JAMA. 1968;203(11):976-977. doi:10.1001/jama.1968.03140110068016.
Text Size: A A A
Published online

"Calcitonin" or "thyrocalcitonin"? Both names are vying for acceptance. "Calcitonin" is the name given to the calcium-lowering hormone by Copp and his co-workers1 at the University of British Columbia when, in 1962, they postulated its existence on the basis of perfusion experiments on canine thyroid-parathyroid complexes. The Canadian investigators believed that this hormone was secreted by the parathyroid glands, but, avoiding commitment to an anatomic site, they chose a functional term. One year later Hirsch and his associates2 discovered a hypocalcemic, hypophosphatemic principle in thyroid tissue from which they were able to extract a potent biological preparation. For this they devised a simple bio-assay in which an injection of the test substance was given to rats, and the one-hour fall in plasma calcium levels was taken as the response. They named the substance "thyrocalcitonin," and, when it was subsequently demonstrated that thyrocalcitonin and calcitonin were in fact identical,


Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours




Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).


Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.