All articles tagged with #methylphenidate
A new study published in Psychological Medicine reveals that methylphenidate improves decision-making in adults with ADHD specifically by enhancing their sensitivity to negative consequences, rather than by increasing reward motivation or slowing down response times.
Researchers reanalyzed eye-tracking data from 50 Chilean children aged 10 to 12, finding that unmedicated children with ADHD exhibited approximately 23% greater trial-to-trial variability in pupil responses during a memory task compared to controls. While pupil size changes reflect attention and effort, the study cautions that these measurements are not yet diagnostic. Medication with methylphenidate reduced this variability, but researchers warn that pharmacological effects on pupil size cannot be fully separated from cognitive improvements.
A Finnish study of nearly 4,000 children with ADHD found that sustained methylphenidate treatment (Ritalin/Concerta) before age 13 for about 3–4 years did not increase—and may reduce—the risk of developing psychotic disorders later; the overall ADHD–psychosis link may reflect shared genetics rather than medication. Experts caution that findings may not apply to older adolescents and that amphetamine-based treatments could carry higher risk, highlighting the need for more research on dosing, timing, and long-term effects.
A study in Nature Mental Health reveals that structural differences in the brain may affect how well adults with ADHD respond to stimulant medications like methylphenidate. Using MRI scans, researchers found that non-responders had smaller cortical volumes and surface areas in several brain regions compared to responders. The findings suggest that neuroanatomy plays a crucial role in treatment effectiveness, although the study's small sample size and focus on males limit its generalizability. Further research is needed to confirm these results and explore potential sex differences.
New research suggests that the effects of methylphenidate, commonly known as Ritalin, on creativity depend on an individual's baseline dopamine levels. The study found that methylphenidate impaired creative thinking in individuals with low dopamine levels but enhanced it in those with high dopamine levels. The research highlights the complex relationship between brain chemistry and cognitive function, cautioning against the assumption that psychoactive drugs can universally enhance creativity. The study also suggests that the effects of dopamine on creativity may not be evident under normal conditions but become apparent when the system is manipulated with medication. However, further research is needed to understand the specific neural mechanisms involved.