"Somatoparaphrenia" Natural Recordings by Native Speakers
Somatoparaphrenia is a rare neuropsychiatric syndrome characterized by a person's misattribution of parts of their own body or their own thoughts, actions, or actions of others, as alien or non-self. These delusions can be most manifest in the upper or lower parts of the body, which is perceived as not belonging to oneself: a patient may tell a doctor that one of their arms is a playing piano while it lies quietly in his lap.
The term comes from the Greek: "somato-" (somatos, σώματος), meaning "body", and "paraphrenia" (παραφρήνεια), meaning "beside frenzy" or "madness".