Yes. Cases of anorexia (though not defined as an actual disorder until the late 1880s) have gone back to the Greek and Roman Empires.
20 years old.
Anorexia was first diagnosed as an actual disease in the late 1880s by two English doctors. Written reoprts of anorexic-like disorders, however, go well into the early centuries, Middle Ages, and even as far back as the ancient Roman and Greek empires.
Anorexia really didn't "originate" anywhere, it was documented as a disease in the 1800's, but its affected people everywhere for centuries, there isn't really a way to map where it started, if it even did start in just one place.
Though never officially confirmed, it was rumored that Olsen may have suffered from anorexia in her late teens and early 20s.
Three centuries equals 300 years.
Anorexia can occur at any age, but it is most commonly seen between the ages of 12 and 25 years old.
Yes. The youngest officially diagnosed case of anorexia was an 8 year old girl from the UK. Anorexia can strike at any age, though it is most commonly seen in teens and young adults.
The scientific name for anorexia is Anorexia Nervosa.
I suppose you mean the literal meaning of anorexia? Today's culture defines anorexia as a disease in which someone deliberately starves themselves. The actual meaning of anorexia though is "without appetite." When attempting to form a diagnosis, a doctor might describe a patient as suffering from anorexia but that only means that they have no appetite. They aren't trying to deliberately starve to achieve a thinner body.
Anorexia has only been a diagnosed disorder since the late 1800s, but written descriptions of people who might have suffered from anorexia date back to ancient times. Priest reports state that Catherine of Sienna existed on a diet of next-to-nothing, consiting of only small amounts of fruits and berries. Ancient Romans practiced habits of starvation and purging after meals, signs of the eating disorders of anorexia and bulimia.
centuries
No she does not have anorexia.