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Parapsoriasis
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D010267 |
[The term applied to a group of relatively uncommon inflammatory, maculopapular, scaly eruptions of unknown etiology and resistant to conventional treatment. Eruptions are both psoriatic and lichenoid in appearance, but the diseases are distinct from psoriasis, lichen planus, or other recognized dermatoses. Proposed nomenclature divides parapsoriasis into two distinct subgroups, PITYRIASIS LICHENOIDES and parapsoriasis en plaques (small- and large-plaque parapsoriasis).
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Parapsychology
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D010268 |
[Branch of psychology that deals with paranormal behavior and events such as telepathy, precognition, and clairvoyance, which are not explicable by present day "natural laws".
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Paraquat
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D010269 |
[A poisonous dipyridilium compound used as contact herbicide. Contact with concentrated solutions causes irritation of the skin, cracking and shedding of the nails, and delayed healing of cuts and wounds.
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Parasite Egg Count
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D010270 |
[Determination of parasite eggs in feces.
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Parasite Encystment
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D000069289 |
[Process by which certain parasites such as GIARDIA and ENTAMOEBA convert from the TROPHOZOITE to SCHIZONT when exposed to stress.
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Parasite Load
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D059208 |
[Measure of the number of the PARASITES present in a host organism.
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Parasitemia
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D018512 |
[The presence of parasites (especially malarial parasites) in the blood. (Dorland, 27th ed)
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Parasites
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D010271 |
[Invertebrate organisms that live on or in another organism (the host), and benefit at the expense of the other. Traditionally excluded from definition of parasites are pathogenic BACTERIA; FUNGI; VIRUSES; and PLANTS; though they may live parasitically.
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Parasitic Diseases
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D010272 |
[Infections or infestations with PARASITES. They are often contracted through contact with an intermediate vector, but may occur as the result of direct exposure.
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Parasitic Diseases, Animal
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D010273 |
[Animal diseases caused by PARASITES.
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Parasitic Sensitivity Tests
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D021261 |
[Tests that demonstrate the relative effectiveness of chemotherapeutic agents against specific parasites.
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Parasitology
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D010274 |
[The study of parasites and PARASITIC DISEASES.
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Parasomnias
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D020447 |
[Movements or behaviors associated with sleep, sleep stages, or partial arousals from sleep that may impair sleep maintenance. Parasomnias are generally divided into four groups: arousal disorders, sleep-wake transition disorders, parasomnias of REM sleep, and nonspecific parasomnias. (From Thorpy, Sleep Disorders Medicine, 1994, p191)
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Paraspinal Muscles
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D064170 |
[Deep muscles in the BACK whose function is to extend and rotate the SPINE and maintain POSTURE. It consists splenius, semispinalis, multifidus, rotatores, interspinales, intertransversarii and sacrospinalis.
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Parasympathectomy
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D017764 |
[The removal or interruption of some part of the parasympathetic nervous system for therapeutic or research purposes.
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Parasympathetic Fibers, Postganglionic
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D017777 |
[Nerve fibers which project from parasympathetic ganglia to synapses on target organs. Parasympathetic postganglionic fibers use acetylcholine as transmitter. They may also release peptide cotransmitters.
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Parasympathetic Nervous System
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D010275 |
[The craniosacral division of the autonomic nervous system. The cell bodies of the parasympathetic preganglionic fibers are in brain stem nuclei and in the sacral spinal cord. They synapse in cranial autonomic ganglia or in terminal ganglia near target organs. The parasympathetic nervous system generally acts to conserve resources and restore homeostasis, often with effects reciprocal to the sympathetic nervous system.
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Parasympatholytics
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D010276 |
[Agents that inhibit the actions of the parasympathetic nervous system. The major group of drugs used therapeutically for this purpose is the MUSCARINIC ANTAGONISTS.
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Parasympathomimetics
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D010277 |
[Drugs that mimic the effects of parasympathetic nervous system activity. Included here are drugs that directly stimulate muscarinic receptors and drugs that potentiate cholinergic activity, usually by slowing the breakdown of acetylcholine (CHOLINESTERASE INHIBITORS). Drugs that stimulate both sympathetic and parasympathetic postganglionic neurons (GANGLIONIC STIMULANTS) are not included here.
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Parasystole
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D017574 |
[A cardiac arrhythmia that is caused by interaction of two independently initiated cardiac impulses of different rates from two separate foci. Generally one focus is the SINOATRIAL NODE, the normal pacemaker. The ectopic focus is usually in the HEART VENTRICLE but can be in the HEART ATRIUM or the ATRIOVENTRICULAR NODE. Modulation of the parasystolic rhythm by the sinus rhythm depends on the completeness of entrance block surrounding the parasystolic focus.
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