THE MUSCLES 



87 



Function: In addition to depressing the foot it has a sHght flexor 

 action on the fore-arm, especially when the limb is well extended. 



M. flexor antihrachit ulnaris (m.f.a.c.u.). Eisler (1895); Ribbing 

 (1907). 



Epitrochlo-cubital ...... Duges (1834) 



Flexor carpi ...... Stannius (1854-6) 



Ulnaris ........ Mivart (1869) 



Humero-ulnaris volaris .... Hoffmann (1873-8) 



Abaisseur du cubitus (38) ..... Perrin (1899) 



Together with preceding muscle = 



Flexor carpi ulnaris . Carus(i828); Rymer Jones (1852); Humphry 

 (1872); Osawa (1902). 



The second portion of the ulnar flexor muscle lies deep to the former. 

 It is much smaller and forms a triangular block of muscle extending 

 from its origin on the epkondylus medialis humeri to the proximal half 

 of the ulna. It has a fleshy insertion on the outer edge of this bone. 



Innervation-. Like the former slip it is innervated by the N. ulnaris. 



Function : The contraction of the muscle draws the fore-arm back- 

 wards — relative to the body — so that if the foot is resting on the 

 ground it assists in advancing the body (cf. Perrin). 



The following three muscles are accessory to the M. flexor prim- 

 ordialis communis. They are inserted on the dorsal side of its 

 palmar tendon. 



M.. flexor accessorius lateralis (m.f.a.l.). Ribbing (1907). 



Palmaris profundus III . . Eisler (1895); McMurrich (1903). 



Caput ulnare m. flex. dig. long, sublimis . . . Osawa (1902). 



(For other homologies see M. flex. prim, comm.) 



The M. flexor accessorius is a small muscle arising from the distal 

 end of the ulna, from the ulnare+intermedium, and from basale 4. 

 It passes obliquely radialwards and is inserted, as already stated, on 

 the dorsal side of the palmar tendon of the M. flex, prim. comm. 



Innervation: By N. ulnaris. 



Function'. It acts as an accessory flexor of the hand. 



M. flexor accessorius medialis (m.f.a.m.). Ribbing (1907). 



Palmaris profundus II . . Eisler (1895); McMurrich (1903). 



Caput ulno-carpale dig. long, sublimis . . . Osawa (1902). 



With M. pronator profundus = 



Pronator manus ...... Humphry (1872). 



(For other homologies see M. flex. prim, comm.) 



