Throwing tantrums in middle age? Your brain is still learning to be adult, say researchers. A new study by University College London has claimed that the human brain does not stop developing until people are in their 30s or 40s — meaning that many still have something of the teenager about them long after they have become adults. The finding could perhaps help explain why seemingly respectable adults sometimes just can't resist throwing a tantrum or sulking until they get their own way. Lead researcher Professor Sarah-Jayne Blakemore said, until about 10 years ago, it was pretty much assumed that the human brain stops developing in early childhood. But that is far from the truth, in fact most regions of the human brain continue to develop for many decades.He said, the region that goes through the most protracted development is the one which is involved in decision-making, planning and inhibiting inappropriate social behaviour and also things like social awareness and understanding other people and empathy.”This region starts to develop very early on after conception and continues to develop right through childhood and undergoes a reorganisation at the onset of puberty. It continues to develop well into a person's 30s and even 40s.