According to a study published in the PLOS ONE, it has been revealed that children suffering from Attention Deficit Hyperactivity Disorder are unable to process emotional memories while they are asleep.

The study was carried out by a group of researchers from University Hospital Schleswig-Holstein. Study researchers were of the view that small children's sleep is combined with emotional memories. But a thing is not found in children with ADHD.

Absence of the same is said to cause emotional distress to children in the daytime, says researchers. In order to reach at the above given result, the study researchers enrolled three different groups.

First group comprised of 20 adults with ADHD, 16 children with ADHD and 16 children without ADHD. In total, 560 pictures having emotional distress were shown to them. Half were emotionally negative and rest 50% was neutral.

It shall be noted that pictures were shown during evening. Their brain activity was monitored at the time of their sleep. It was found that children without ADHD have maximum consolidation of emotional memories.

The portion was lacking in children with ADHD. "While several studies reported a benefit from sleep with respect to emotional memory in healthy individuals, our results showed for the first time that healthy children outperform healthy adults", said study researchers.