In the natural sciences, a primary source could be defined as a report of original findings or ideas. These sources often appear in the form of research articles with sections on methods and results..
crampon - a hinged pair of curved iron bars; used to raise heavy objects crampoon grapnel, grapple, grappling hook, grappling iron, grappler - a tool consisting of several hooks for grasping and holding; often thrown with a rope
Cramps are common: A muscle cramp is a involuntary contraction of a musle, especailly common of the legs and feet. Most commonly caused by hyperexcitability of the nerves that stimulate the muscles. Can also be the result of an injury and vigorous activity.