Objective: The purpose of this mechanistic study is to use electrophysiologic measurements, nerve conduction studies (NCS)and quantitative sensory testing (QST), to assess the local,nerve-specific effect of 3 acupuncture modalities on two anatomically distinct nerves in the forearm (median and ulnar nerve) in subjects with carpal tunnel syndrome (CTS).We expect to see a greater response in the diseased nerve (median), compared to the healthy one (ulnar).