R

n23

RETINAL OSCILLATIONS

Vacillations of visual input which continue following limited visual stimulus.

RETROGRADE AMNESIA

Loss of ability to recall events which happened just prior to the onset of amnesia. See also: temporal gradient. Compare

REVERBERATORY CIRCUIT

Neural circuits which as essentially always active, allowing impulses to repeatedly circulate after having been triggered by an initial stimulus

REVERSION

Hereditary trait which has not expressed itself in the parent, allowing offspring to look more like a distant ancestor than

RHEOENCEPHALOGRAPHY

Technique which allows continuous registration of cerebral blood flow.

RIBOT'S LAW 1

Theory which states that the newest memories are the most susceptible to interruption from brain damage.

RIGHT-HEMISPHERE CONSCIOUSNESS

Assumption which is made regarding the right cerebral hemisphere as being conscious, as with the left hemisphere, despite the fact

RISK FACTOR

Any behavioral, hereditary, environmental, or other consideration which increases the likelihood of developing a disease or disorder, or becoming involved

RITUAL AHUSE

Defined as systematic sexual, physical, and psychological abuse which is carried out over a long period of time, usually against

ROD VISION

Vision which is completely dependent on structures within the retina called rods, which function properly only in dim lighting conditions.

ROLE EXPECTATIONS

Beliefs concerning the qualities, behaviors, and characteristics suitable to a specific role; could be conveyed to the role's holder by

ROMBERG'S SIGN

A diagnostically important signal of specific neurological afflictions, such as locomotor ataxia, comprised of a swaying movement and disequilibrium when

ROTATION SYSTEM

Strategy of group psychoanalysis wherein the counselor focuses on every individual in succession in the company of various other group

R-STRATEGY

Reproductive technique that entails an elevated tempo of reproduction with minimal parental expenditure. It means increasing the pace of reproduction

RUMINATION

Obsessive thoughts concerning extreme, recurring ideas or concepts that interrupt other types of cognitive actions; a typical element of obsessive-compulsive