| NTCP | noninvasive transcutaneous cardiac pacing; normal tissue complication probability |
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| NTFOM | normal tissue complication-based figure-of-merit |
| EDDS | electronic development delivery system |
| EMRS | electronic medical record system |
| NEISS | National Electronic Injury Surveillance System |
| controlled mechanical ventilation | Artificial ventilation in which all inspirations are provided by positive pressure applied to the airway. Synonym: continuous positive pressure breathing, continuous positive pressure ventilation, intermittent positive pressure breathing, intermittent positive pressure ventilation. (05 Mar 2000) |
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| stage mechanical | <microscopy> A small fixture, either built into the light microscope stage or attached separately, it holds the specimen slide and has two horizontal screw adjustments at right angles to each other. The screw motions permit the specimen to be moved as desired. The quantitative type has vermer scales for reading the amount of displacement to 0.1 mm. This stage is sometimes called the traversing stage. (05 Aug 1998) |
| stress, mechanical | A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area. (12 Dec 1998) |
| tubelength mechanical | <microscopy> This distance is measured from where the objective screws on to where the eyepiece fits in. The American standard mechanical tubelength is 160 mm. For Leitz objectives it was once 170 mm. (05 Aug 1998) |
| uniform mechanical code | (UMC) A code sponsored by the International Association of Plumbing and Mechanical Officials and the International Conference of Building Officials, adopted and amended by the Oregon Department of Commerce. The UMC contains requirements for the installation and maintenance of heating, ventilating, cooling, and refrigeration systems. (05 Dec 1998) |
| coeliac (nervous) plexus | The most substantial, superior portion of the abdominal aortic plexus lying anterior to the aorta at the level of origin of the coeliac trunk (vertebral level T-12); the coeliac ganglia lie within the plexus; it is formed by contributions from the greater splanchnic and vagus (especially the posterior or right vagus) nerves and communicating branches to and from the superior mesenteric and renal plexuses and ganglia; most sympathetic, parasympathetic and visceral afferent fibres serving the abdominal viscera pass through this plexus. Synonym: plexus coeliacus, solar plexus. (05 Mar 2000) |
| Henle's nervous layer | The layers of the retina from the outer plexiform to the nerve fibre layer inclusive. Synonym: Henle's nervous layer. (05 Mar 2000) |
| high pressure nervous syndrome | <syndrome> A syndrome of tremors, nausea, dizziness, and decreased motor and mental performance which develops in those who dive deeply (c. 1000 ft) usually breathing a mixture of oxygen and helium. Nitrogen is not a factor as it is in inert gas narcosis. (12 Dec 1998) |
| nervous | 1. Possessing nerve; sinewy; strong; vigorous. "Nervous arms." 2. Possessing or manifesting vigor of mind; characterised by strength in sentiment or style; forcible; spirited; as, a nervous writer. 3. Of or pertaining to the nerves; seated in the nerves; as, nervous excitement; a nervous fever. 4. Having the nerves weak, diseased, or easily excited; subject to, or suffering from, undue excitement of the nerves; easily agitated or annoyed. "Poor, weak, nervous creatures." (Cheyne) 5. Sensitive; excitable; timid. "Our aristocratic class does not firmly protest against the unfair treatment of Irish Catholics, because it is nervous about the land." (M. <anatomy> Arnold) Nervous fever, the specialized coordinating apparatus which endows animals with sensation and volition. In vertebrates it is often divided into three systems: the central, brain and spinal cord; the peripheral, cranial and spinal nerves; and the sympathetic. See Brain, Nerve, Spinal cord, under Spinal, and Sympathetic system. In Appendix. Nervous temperament, a condition of body characterised by a general predominance of mental manifestations. Origin: L. Nervosus sinewy, vigorous: cf. F. Nerveux. See Nerve. Source: Websters Dictionary (01 Mar 1998) |
| nervous asthenopia | Asthenopia due to functional or organic nervous disease. (05 Mar 2000) |
| nervous asthma | Asthma precipitated by psychic stress. (05 Mar 2000) |
| nervous breakdown | Nonmedical term for an emotional or mental illness; often a euphemism for a psychiatric disorder. (05 Mar 2000) |
| nervous colon syndrome | <syndrome> A common gastrointestinal disorder characterised by abdominal pain, bloating, mucous in stools, and irregular bowel habits with alternating diarrhoea and constipation, symptoms that tend to be chronic and wax and wane over the years. Although nervous colon syndrome can cause chronic recurrent discomfort, it appears to be an abnormal condition of gut contractions (motility) and does not lead to any serious organ problems. Diagnosis usually involves excluding other illnesses. Treatment is directed toward relief of symptoms and includes high fibre diet, exercise, relaxation techniques, avoidance of caffeine, milk products and sweeteners, and medications. Alternative names include irritable bowel syndrome, spastic colitis, and mucus colitis. (12 Dec 1998) |
| nervous dyspepsia | Dyspepsia associated with nervousness, tension, or anxiety. Synonym: functional dyspepsia. (05 Mar 2000) |
| nervous indigestion | Indigestion caused by emotional upsets or stress. (05 Mar 2000) |