Category: Nf-Nz

Nucleoside bypass therapy: an experimental treatment designed to restore the normal number of deoxynucleotides (dNTPs) in the mitochondria of cells in patients with certain forms of mitochondrial DNA depletion syndrome. dNTPs are components of DNA. While most of a cell?s DNA is found within the nucleus, the mitochondria (structures within cells that are important for converting food into…

A technique in which single-stranded nucleic acids (DNA or RNA) are allowed to interact so that complexes called hybrids are formed by molecules with similar, complementary sequences. Through nucleic acid hybridization, the degree of sequence identity between nucleic acids can be determined and specific sequences detected in them. The hybridization can be carried out in solution…

Referring to the back of the neck (nape). For example, nuchal rigidity is a stiff neck, sometimes a symptom of meningitis.

Neural tube defect.

Nonsteroidal anti-inflammatory drug, a medication that is commonly prescribed or purchased over the counter to treat the inflammation associated with conditions such as arthritis, tendonitis, and bursitis. Examples of NSAIDs include aspirin, indomethacin (brand name: Indocin), ibuprofen (brand name: Motrin), naproxen (brand name: Naprosyn), piroxicam (brand name: Feldene), and nabumetone (brand name: Relafen). People who take certain…

Noonan syndrome.

NREM (non-rapid eye movement) sleep is dreamless sleep. During NREM, the brain waves on the electroencephalographic (EEG) recording are typically slow and of high voltage, the breathing and heart rate are slow and regular, the blood pressure is low, and the sleeper is relatively still. NREM sleep is divided into 4 stages of increasing depth leading to REM…

Originating or taking place in a hospital, acquired in a hospital, especially in reference to an infection. The term “nosocomial” comes from two Greek words: “nosus” meaning “disease” + “komeion” meaning “to take care of.” Hence, “nosocomial” should apply to any disease contracted by a patient while under medical care. However, common usage of the term “nosocomial”…

Bleeding from the blood vessels of the nose. The nose is rich in blood vessels and is situated in a vulnerable position on the face. As a result, any trauma to the face can cause bleeding, which may be profuse. Nosebleeds can also occur spontaneously when the nasal membranes dry out, crust, and crack, as is common in dry climates…

The external midline projection from the face. The purpose of the nose is to warm, clean, and humidify the air that a person breathes. In addition, it helps a person to smell and taste. The nose is divided into two passageways by a partition called the septum. Opening to these passageways are the nostrils. Bony projections, called turbinates,…