DISSECTION OF THE UPPER EXTREMITY 77 



Veins. (See also Fig. 24.) 



(a) Basilic vein (V. basilica}. At what point does it pierce the fascia 



brachii ? 



(b} Cephalic vein (V. cephalica}. 

 (c} Median vein of elbow (V. mediana cubiti}, from V. cephalica 



obliquely upward to V. basilica. 

 Instead of (c) there may be a 

 (d) Median vein of forearm (V. mediana antibrachii}, bifurcating at 



head of elbow into 



(da} Basilic median vein (V. mediana basilica}, 

 (db) Cephalic median vein (V. mediana cephalica}. 

 In phlebotomy either the V. mediana cubiti or the V. mediana basilica 

 is selected. Note the relations, to these veins, of the lacertus fibrosus, 

 the arteria brachialis, and the ramus volaris of the N. cutaneus anti- 

 brachii median's. 



FIG. 22. 



Integumentum commune* 



Bundle of vessels and nerves _^^__ ,^ 



\'< IHL rcpfKitii'd 

 Vena basilica -^M /^3^^E^#m\l 



Fascia brachii (lamina 



N.umans^MOBaaKS^Bm """""" ; 



-M. brachialis 



_ -M. brachiodorsalis 



Humerus ' 



M. triceps brachii -^HH^^M^H^Septum intermusculare 



laterale 



Cross-section of the right arm near its lower end, to show the grouping of the muscles and their 

 relation to muscle-sheaths or fasciae. Half schematic. (After Toldt, Anat. Atlas, Wien, 1900, 2 Aufl., 

 p. 264, Fig. 503.) 



Lymphatics. 



(a) Superficial lymph-glands of elbow (lymphoglandulae cubitales 

 superficiales ) . 



They may be enlarged in infection of the hand or fingers. 



Deep Fascia of Arm (Fascia brachii) (O. T. Brachial Aponeurosis). 

 (Figs. 21 and 22.) 



Having isolated the vessels and nerves of the superficial 

 fascia, remove all the fat so as to clean the surface of the deep 

 fascia. Note 



(a) Its continuity with the deltoid and axillary fascia above and with the 



deep fascia of the forearm below. 



(b) That it is multiply perforated for the passage of vessels and nerves, 



and 



(c) The lacertus fibrosus. 



