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Fascial Spaces

  1. Fascial Spaces of The Palm
    1. These are potential spaces filled with loose connective tissue and their boundaries limit the spread of infection in the palm.
    2. The triangular palmar aponeurosis fans out from the lower border of the flexor retinaculum. From its medial & lateral borders a fibrous septum passes backward and is attached to the anterior border of 5th and 3rd metacarpal bones respectively.
    3. These septum divides palm into three compartments
  2. Thenar Space
    1. It is lateral to lateral septum and must not be confused with the fascial compartment containing the
    2. thenar muscles.
    3. It lies posterior to the long flexor tendons to the index finger and in front of the adductor pollicis muscle
    4. and contains the first lumbricals muscles
  3. Mid Palmar-Space
    1. It lies between medial & lateral septum
    2. It contains 2nd, 3rd & 4th lumbrical muscles and lies posterior to the long flexor tendons to the middle, ring, and little fingers. It lies in front of the interossei and 3rd, 4th, and 5th metacarpal bones.
    3. Space medial to medial septum contain three hypothenar muscles. This space is clinically unimportant.
    4. Proximally thenar and mid-palmar spaces are closed off from the forearm by the walls of the carpal tunnel. Distally, the two spaces are continuous with appropriate lumbrical canals.
    5. Lumbrical canal is a potential space surrounding tendon on of each lumbrical muscle.

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