Supposedly, a brain tumor the size of an egg located on a 40-year-old man's right lobe of the orbifrontal cortex caused uncontrollable paedophilia.  Neurologists had said that the paedophilia went away after the tumor was removed. 

"We're dealing with the neurology of morality here," says Swerdlow. Since the area does not affect physical health, "it's one of those areas where you could have a lot of damage and a doctor would never suspect something's wrong," he says.

"He wasn't faking," says Burns. "But if someone argues that every paedophile needs a MRI, the difference in this case was that the patient had a normal history before he acquired the problem. Most paedophiles develop problems early on in life."

News anchor Brad Williams is a man with an amazing memory. He can recall everything that happened in everyday of his life. All one has to do is call out a date. Doctors are trying to find out how he does it. I can barely remember what I did 5 minutes ago! I hope they find out before I forget about this! Read the story here: Remember when? Man with big memory does

Scientists at the Duke Univesity Medical Center are suggesting they have discovered the region of the brain that determines whether a person will be altruistic or selfish.

Altruism - the tendency to help others without obvious benefit to oneself - appears to be linked to an area called the posterior superior temporal sulcus.

Using brain scans, the US investigators found this region related to a person's real-life unselfish behaviour.

They are now exploring ways to study the development of this brain region in early life and believe such information may help determine how altruistic tendencies are established.

Researcher Dr Scott Huettel explained: "Although understanding the function of this brain region may not necessarily identify what drives people like Mother Theresa, it may give clues to the origins of important social behaviours like altruism."