Posterior compartment of the forearm Posterior compartment of the forearm The posterior compartment of the forearm (or extensor compartment) contains twelve muscles which are chiefly responsible for extension of the wrist and digits, and supination of the forearm. It is separated from the anterior compartment by the interosseous membrane between the radius and ulna. There are generally twelve muscles in the posterior compartment of the forearm, which can be further divided into a superficial, intermediate, and deep layer. Most of the muscles in the superficial and the intermediate layers share a common origin which is the outer part of the elbow, the lateral epicondyle of
Blood is thicker than water Walter Scott's novel "Guy Mannering" (1815): "Weel — Blud's thicker than water — she's welcome to the cheeses." and in English reformer Thomas Hughes's "Tom Brown's School Days" (1857). The phrase was first attested in the United States in the "Journal of Athabasca Department" (1821)." On June 25, 1859, U.S. Navy Commodore Josiah Tattnall, in command of the U.S. Squadron in Far Eastern waters, made this adage a part of U.S. history when explaining why he had given aid to the British squadron in an attack on Taku Forts at the mouth of the Pei Ho River, thereby abandoning the