Heroin produces euphoria or pleasurable feelings and can be a positive reinforcer by interacting with the reward pathway in the brain. Indicate that you will explain how this happens.
Abusers also snort heroin to avoid problems with needles.
In this case, the heroin doesn't reach the brain as quickly as if it were injected or smoked, but its effects can last longer. Part of the cerebral cortex, the VTA, nucleus accumbens, thalamus, brainstem and spinal cord are highlighted. Binding of morphine to areas in the pain pathway leads to analgesia. Morphine binding within the reward pathway Reiterate that morphine binds to receptors on neurons in the VTA and in the nucleus accumbens. This is shown here within the reward pathway.