

Harmful pressure on a nerve, causing nerve damage and muscle weakness; nerves over rigid prominences are particularly vulnerable. Rest and alternation of any causal activities often heals the damage.  

Abnormal condition, marked by edema, the presence of large amounts of protein in the urine, and lower than normal levels of albumin in the blood. Often accompanied by nausea, weakness, and loss of appetite, it is usually associated with disease of the glomerulus (glomerulonephritis) or occurs as a complication of many systemic diseases (e.g., multiple…

Death of cells of the kidney arterioles associated with hypertension; symptoms include, in addition to high blood pressure, headache, blurred vision, and often an enlarged heart; if hypertension cannot be controlled, it can lead to kidney failure and heart failure; also called nephrosclerosis.  

Death of a live- born infant within the first 28 days of life. The passing away of an infant born alive within the initial four weeks of life is termed neonatal death. This type of death is categorized as either early or late: early neonatal deaths transpire during the first week of life, while late…

Unusual reaction to acupuncture consisting of nausea and dizziness; relieved by removing the needles.  

Severe inflammation and infection, usually by bacteria, of the tissue surrounding the hip or back muscles; is usually severe and may be fatal. Treatment involves prompt recognition, antibiotics, and, often, surgery. A rare, severe infection caused by organisms including certain streptococcus organisms that attack and rapidly destroy skin and muscle tissue. Immediate antibiotic treatment is…