FOREARM AND HAND 135 



The mucous sheath which invests the tendons of the flexor 



Digital synovial sheaths 



Ridge on os multangulum majus --r---- 

 Transverse carpal ligament ... 



Tuberosity of navicular bone 



-. Pisiform 



FIG. 58. The Synovial Sheaths of the Wrist and Hand. The positions of 

 various incisions for the evacuation of pus are also shown. 



i and 2. Incisions into the common palmar sheath, placed between the median and 

 ulnar nerves. 



3. Incision uniting i and 2. 



4. Incision into the proximal part of the sheath of flexor pollicis longus. It is placed 

 between the radial artery and the median nerve. 



5. Incision into the distal part of the sheath of flexor pollicis longus. 



6. Incision into the thenar space. 



7. Incision over terminal phalanx. 



8. 9 and 10. Incisions into the digital sheaths. They lie opposite the shafts of the 

 phalanges. 



digitorum sublimis and flexor digitorum profundus is some- 

 times divided by a vertical partition into two compartments, 

 and the lateral of them communicates, by means of a small 

 i 96 



