1. Fewer complications were noted for two-tendon repairs
2. zone 5 =flexor Mu. insertion to carpal tunnel
3. zone 4 is the carpal tunnel and its contents.
4. Zone 3 from the distal edge of the carpal ligament to the proximal edge of the A1 pulley.
   1. anatomy
      1. Lumbrical-origi. & Inset FDP--1&2 median, 3&4 ulnar n.
         1. Fun.
            1. When MCP
            2. flexed fully
            3. changes position proximally because the FDP tendon slides proximally
            4. extended
            5. extend PIP & DIP
            6. flex MCP
      2. palmer interossei
         1. when MCP
            1. fully extended
            2. Subtopic 2
            3. Subtopic 3
5. zone 2, or “no man's land.: start from proximal aspect of the A1 pulley to FDS insertion,The distal palmar crease superficially marks the termination of zone 3 and the beginning of zone 2.
   1. areas of zone 2- defined by the position of the distal tendon stump with the finger in the resting position
      1. A=under the A4
      2. B=under the C1
      3. C= under A2
         1. Tang recommends repair of one tendon repair of FDP with excision of the FDS , due to high rate of adhesions in this area if both the FDS and FDP were repaired
      4. D=under A1
      5. Subtopic 5
         1. anatomy
            1. Subtopic 1
            2. Subtopic 2
   2. Subtopic 2
      1. http://www.wheelessonline.com/ortho/zone_ii_flexor_injuries
6. Zone 1 is distal to the insertion of the FDS tendon. A laceration in zone 1, by definition, injures only the tendon of the FDP
   1. S/S
      1. no
      2. Subtopic 2
   2. Dx. X ray
      1. classification TYPES (Leddy and Packer) according to the site of the proximal Avulsed FDS stump,
         1. I - palm
         2. II - chiasm of the FDS in P2
         3. intra articular is (A) Extra Articular is (B)
            1. III - A4
            2. IV- palm
            3. V-A4 & P3 shaft #
7. most