Reduced Prefrontal Cortex Activation in Children with Attention-Deficit/Hyperactivity Disorder during Go/No-Go Task:...

Area of Science:

• Neuroscience
• Developmental Psychology
• Medical Imaging

Background:

• Attention-Deficit/Hyperactivity Disorder (ADHD) is a prevalent childhood neuropsychiatric condition affecting 3-5% of school-aged children.
• Understanding the neurobiological underpinnings of ADHD is crucial for effective diagnosis and intervention.
• Functional near-infrared spectroscopy (fNIRS) offers a non-invasive method to assess brain activity.

Purpose of the Study:

• To investigate whether fNIRS can detect differences in oxygenated hemoglobin (oxy-HB) concentrations between children with ADHD and typically developing (TD) children.
• To explore the utility of fNIRS in identifying brain activity alterations associated with ADHD during a cognitive task.

Main Methods:

• A cohort of 14 children diagnosed with ADHD and 15 TD children participated in the study.
• fNIRS was employed to record metabolic signals, specifically changes in oxy-HB, during a go/no-go task.
• Statistical analyses were performed to compare fNIRS data between the ADHD and TD groups.

Main Results:

• TD children exhibited a significant increase in oxy-HB in the left frontopolar cortex (FPC) during inhibitory tasks.
• Children with ADHD did not show this significant oxy-HB increase in the left FPC.
• ADHD subjects demonstrated reduced activation in the left FPC compared to TD children.

Conclusions:

• fNIRS-based functional brain imaging revealed diminished activation in the left prefrontal cortex (PFC) in children with ADHD during an inhibition task.
• fNIRS emerges as a potentially valuable tool for differentiating between children with ADHD and TD children.
• These findings highlight the role of PFC dysfunction in ADHD and the promise of fNIRS as a diagnostic aid.