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
(See also Introduction to Symptoms of Brain, Spinal Cord, and Nerve Disorders.) A cramp is a sudden, brief, unintended (involuntary), and usually painful contraction of a muscle or group of muscles. Muscle cramps can be a symptom of nervous system dysfunction.