What are the main causes of cotard's syndrome?

Hypothesis. This syndrome is also called "walking dead" because those suffering from it deny they exist; or sometimes that parts of their body are real.Cause is believed to be malfunction in 2 parts of the brain: fusiform gyrus (recognizes faces) & amygdala (processes your emotions. When these 2 areas go haywire and a person cannot recognize what should be familiar faces, holding on to reality is tough.