Addiction Mechanisms
Addiction Mechanisms - Related Videos
09:44
An Introduction to Reward and Addiction
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2023
Consequences play a major role in controlling our behavior. If the consequence is a reward, then it encourages the associated behavior. Rewards can come in many forms such as a pleasant feeling, money, or food. However, sometimes an individual engages in compulsive behavior despite of negative consequences, and this state is known as addiction. Administration of addictive substances is neurochemically rewarding, which ultimately causes a loss of control in limiting the intake. Scientists aim...
07:18
Deep Brain Stimulation as a Treatment for Drug Addiction in a Rat Model
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2025
Source: Batra, V., et al. A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration. J. Vis. Exp. (2016).This video demonstrates a rat model of drug addiction in which the animal self-administers intravenous methamphetamine by pressing a lever, leading to compulsive drug-seeking behavior driven by dopamine release in the nucleus accumbens. To counteract this, the rat undergoes deep brain stimulation (DBS) via an implanted bipolar...
01:15
Drug Abuse and Addiction: Pharmacological Phenomena
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2024
Drug dependence, abuse, and addiction are complex phenomena that can precipitate various abnormal states. Physical dependence refers to a state of pharmacological adaptation to a drug. This adaptation often results in tolerance—a reduced response to the drug after repeated administrations. When the drug use is abruptly stopped, withdrawal symptoms occur due to the body's need to readjust from the pharmacologically induced imbalance. However, tolerance and withdrawal symptoms do not necessarily...
12:45
Mechanical Stimulation of Chondrocyte-agarose Hydrogels
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Cited by 29 •
2012
The biosynthesis of cartilaginous extracellular matrix by chondrocytes can be affected by application of mechanical stimuli. This method describes the technique of applying dynamic compressive strains to chondrocytes encapsulated in 3D constructs and the evaluation of induced changes in chondrocyte metabolism.
03:06
Reaction Mechanisms
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2020
Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs. For instance, the decomposition of ozone appears to follow a mechanism with two steps:
FAQs
Repeated exposure can make reward-based learning increasingly cue-driven. Environmental or internal cues associated with use may acquire motivational significance, so encountering them can intensify craving even when the person recognizes harmful consequences. This mechanism helps explain why addiction-related behavior may persist across settings and why identifying triggers is important for prevention and treatment planning.
Neuroadaptations help connect persistent use with changes in motivation, stress responses, and perceived control. As these systems adjust to repeated exposure, withdrawal and stress may become more influential in decision-making, while ordinary goals can lose motivational priority. Considering these interacting processes gives psychologists a fuller account than attributing continued behavior to reward seeking alone.
Reinforcement can strengthen behavior when substance use or a compulsive behavior produces a rewarding or relieving outcome. Emotion regulation adds another pathway: the behavior may become a strategy for managing difficult feelings. Psychology therefore examines how learned rewards, emotional coping, decision-making, and context combine, rather than treating them as separate causes.
Assessment can examine patterns of reinforcement, cue-related craving, withdrawal, stress responses, perceived control, motivation, emotion regulation, decision-making, and environmental context. Mapping how these factors interact helps distinguish immediate triggers from maintaining processes. It also gives clinicians a basis for selecting prevention or treatment strategies that address specific risks rather than relying on a single explanation.
Treatment planning can target several mechanisms at once. Interventions may address triggers, strengthen motivation, develop coping skills, and examine decision-making or emotion-regulation patterns. This approach is useful because craving, stress, reduced perceived control, and environmental cues can reinforce continued behavior through different but interacting routes. It also helps tailor strategies for managing relapse risk.
Environmental context can shape both exposure to triggers and the options available for coping. Psychological analysis therefore considers where behavior occurs, which cues or stressors accompany it, and how context affects motivation and perceived control. This perspective supports prevention strategies that address risk conditions and treatment plans that prepare people for challenging situations.