What a qEEG can reveal about focus and attention.
Attention is not one thing in the brain. It's the coordinated work of several networks — the executive-control network, the salience network, and the default-mode network — switching on and off in concert.
Theta-beta ratio
One of the longest-studied EEG markers in attention research is the theta-to-beta ratio, particularly at frontal-central sites. Children and some adults with ADHD show elevated theta and reduced beta — a pattern interpreted as cortical "under-arousal" of the attention system [1, 2]. The marker is statistical, not diagnostic, and the picture is more nuanced than the early literature suggested.
Default-mode interference
Newer work has focused on how the default-mode network (active during mind-wandering) interferes with task-positive networks. People with attention difficulties often show incomplete suppression of default-mode activity during goal-directed tasks — which lines up with the felt experience of "being there but not there."
Sensorimotor and frontal coherence
Connectivity between the prefrontal cortex and the sensorimotor strip is involved in sustained attention and impulse control. Disrupted coherence patterns here often appear in qEEGs of people with ADHD, particularly the inattentive subtype.
What this means for a clinical plan
None of these markers diagnose ADHD on their own. But put together with a structured clinical interview, your developmental and academic history, and any psychometric assessment your psychologist or paediatrician has done, they help us build a personalised neurofeedback plan that targets the patterns showing up in your particular brain.