RETINAL RODS
Photoreceptive cells located in the retina which are very sensitive to dim light. See also: retinal bipolar cells; scotopic vision.
RETROGRADE DEGENERATION
Decay in the body of a neuron after injury is sustained to its axon. Compare with: anterograde degeneration.
RHESUS MONKEY
Native to India, Afghanistan, and Nepal, a diminutive primate regularly employed in research for physiology, biology, and medicine due to…
RICCO'S LAW
Principle of the function of the visual threshold relating to the force of a visual image and its location on…
RIGHTING REFLEX
The innate ability of an organism to assume an optimal position when it has been unbalanced or knocked over. Also…
RISK LEVEL
Lack of aversion to a specific amount of risk involved in making erroneous decisions, in a null hypothesis situation. See…
RITUALIZATION
Behavior which typically occurs in a member of a specific species and is highly stereotypical and independent of direct physiological…
ROD-AND-FRAME TEST (RFT)
An assessment employed to research the function of optical and gravitational signals in estimating the visual vertical. This is the…
ROLE MODEL
Person or group who knowingly or unknowingly inspires others to imitate their persona; role model may be a real person,…
ROOMING-IN
Procedure in certain hospitals which allows a newborn to stay in the same room as the mother following birth, giving…
ROTATIONAL AFTEREFFECT (RAE)
Movement after-effect that is generated by the cessation of a revolving stimulus . Once the rotational motion of the stimulus…
R-TECHNIQUE FACTOR ANALYSIS
Component evaluation of an association matrix wherein changeable quantities are interconnected; or rather, associations between the factors themselves are analyzed.
RUMINATION DISORDER
Childhood eating dysfunction identified in DSM-IV-TR wherein the affected individual regurgitates partly processed food items and chews it again before…