l8 UPPER EXTREMITY. 



4th anterior surface and external border radius. [Anterior 

 interosseous.] 



(lo) RADIAL REGION 3. 



Supina'tor lon'gUS : upper % external condyloid ridge hume- 

 rus, septum styloid process radius. [Musculo-spiral.] 



Exten'sor car'f i sadiallS l:n'gior: lower third external condy- 

 loid ridge humerus, septum base metacarpus indicis. [Mus- 

 culo-spiral.] 



Ezten'sor car'pi radialis brs'vior : common tendon external 

 COndyle humerus, external lateral ligament, septa base 

 metacarpus middle finger. [Posterior interosseous.] 



(ll) POSTERIOR BRACHIAL REGION, SUPERFICIAL LAYER, 4. 



Exten'SOr COmmu'n'S dig.to'rum: common tendon external coa- 

 dyle humerus, septa zd and 3d phalanges. [Posterior interos- 

 seous.] 



Elt2n'S:r minimi dlg'iti: external condyle humerus, septa- 

 unites with tendon extensor communis digitorum to be insert- 

 ed into zd and 3d phalanges of little finger. [Posterior inter- 

 osseous. 



Exten'SOr Car'pi Ulna'ris : common tendon external condyle 

 humerus, middle 3d posterior border ulna, fascia base 5th 

 metacarpus. [Posterior interosseous.] 



AiCOae'US! back part outer condyle humerus side, olecra- 

 non and upper posterior 3d ulna. [Musculo-spiral.] 



(l2) POSTERIOR BRACHIAL REGION, DEEP LAYER, 5. 



5:pina'tor tre'vis I external condyle humerus, external lat- 

 eral and orbicular ligaments, oblique line ulna (surrounds 

 radius at its upper part) back part inner surface; outer edge 

 bicipital tuberosity ; oblique line of radius. [Posterior inter- 

 osseous.] 



Exten'sor os'sis metacar'pi pol'licis: posterior surface shaft 



ulna and radius (middle 3d), interosseous membrane base 

 XSt metacarpus. [Posterior interosseous.] 



E-tea'sor pri'mi intorno'dii p:l'lici3! posterior surface radius, 

 interosseous membrane base ist phalanx of thumb. [Poste- 

 rior interosseous.] 



E*:ea'sor secun'di hteno'dii pcllicis : posterior surface ulna, 



interosseous membrane base ad phalanx thumb. [Posterior 

 interosseous.] 



Ex ez/sor in'iici:: posterior surface ulna, interosseous mem. 

 brane joins tendon extensor communis digitorum to ad and 

 3d pLalanges indiois. [Posterior interosseous.] 



(13) THUMB, RADIAL REGION, 4, 



AbiUC'tor pol'lic'S : ridge trapezium and annular ligament- 

 radial side base ist phalanx thumb. [Median.] 



