Supernumerary body part considered to have lost much or all of their original function through evolution. These body parts can be classed as additional to the required functioning of the body. In human anatomy the vermiform appendix is sometimes classed as a vestigial remnant. Prosthesis is an artificial extension that replaces a body part, and cybernetics is the study of computer technology in relation to organisms which can include replacement or additional body parts. Body integrity identity disorder (BIID) is a psychiatric disorder in which a person thinks that they have one or more additional limbs than they should, despite having two arms
Body image (medicine) have positive FAI values (overestimating their weight) while men had negative FAI values (underestimating their weight) Body image (medicine) Body image is a medical term, often used in the context of describing a patient's cognitive perception of their own body. The medical concept began with the work of the Austrian neuropsychiatrist and psychoanalyst Paul Schilder, described in his book "The Image and Appearance of the Human Body" first published in 1935. In psychology, it typically refers to one's perceptions, beliefs, and emotional attitudes towards one's body. The concept is used to discuss various pathologies and disorder, such as anorexia nervosa