text: Yo, check it out, let me drop some knowledge,
  'Bout human muscle adaptin' with tendon transfer, no garbage.
  We studied the flexor carpi ulnaris, known as FCU,
  Measured its length-force traits, before and after, that's true.
  
  At the initial operation, everything was fine,
  But at the reoperation, things had changed in no time.
  FCU got 20 mm shorter, a noticeable shift,
  Active force took a hit, decreased by about 10%, swift.
  
  That drop in force indicates some atrophy, my friend,
  Muscle wastin' away, it's a trend that won't bend.
  Passive force, on the other hand, went the opposite way,
  Increased stiffness, man, that's what the numbers say.
  
  But hold up, the FCU fiber length remained the same,
  Despite the changes, it played no part in this game.
  This case we present shows how human muscles roll,
  Adapting to a new function, they got control, fo' sho'.