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
Forearm (comics) is wounded by the self-described 'biosentry', Hardaway who is employed by Gyrich. The other team members kill the man. The fact that Hardaway had been altered so much in order to battle mutants only serves to further enrage Forearm. Their mission is foiled by X-Force. During the battle Locus and Sunspot become lost, but Feral defects to the MLF after having a heated discussion with Gyrich. The team leaves and is taught teamwork by Moonstar, as, at the time, their ranks are once again down to four—Moonstar, Wildside, Forearm, and Feral. During this time Forearm and Moonstar begin to form