| Flexor Tendon Injury Zones | |
| I | Distal to superficialis Insertion |
| II | Fibroosseous tunnel: A1 pulley to Zone I |
| III | Carpal Tunnel to A1 pulley |
| IV | Carpal Tunnel |
| V | Proximal to carpal tunnel |
Many factors influence recovery following flexor tendon injury, and location of injury in particular. Flexor tendon injuries are traditionally described as being by in one of five zones, as follows:
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