Opiates
Opiates - Related Videos
07:23
Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
0 Views •
Cited by 41 •
2014
We describe a protocol to examine the development of opioid-induced hyperalgesia and tolerance in mice. Based on the measurement of thermal and mechanical nociceptive responses of naïve and morphine-treated animals, it allows to quantify the increase in pain sensitivity (hyperalgesia) and decrease in analgesia (tolerance) associated with chronic opiate administration.
16:57
MALDI Imaging Mass Spectrometry of Neuropeptides in Parkinson's Disease
0 Views •
Cited by 57 •
2012
Dopamine replacement pharmacotherapy using L-DOPA is the most commonly used symptomatic treatment of Parkinson’s disease, but is accompanied by side effects including involuntary abnormal movements, termed dyskinesia 1. Here, a protocol for MALDI imaging mass spectrometry is presented that detects changes in rat brain neuropeptide levels related to dyskinesia.
FAQs
Binding at mu-opioid receptors reduces pain signaling in the brain and spinal cord, explaining the analgesic effect. At the same time, opiates activate reward pathways, which can make drug-related experiences reinforcing. This combination is important psychologically because relief from pain and rewarding changes in experience may jointly influence repeated-use behavior.
Repeated exposure changes how the organism responds to the drug, producing tolerance, in which the original effects become less pronounced. Dependence reflects adaptation to continued exposure, while withdrawal can occur when use is reduced or stopped. These related but distinct outcomes help researchers examine how repeated drug experience affects behavior and motivation.
Because their effects include changes in mood, motivation, and behavior, opiates provide a way to study how biological drug actions shape psychological experience. Their activation of reward pathways also connects drug exposure with reinforcement, learning, and decision-making. This makes them relevant to research on why certain behaviors become repeated despite associated risks.
Opiates link identifiable receptor activity with changes in pain, reward, mood, and behavior. That relationship allows biopsychological research to examine how brain mechanisms interact with learning, emotion, motivation, and decision-making. Findings from this model can contribute to understanding addiction-related behavior rather than treating substance use as only a pharmacological or only a psychological problem.
Research can focus on the behavioral consequences of reward activation, repeated use, tolerance, dependence, and withdrawal. These processes provide psychologically relevant information for understanding patterns of substance use and the risks associated with continued exposure. Such knowledge informs approaches to substance-use assessment and prevention while recognizing that opiates can also provide clinical pain relief.
Evaluation must account for the contrast between clinical benefit and behavioral risk. Opiates may relieve pain, yet their effects on mood, motivation, reward, and repeated use can contribute to addiction-related concerns. This balanced perspective supports research and treatment approaches that consider both therapeutic effects and the psychological processes involved in substance-use behavior.