Brachial PlexusNerve BlockLumbosacral PlexusBrachial Plexus NeuropathiesBrachial Plexus NeuritisBirth InjuriesChoroid PlexusParalysis, ObstetricMusculocutaneous NerveNerve TransferCervical PlexusSpinal Nerve RootsParalysisMyenteric PlexusPeripheral NervesIntercostal NervesAnesthetics, LocalThoracic NervesShoulder JointThoracic Outlet SyndromeMepivacaineSciatic NerveMedian NerveClavicleUlnar NerveSubmucous PlexusButorphanolContracturePeripheral Nervous System NeoplasmsNerve RegenerationMeningoceleNerve Fibers