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.
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