Final answer:
Cocaine use leads to a decrease in prefrontal cortex activity. Repeated cocaine consumption causes adaptations in the brain that impair decision-making and impulse control.
Step-by-step explanation:
When cocaine addicts consume more cocaine, their prefrontal cortex (PFC) activity is likely to decrease. Cocaine, a powerful stimulant, acts on the brain by increasing dopamine levels in the neural synapse, leading to a sensation of euphoria. However, over time, repeated cocaine use can lead to adaptations in the brain, particularly in the PFC, one of the key areas associated with decision-making and impulse control. As indicated in studies, including the works by Muñoz-Cuevas et al., these adaptations can manifest as structural and functional changes, resulting in reduced PFC activity in cocaine-dependent individuals. This decrease in activity can contribute to impaired judgment and decision-making abilities that are often observed in addiction.