Rohypnol
The trade name for flunitrazepam, which has been abused as a ‘date rape’ drug. Rohypnol produces sedative-hypnotic effects including muscle relaxation and amnesia. It can produce physical and psychological dependence and can be lethal when mixed with alcohol and/or other depressants.
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- ROMA
Representational oligonucleotide microarray analysis. A method for the detection of genomic aberrations between any two samples of DNA. ROMA measures the relative concentration of DNA in the two samples by hybridizing differentially labeled samples to a set of probes. By arraying oligonucleotide probes designed from the human genome sequence, and hybridizing with “representations” from the […]
- Rooting reflex
A reflex that is seen in normal newborn babies, who automatically turn the face toward the stimulus and make sucking (rooting) motions with the mouth when the cheek or lip is touched. The rooting reflex helps to ensure successful breastfeeding.
- Rorschach test
A common psychological test that involves using inkblots that show enigmatic and highly ambiguous shapes. Ten standardized blots are shown, one at a time, to a person, and the person’s responses are recorded, to determine what the person perceives about the inkblots.
- Rosacea
mainly the forehead, the chin, and the lower half of the nose. The tiny blood vessels in these areas enlarge (dilate) and become more visible through the skin, appearing like tiny red lines (telangiectasias). Pimples that look like teenage acne can occur. Rosacea occurs most often between the ages of 30 and 60, especially in […]
- Rosacea keratitis
A condition affecting the eyes in about half of all cases of rosacea. It is characterized by burning and grittiness of the eyes (conjunctivitis). If this is not treated, inflammation of the cornea may impair vision.