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In medicine, pronator drift (also known as pyramidal drift) refers to a pathologic sign seen during a neurological examination. [1] Jean Alexandre Barré is credited with having first described it; thus it is sometimes known as the Barré test or sign. A positive result indicates palsy. This sign can appear due to an upper motor neuron lesion ...
Differences in positive/negative pathergy and severity of the reaction depend on disease activity, ethnicity, type of needle used for the prick test, among other factors. Pathergy test is done both orally and cutaneous. Orally, the lower lip is the site of testing. Appearance of any ulcer or papule indicates a positive pathergy reaction.
The direct and indirect Coombs tests, also known as antiglobulin test ( AGT ), are blood tests used in immunohematology. The direct Coombs test detects antibodies that are stuck to the surface of the red blood cells. [1] Since these antibodies sometimes destroy red blood cells they can cause anemia; this test can help clarify the condition.
A positive niacin test does not necessarily indicate the presence of M. tuberculosis because other Mycobacterium species can test positive for excess niacin. Along with each batch of specimens being tested, a positive control of M. tuberculosis and a negative control with no organism will be included. If the positive control tests negative ...
Positive-definiteness arises naturally in the theory of the Fourier transform; it can be seen directly that to be positive-definite it is sufficient for f to be the Fourier transform of a function g on the real line with g ( y) ≥ 0. The converse result is Bochner's theorem, stating that any continuous positive-definite function on the real ...
Positive deviance is a strength-based approach applicable to problems requiring behavior and social change. It is based on the following principles: [6] Communities already have the solutions; they are the best experts in solving their problems. Communities self-organize and are equipped with the human resources and social assets to solve ...
Continuity test. In electronics, a continuity test is the checking of an electric circuit to see if current flows (that it is in fact a complete circuit). A continuity test is performed by placing a small voltage (wired in series with an LED or noise-producing component such as a piezoelectric speaker) across the chosen path.
Dazzle camouflage, also known as razzle dazzle (in the U.S.) or dazzle painting, is a family of ship camouflage that was used extensively in World War I, and to a lesser extent in World War II and afterwards. Credited to the British marine artist Norman Wilkinson, though with a rejected prior claim by the zoologist John Graham Kerr, it ...