7G 



LABORATORY MANUAL OF HUMAN ANATOMY 



(b) Medial nerve of forearm (N. cutaneus antibrachii medialis) (0. T. 



internal cutaneous). (See Fig. 24, p. 81.) 



(ba) Anterior cutaneous rami to upper arm (rami cutanei 



brachii anterior es). 



(bb) Ulnar ramus (ramus ulnaris) (0. T. posterior branch). 

 (be) Volar ramus (ramus volaris) (0. T. anterior branch). 



(c) Medial nerve of upper arm (N. cutaneus brachii medialis) (0. T. 



lesser internal cutaneous, or nerve of Wrisberg). 



FIG. 21. 



Integumentum commune 



Fascia superficialis 



Fascia brachii 

 (lamina superficialis) r 



Point where the N. cutaneus 

 antibrachii medialis comes 

 through the fascia brachii 

 Perimysium externum 

 of the M. biceps brachii 



Fascia brachii 

 (lamina profunda) 



N. cutaneus 

 antibrachii later 



Bundle of vessels and nerv 

 Vena 



Septum 

 intermusculare mediate 



N. utnarii 

 Fascia, brachii 

 (lamina superficialis) 



Vena cutanea 

 ( V. cephalica) 



._ M. biceps brachii 



Line of uni9n of the 



lamina superficialis with the 



lamina profunda fasciae 

 brachii 



M. brachialis 

 N. radialis 

 M. brachioradialis 

 . Humerus 



Septum intermusculare 

 laterale 



M. triceps brachii 

 Fascia superficialis 



Integumentum commune 



The structures in the lower third of the arm cut across like stairs. 

 (After Toldt, Anat. Atlas, Wien, 1900, 2 Aufl., p. 264, Fig. 502.) 



(d) Radial nerve (N. radialis) (0. T. musculospiral). Only super- 



ficial branches of this nerve are seen as yet. 



(da) Posterior cutaneous nerve of upper arm (N. cutaneus 



brachii posterior) (0. T. upper external cutaneous 

 branch of musculospiral). 



(db) Posterior cutaneous nerve of forearm (N. cutaneus anti- 



brachii dorsalis) (0. T. lower external cutaneous branch 

 of musculospiral). 



(e) Musculocutaneous nerve (N. musculocutaneus) . 



(ea) Lateral cutaneous nerve of forearm (N. cutaneus anti- 

 brachii lateralis) (0. T. terminal cutaneous branch). 

 (See Fig. 24.) 



