In brachial neuritis, pain, loss of function, and other damage occurs in the brachial plexus, the bundle of nerves that travels from the spinal cord to the chest, shoulder, arms, and hands. The cause of brachial neuritis is unknown.
Automatic gain control (AGC; also called automatic voltage gain) is a closed-loop feedback regulating circuit, the purpose of which is to provide a controlled signal amplitude at its output, despite variation of the amplitude in the input signal.
APPC Overview. 1  Advanced Program-to-Program Communication (APPC) is an implementation of the Systems Network Architecture (SNA) LU 6.2 protocol on a given system. APPC allows interconnected systems to communicate and share the processing of programs.