Mindblown: a blog about philosophy.
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Serial roentgenography
Repeated x-ray pictures taken of an area at defined but arbitrary intervals.
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Mucosal relief roentgenography
An x-ray examination of the intestinal mucosa after ingested barium has been removed and air under slight pressure has been injected. This leaves a light coat of barium on the mucosa and permits x-ray pictures of the fine detail of the mucosa.
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Roentgenium
A synthetic radioactive metal with a short-half life (formerly, Unununium; the symbol was Uuu); atomic number 111.
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Roentgen equivalent man
A measure of the effect that a specific dose of radiation has on human cells. It is expressed numerically as the product of the radiation absorbed dose (rad) and a quality factor (QF) specific for the type of radiation. The SI unit equivalent to the rem is the sievert (Sv). One rem is equal to…
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Rods and cones
The photoreceptor cells of the retina. They are between the pigment epithelium and the bipolar layer of neurons. The rods contain rhodopsin, which is stimulated by light; the cones contain one of three other photopigments, which are stimulated by various wavelengths of visible light (colors). Light-receiving cells on the retina that enable a person to…
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Retinal rod
A receptor in the retina that responds to the presence of light.
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Enamel rod
One of the minute calciumrich rods or prisms laid down by ameloblasts and forming tooth enamel.
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Body rocking
Rhythmic movements seen especially in the bored, lonely, cognitively impaired, visually impaired, or disturbed.
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Rocking
A technique in neurodevelopmental rehabilitation for increasing muscle tone in hypotonic patients through vestibular stimulation.
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Rocker knife
An assistive device for persons with limited upper-extremity function. It allows one-handed stabilization and cutting of food.
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