The word<unk> esia" appears to have first been used in the modern medical sense of the word by Oliver Wendell Holmes Sr. in 1846, and it gained currency when adopted by James Young Simpson the following year.<unk> " was proposed in 1889 by Henry William Blanc, and was re-coined by Mathias Joseph Seifert in 1902. The name derives from the Ancient Greek roots an-, "not", aísthēsis, “sensation”, and -logia, "study". International standards for the safe practice of<unk> esia, jointly endorsed by the World Health Organization and the World Federation of Societies of<unk> esiologists, define<unk> esiologist" as a graduate of a medical school who has completed a nationally recognized specialist<unk> esia training program. However, various names are used for the specialty and those doctors who practice it in different parts of the world: *In North America, the specialty is referred to as<unk>  and a physician of that specialty is called an<unk> st. In these countries, the word<unk> etist" is used to refer to advanced non-physician providers of<unk> esia services such as nurse<unk> etists and<unk> st assistants. *In some countries that are current or former members of the Commonwealth of Nations–namely, United Kingdom, Australia, New Zealand and South Africa–the medical specialty is instead referred to as<unk> esia or<unk> etics, with an extra "a". As such, in these countries the same term may refer to the overall medical specialty, the medications and techniques that are used, and the resulting state of loss of sensation. The term<unk> etist is used only to refer to a physician practicing in the field; non-physicians involved in<unk> esia provision use other titles in these countries, such as "physician assistant". Some countries which formerly used<unk> esia" and<unk> etist", such as Ireland and Hong Kong, have transitioned to<unk> esiology" and<unk> esiologist". *In most other parts of the world, the spelling<unk>  is most commonly used when writing in English, and a physician practising it is termed an<unk> esiologist. This is the spelling adopted by the World Federation of Societies of<unk> esiologists and most of its member societies, as well as the European Society of<unk> , and it is the most commonly used term found in the titles of medical journals.
Anesthesiology
Medicine
Neuroesthetics
Obstetrics
Traumatology
Cardiology
Forensic medicine
Dentistry