The "Sleeping Brain" Phenomenon: Why People with ADHD Struggle to Maintain Focus
Recent research has revealed a startling brain pattern that may explain why individuals with Attention-Deficit/Hyperactivity Disorder (ADHD) often struggle to maintain focus. The research demonstrates that their brains can slip into brief episodes of sleep-like activity, even whilst they remain awake and engaged in concentration-demanding tasks.
The study, published in the journal JNeurosci, explores how brief bursts of brain activity resembling sleep phases affect a person’s ability to remain alert. Elaine Pinggal from Monash University and her team investigated whether this phenomenon represents a key factor behind attention difficulties, particularly in adults with ADHD.
To test their hypothesis, the researchers measured brain activity in 32 adults with ADHD who had ceased taking medication and compared it with 31 neurotypical adults (without ADHD). All participants were asked to complete tasks requiring sustained attention.
The results revealed that individuals with ADHD experienced episodes of sleep-like brain activity far more frequently. These moments correlated directly with frequent attention lapses, increased task errors, slower reaction times, and greater drowsiness.
Pinggal explained that these brief shifts in brain activity are actually normal, particularly when facing mentally taxing tasks. She offered an analogy to long-distance running.
“Sleep-like brain activity is a normal phenomenon occurring during demanding tasks. Imagine going for a long run and feeling tired after a while, which makes you stop briefly to rest. Everyone experiences brief moments of sleep-like brain activity,” Pinggal stated.
However, she emphasised a fundamental difference in ADHD.
“In people with ADHD, this activity occurs more frequently, and our research suggests that this increase in sleep-like activity may be a primary brain mechanism helping explain why these individuals find it more difficult to maintain sustained attention and consistent performance during tasks.”
These findings open the door to new treatment approaches. Previous research on neurotypical individuals demonstrated that auditory stimulation during sleep can enhance slow-wave activity, which in turn reduces sleep-like brain activity during daytime wakefulness.
The research team’s next step is to test whether the same auditory stimulation method can reduce similar brain activity during daytime hours for people with ADHD. If effective, this could represent a breakthrough for improving attention and work performance without relying entirely on conventional treatment methods.