FOREARM AND HAND 



163 



ligaments are often found intervening between the annular 

 ligaments and the stronger portions of the sheaths. The 



Digital synovial sheaths 



Synovial sheath of 

 flex. poll, long 



Ridge on os multangulum majn 



Transverse carpal ligament 



Pisiform 



Tuberosity of navicular bone 



' 1 1 



ft ff 



FIG. 71. The Synovial Sheaths of the Wrist and Hand. The positions oi 

 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. 



fibrous sheath, together with the phalanges and the volar 

 accessory ligaments of the metacarpo-phalangeal and inter- 

 i 11 a 



