| NARES: |
Nostrils. |
| NASOFRONTAL DUCT: |
Channel connecting the frontal sinus with the cavity of the nose. |
| NASOGASTRIC TUBE (N.G. TUBE): |
A plastic tube with a number of openings at the lower end, passed through
the nose into the stomach for the purpose of decompressing gas and draining
accumulated liquids. |
| NASOPHARYNX: |
The area of the upper throat behind the nose. |
| NATAL: |
Pertaining to birth. |
| NAUSEA: |
Nausea is the urge to vomit. It can be brought by many causes including,
systemic illnesses, such as influenza, medications, pain, and inner ear
disease. |
| NECROSIS: |
Death of a portion of tissue. |
| NEO-: |
Prefix denoting new. |
| NEONATAL: |
The first four weeks after a child's birth. |
| NEPHRO-: |
Relating to the kidneys. |
| NERVE: |
A nerve is a bundle of fibers that uses electrical and chemical signals
to transmit sensory and motor information from one body part to another.
See nervous system. |
| NERVE ROOT: |
A sheaf of nerve fibres entering and leaving a segment of the spinal
cord. |
| NERVOUS SYSTEM: |
The nervous system is the body tissue that records and distributes
information in the body using electrical and chemical transmission. It
has two parts. The "central" nervous system is comprised of the brain and
spinal cord. The "peripheral" nervous system is the nerve tissue that transmits
sensation and motor information back and forth from the body to the central
nervous system. |
| NEURAL TUBE: |
A structure in early fetal life that develops into the brain, spinal
cord, spinal nerves and spine. |
| NEURAL TUBE DEFECT: |
A birth defect resulting in improper development of the brain or spinal
cord. |
| NEUROCUTANEOUS: |
A group of conditions that combine skin and sensory or nervous difficulties. |
| NEUROLOGICAL: |
Pertaining to the nervous system. |
| NEUROMUSCULAR: |
Pertaining to the nerves and muscles. |
| NEURON: |
A complete nerve cell. |
| NEUROPATHY: |
Group of symptoms caused by abnormalities in sensory or motor nerves.
Symptoms include tingling and numbness in hands or feet, followed by gradually
progressive muscular weakness. The three major forms of nerve damage are:
peripheral neuropathy, autonomic neuropathy, and mononeuropathy. The most
common form is peripheral neuropathy, which mainly affects the feet and
legs. |
| NEUROTRANSMITTER: |
Chemicals that act as messengers between cells in the brain and nervous
system; they transmit impulses across the gap from a neuron to another
neuron, a muscle, or a gland. |
| NEUTROPHILS: |
The larger and physiologically most numerous class of infection-fighting
white blood cells, characteristically even more numerous in generalised
bacterial infections. |
| NEVUS: |
A mole or birthmark. |
| NON-CONSANGINEOUS: |
This means that the parents of the proband were not related. |
| NORMAL SALINE: |
Salt solution at the same concentration as in the body fluids. |
| NORMAL SINUS RHYTHM: |
Regular rhythm of the heart, at regular rates (depending whether resting
or mildly exercising), originating in electrical control by the usual (sino-atrial
node) pacemaker of the heart. |
| NUCLEUS: |
Center portion of cells essential for cell growth, nourishment and
reproduction. |
| NUCLEUS BASALIS OF MEYNERT: |
A small group of cholinergic nerve cells in the forebrain and connected
to areas of the cerebral cortex. |
| NUTRIENTS: |
Proteins, carbohydrates, fats, vitamins, and minerals. These are provided
by food and are necessary for growth and the maintenance of life. |
| NYSTAGMUS: |
Uncontrolled, involuntary rhythmic rapid eye movements which may be
congenital or acquired. Usually in response to movement of the head. |
