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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Body image (neuroscience) | 2/2 | https://en.wikipedia.org/wiki/Body_image_(neuroscience) | reference | science, encyclopedia | 2026-05-05T07:26:40.513246+00:00 | kb-cron |
=== Body integrity disorder === Body integrity dysphoria is a mental disorder in which a person gets the feeling that a certain part of their body no longer belongs on their body. People with this disorder know that the part is useful and healthy, but don't believe that they should be able to use it. It often causes people to try and get amputations or attempt to amputate themselves. There's no known cause of body integrity disorder, but it is thought to have to do with issues regarding the structure of the brain because multiple parts of the brain are involved in body perception.
=== Measurements === Attempts by researchers to measure variances in body image include the FAI index, developed in a 2014 study (Zaccagni 2014). The FAI (feel-status minus actual-status inconsistency) index is used to assess someone's weight perception. FAI scores range from -3 to +3: Negative FAI values mean weight status underestimation, positive FAI values mean weight status overestimation and a FAI score of 0 means a realistic perception of one's weight status. The study found that women tend to have positive FAI values (overestimating their weight) while men had negative FAI values (underestimating their weight). Further studies have used the FAI index to study body image among natives and immigrants in Italy and North Africa. Another study (Zaccagni 2020) developed a refined version of the FAI index, called the FAIFAT index. This index (feel-fat-status minus actual-fat-status inconsistency) was meant to address possible fat status perception inconsistencies by bioelectrical impedance analysis (BIA).
== See also == Body schema Gender dysphoria Mirror box Rubber hand illusion Body image—social concept
== References == 13. Vartanian, L. R., Pinkus, R. T., & Fardouly, J. (2025). Self-concept clarity and appearance comparisons in everyday life. Body Image An International Journal of Research, 52