Walking Dead created a zombie fan base unlike any other. But the recent claims of a man diagnosed with a rare brain disorder give new light to the existence of zombies. Is it possible that someone is actually part zombie?

The British man indicated he was "brain dead" and that he is a zombie. The person went as far as saying he spent some time at the cemetery because he felt he belonged in there. Only identified as "Graham," the man was diagnosed with Cotard's Syndrome. This condition is also popular as the 'Walking Corpse Syndrome'.

Those who suffer from this type of condition are often linked to depression. Patients report feeling like parts of their body have stopped functioning - some go as far as saying the parts are either dead or missing. Graham spoke to New Scientist magazine and explained he attempted suicide but failed. He also thought he killed his own brain the process.

"It's really hard to explain," New Scientist quoted Graham.

"I just felt like my brain didn't exist anymore. I kept on telling the doctors that the tablets weren't going to do me any good because I didn't have a brain," he explained.

New Scientist describes the disorder as a condition caused by misfiring in the brain. When several parts are misfired, people have difficulty recognising people and attaching any association or emotion to those faces. This leads to feelings of detachment and isolation even to their own reflection.

The Walking Corpse Syndrome is not just rare - it is also dangerous. Many patients believe they are not alive and that they have little need for their bodies. This causes sufferers to avoid normal and basic human activities like eating, drinking and bathing. Some patients go as far as getting rid of their own bodies.

Despite the love and care from his family and friends, Graham admitted not feeling anything or feeling pleased about it.

"I lost my sense of smell and my sense of taste. There was no point in eating because I was dead. It was a waste of time speaking as I never had anything to say," he said.

Brain scans of Graham revealed brain metabolic activities are extremely low - this is almost the same as someone in a coma.