Peer-reviewed article
NIRS Hemodynamic Response to Methylphenidate in Children with Attention Aeficit Hyperactivity Disorder: First Administration, Titration Phase and Associations with Clinical Severity
Crippa A, Grazioli S, Rosi E, Mauri M, Villa F et al. ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This peer-reviewed study examines how methylphenidate (a medication for ADHD) affects brain activity in children with attention deficit hyperactivity disorder using near-infrared spectroscopy technology. Twenty children with ADHD and 25 healthy controls were measured at three time points: before medication, after first dose, and during dose adjustment. The research looked for connections between changes in brain blood flow and improvements in ADHD symptoms. The authors suggest that early brain activity changes might predict response to medication treatment.
Key points
- Study measured brain hemodynamics in 20 children with ADHD at baseline, first MPH administration, and titration phase
- 25 healthy controls were recruited at baseline for comparison
- Children performed an emotional continuous performance task during brain imaging at each phase
- Researchers investigated whether brain hemodynamic changes could predict clinical symptom improvement
- Results suggest right prefrontal region changes after first MPH dose may predict changes during titration phase
Limitations
The document does not specify the country where this research was conducted, making geographic context unclear. The abstract does not provide detailed quantitative results, effect sizes, or statistical significance of findings.
Abstract
Introduction Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by lack of self-regulation and deficits in organizing behaviors in response to emotional stimuli. Methylphenidate (MPH) is one of the most effective psychostimulant drugs for ADHD, however, a possible predictive utility of brain hemodynamic data related to MPH administration and its relation to clinical symptomatology is still not clear. To address these questions, we used Near Infrared Spectroscopy (NIRS) technology, a non-invasive optical technique that allows to investigate the effect of psychopharmacological treatment on cortical hemodynamics. Methods Twenty children with ADHD underwent a three-waves study and 25 healthy controls were recruited at W1. At W2 children with ADHD received first MPH administration and at W3 they reached the titration phase. At each phase children performed - during NIRS recording - an emotional continuous performance task with visual stimuli of different emotional content. Clinical data were also collected at W1 and W3. We investigated the relationship among the difference between NIRS activation at W2 and W1 (Delta1) and W3 and W2 (Delta2), for each subject, task condition and brain region. Lastly, we investigated correlations between the Delta1 and clinical symptomatology indexes at W1 and between Delta2 and clinical data at W3. Conclusions Our study results suggest that hemodynamic changes in right prefrontal region probably induced by first MPH administration could predict hemodynamic changes related to MPH titration phase. These biological indexes could be associated to clinical evidences related not only to core ADHD symptoms but also to affective correlates. Disclosure No significant relationships.