Key insight: sleep disorder, in particular insufficient delta sleep, may cause symptoms similar to ADHD<p><pre><code> The patient didn’t have A.D.H.D., I realized, but a chronic sleep deficit.
A number of studies have shown that a huge proportion of children with an
A.D.H.D. diagnosis also have sleep-disordered breathing like apnea or
snoring, restless leg syndrome or non-restorative sleep, in which delta
sleep is frequently interrupted.
One study, published in 2004 in the journal Sleep, looked at 34 children
with A.D.H.D. Every one of them showed a deficit of delta sleep,
compared with only a handful of the 32 control subjects.</code></pre>