Exactly what causes ADHD has not been pinpointed, though many professionals believe neurobiological and genetic elements play a role. In addition, numerous social factors such as family conflict and poor child-rearing practices, while not causing the condition, may complicate the course of ADHD and its treatment.

Attention deficit disorder, known in Europe and some parts of the world as hyperkinetic disorder, has been around a lot longer than most people realize. In fact, a condition that appears to be similar to the modern one was described by Hippocrates, who lived from 460 to 370 BC. The name attention deficit disorder was first introduced in 1980 in the third edition of the Diagnostic and Statistical Manual of Mental Disorders. In 1994 the definition was altered to include three groups withinA Liverpool fan has launched an online petition to have Barcelona superstar Lionel Messi banned for next week's Champions League semi-final second leg – claiming match officials did not punish him for...

Lionel Messi scored to help Barcelona clinch the Spanish league title after beating Levante 1-0 at Camp Nou on Saturday, cementing their&nbsp;status as the dominant club in Spain for more than a decad...