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Rehabilitation of Intrinsic Muscle Pathology

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1.  Which of the following is TRUE about the volar interossei? No action to the 3rd digit No bony insertion Inserts to the ulnar lateral band All of the above

2.  What are the primary muscles that extend the PIP and DIP joints? Extensor digitorum communis Dorsal interossei Lumbricals Volar interossei

3.  A Boutonniere deformity is due to an injury of the central slip and is characterized by: Flexion at the proximal interphalangeal (PIP) joint and hyperextension at the distal interphalangeal (DIP) joint Hyperextension at the proximal interphalangeal (PIP) joint and flexion at the distal interphalangeal (DIP) joint Flexion at the distal joint only A stiff finger with no flexion at the PIP joint

4.  All of the following are TRUE about "Saddle Syndrome" or lumbrical/interossei adhesions EXCEPT: Can be caused by a trauma, contusion, or infection There is pain only with MP extension There is pain proximal to the MC head in the intermetacarpal space Pain with both intrinsic - and/or + positions

5.  What group of people report the biggest amount of lumbrical tears? Tennis players Carpenters Rock climbers Musicians