Nearly 70 percent of people with schizophrenia spectrum disorders (SSDs) smoke cigarettes—two to three times higher than the general population. A new research review examining brain imaging studies reveals why their brains may be uniquely vulnerable to nicotine and susceptible to continuing the habit.
Researchers analyzed 22 studies using various neuroimaging techniques including functional MRI, resting state fMRI, and structural MRI to observe the biological traits of those with SSDs. The findings reveal distinct neurological patterns in people with SSDs who smoke compared to the general smoking population, suggesting those with schizophrenia have a specific susceptibility to smoking and nicotine.
Brain Changes and Unique Neural Patterns
People with SSDs who smoke show significant reductions in gray matter, particularly in the prefrontal cortex and the amygdala. Gray matter is responsible for cognitive tasks, and reduction in volume can worsen both schizophrenia symptoms and cognitive skills. Since both smoking and SSDs are individually associated with gray matter reduction, the combined effect may compound the damage.
Research revealed unique neural patterns in patients with SSDs who smoke, including increased reward sensitivity and decreased pathways responsible for processing the negative effects of smoking. People with SSDs appear to find short-term rewards fulfilling while being less sensitive to long-term or cognitive awareness of smoking’s harmful effects. This suggests nicotine may be neurochemically attractive to those with the disorder in ways it isn’t for others.
Pathways to Better Treatment
For people with SSDs, smoking brings comfort and regulation in ways difficult to find in other substances—but it negatively affects the brain and increases the risk of lung cancer and other long-term health complications. Researchers point out that further investigation into smoking’s specific effects on SSDs could help develop targeted therapies that engage and satisfy these unique neural pathways, such as heightened reward sensitivity, while minimizing negative effects by replacing the substance with healthier alternatives.
This article is an AI-assisted summary. All facts and figures are drawn from the original report: https://us.headtopics.com/news/people-with-schizophrenia-disorders-may-be-drawn-to-smoking-79637951