Opponent System
Opponent System - Related Videos
09:20
Color Afterimages
0 Views •
2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Human color vision is impressive. People with normal color vision can tell apart millions of individual hues. Most amazingly, this ability is achieved with fairly simple hardware. Part of the power of human color vision comes from a clever bit of engineering in the human brain. There, color perception relies on what is known as an 'opponent system.' This means that the presence of one kind of stimulus is treated as evidence for...
03:13
Drosophila Aggression Assay: A Method to Test Behavioral Plasticity in Flies
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2023
Aggression is an innate behavior and previous fighting experience affects fighting strategy and outcome of later contests in flies. This video describes an assay used to study Drosophila's aggressive behavior. The example protocol features the assay performed in a setup that eliminates fly handling and therefore reduces stress for the animals, which would otherwise impact the subjects' performance.
11:15
Determining the Contribution of the Energy Systems During Exercise
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Cited by 59 •
2012
This protocol allows researchers focused on exercise and sports sciences to determine the relative contribution of three different energy systems to the total energy expenditure during a large variety of exercises.
08:04
Evaluating the Accuracy of Snap Judgments
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2023
Source: Diego Reinero & Jay Van Bavel—New York University Social psychologists have long been interested in the way people form impressions of others. Much of this work has focused on the errors people make in judging others, such as the exaggerated influence of central traits (such as "warm" and "cold"), the insufficient weight given to the context in which others' behavior takes place, and the tendency for people to make judgments that conform to their initial expectations about another.
09:12
The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
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Cited by 383 •
2013
This video shows the resident-intruder paradigm in rats. This test is a standardized method to measure offensive aggression, defensive behavior and violence in a semi-natural setting. The use of the paradigm for social stress experiments is explained as well.
FAQs
When one signal in a paired visual channel is activated, it suppresses its opposing signal. Once the original stimulation ends, the balance between the two signals can shift, making the counterpart more noticeable. This neural comparison helps explain why perception may briefly show a contrasting color and illustrates how inhibition shapes visual experience.
An initial emotional response may be followed by a contrasting afterreaction as the system regulates repeated or intense experiences. With repetition, the initial response can become less prominent while the opposing reaction strengthens. This pattern helps explain changing emotional reactions and shows how psychological responses can depend on both immediate activation and later adjustment.
The perceptual form concerns paired neural signals that organize sensory experience, such as contrasting color channels. The emotional form concerns a sequence in time, with an initial reaction followed by an opposing afterreaction. Both rely on contrast, but one primarily explains how signals interact during perception, whereas the other explains how responses change across an experience and its aftermath.
Opponent-system patterns allow researchers to examine how neural comparison influences what people perceive after stimulation changes. Color afterimages provide an important outcome because they reveal the continuing effect of opposing channels rather than only the original stimulus. Studying these effects connects observable perceptual experiences with neural inhibition and supports broader research on sensory processing.
Repeated experiences can strengthen the opposing afterreaction associated with an initial emotional response. As that counter-response becomes more pronounced, the original experience may produce a changing overall effect, helping explain tolerance. When the original stimulus is absent, the strengthened opposing reaction may contribute to withdrawal, linking emotional adaptation with research on addiction.
The framework connects neural inhibition with adaptive behavior across several areas of psychology. Researchers can apply it to perception through color afterimages, to affect through changing emotional reactions, and to learning or addiction through repetition, tolerance, and withdrawal. Its value lies in linking immediate responses with later changes in behavior and experience.