An Experiment Proves Ghost Just an Illusion

"Our experiments induced the sensation of an alien presence in the laboratory for the first time. It shows that it can appear under normal conditions, only through conflicting sensory-motor signals," Blanke said. 

He explains that the robotic system mimics the sensations of some patients with mental disorders or healthy people under extreme circumstances. 

The study confirms that it is caused by the altered perception of their bodies in the brain.