Which neural circuitry is implicated in ADHD, contributing to deficits in attention and inhibition?

Which neural circuitry is implicated in ADHD, contributing to deficits in attention and inhibition?

• A. Frontal-limbic circuitry
• B. Frontostriatal circuitry
• C. Occipital-temporal circuitry
• D. Sensorimotor circuitry

Answer: (B)

Attention and inhibition deficits in ADHD are best explained by disrupted frontostriatal circuitry. This network links the prefrontal cortex, including regions like the dorsolateral PFC and anterior cingulate, with the basal ganglia (caudate and putamen). Together, these areas support executive functions such as sustaining attention, monitoring performance, and inhibiting impulsive or inappropriate responses. In ADHD, reduced activation and weaker connectivity in these frontostriatal pathways lead to difficulties maintaining focus and controlling impulses, which aligns with observed symptoms. Dopaminergic and noradrenergic signaling in this circuit also helps explain why stimulant medications—which boost these neurotransmitters in the frontostriatal system—often improve attention and inhibitory control. Other circuits, like frontal-limbic, are more about emotion regulation, while occipital-temporal and sensorimotor circuits are tied to perception and movement, not the core executive control challenges of ADHD.

Attention and inhibition deficits in ADHD are best explained by disrupted frontostriatal circuitry. This network links the prefrontal cortex, including regions like the dorsolateral PFC and anterior cingulate, with the basal ganglia (caudate and putamen). Together, these areas support executive functions such as sustaining attention, monitoring performance, and inhibiting impulsive or inappropriate responses. In ADHD, reduced activation and weaker connectivity in these frontostriatal pathways lead to difficulties maintaining focus and controlling impulses, which aligns with observed symptoms. Dopaminergic and noradrenergic signaling in this circuit also helps explain why stimulant medications—which boost these neurotransmitters in the frontostriatal system—often improve attention and inhibitory control. Other circuits, like frontal-limbic, are more about emotion regulation, while occipital-temporal and sensorimotor circuits are tied to perception and movement, not the core executive control challenges of ADHD.