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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «N»:

  1. Neurofibromatosis type 2 Neurofibromatosis type 2
    Neurofibromatosis type 2: Abbreviated NF2. A genetic disorder characterized by the growth of benign tumors of both acoustic nerves (the nerves to the ears). These tumors are called acoustic neuromas or, more precisely, vestibular schwannomas. They cause tinnitus (ringing in the ears), hearing loss, ...
  2. Neurofibromatosis, bilateral acoustic Neurofibromatosis, bilateral acoustic
    Neurofibromatosis, bilateral acoustic: See: Neurofibromatosis type 2....
  3. Neurofibromatosis, central Neurofibromatosis, central
    Neurofibromatosis, central: See: Neurofibromatosis type 2....
  4. Neurogenesis Neurogenesis
    Neurogenesis: The process by which new nerve cells are generated. In neurogenesis, there is active production of new neurons, astrocytes, glia, and other neural lineages from undifferentiated neural progenitor or stem cells. Neurogenesis is considered a rather inactive process in most areas of the a...
  5. Neurogenic Neurogenic
    Neurogenic: Starting with or having to do with the nerves or the nervous system....
  6. Neurogenic shock Neurogenic shock
    Neurogenic shock: A type of shock (a life-threatening medical condition in which there is insufficient blood flow throughout the body) that is caused by the sudden loss of signals from the sympathetic nervous system that maintain the normal muscle tone in blood vessel walls. The blood vessels relax ...
  7. Neuroleptic Neuroleptic
    Neuroleptic: A term that refers to the effects of antipsychotic drugs on a patient, especially on his or her cognition and behavior. Neuroleptic drugs may produce a state of apathy, lack of initiative and limited range of emotion. In psychotic patients, neuroleptic drugs cause a reduction in confus...
  8. Neurological Neurological
    Neurological: Having to do with the nerves or the nervous system....
  9. Neurological Disorders and Stroke, Nat'l Institut Neurological Disorders and Stroke, Nat'l Institut
    Neurological Disorders and Stroke, National Institute of (NINDS): One of the National Institutes of Health in the U.S., the NINDS's mission is to "support and conduct research and research training on the normal structure and function of the nervous system and on the causes, prevention, diagnosis, ...
  10. Neurologist Neurologist
    Neurologist: A doctor who specializes in the diagnosis and treatment of disorders of the nervous system....
  11. Neurology Neurology
    Neurology: The medical specialty concerned with the diagnosis and treatment of disorders of the nervous system -- the brain, the spinal cord, and the nerves. Thumbnail history of neurology -- The first scientific studies of nerve function were done in the 18th century. However, clinical neurology r...
  12. Neuroma Neuroma
    Neuroma: A tumor that arises in nerve cells....
  13. Neuroma, acoustic Neuroma, acoustic
    Neuroma, acoustic: A benign tumor that may develop on the hearing and balance nerves near the inner ear. The tumor results from an overproduction of Schwann cells -- small sheet-like cells that normally wrap around nerve fibers like onion skin and help support the nerves. When growth is abnormally e...
  14. Neuroma, optic Neuroma, optic
    Neuroma, optic: A benign tumor of the optic nerve....
  15. Neuromuscular Neuromuscular
    Neuromuscular: Pertaining to both nerves and muscles, as in neuromuscular blockade by an anesthetic agent, the neuromuscular junction (the meeting place of a nerve and a muscle fiber), and neuromuscular transmission (the transfer of "information" from the nerve to the muscle)....