Somatoparaphrenia

Somatoparaphrenia is a general term for various neurological disorders which involve a delusion about one side of the body.

It can be a type of monothematic delusion where where, a person denies ownership of one of their a limbs or an entire side of one's body. As an example, a patient would believe that her or his own arm would belong to the doctor, or that another patient left it behind.

Causes
It is believed that this disorder is caused by parietal or biparietal strokes.