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A total of nine flexor tendons (not the muscles themselves) pass through the carpal tunnel: 1  flexor digitorum profundus (four tendons) 2  flexor digitorum superficialis (four tendons)  flexor pollicis longus (one tendon)
Carpal Tunnel and Cubital Tunnel Syndrome. You have been diagnosed with carpal tunnel and cubital tunnel syndrome. The carpal tunnel is a narrow. space in the wrist that contains the median nerve. It is surrounded by the bones of the wrist (carpals) and a thick tendon sheath. Friction will cause the tendon sheath to swell and enlarge limiting the space.