MYOLOGY I 23 



Relations. Internally, with the flexor perforatus indicis secundus 

 pedis, and externally, with the flexor longus hallucis. 



Action. Flexes the toes as their long flexor. A second flexor of 

 the outer toe. 



Flexor Perforatus Medius Secundus Pedis (Fig. 17, No. 9). 

 Location. The posterior tibial region. 



Origin. From a strong fascia that merges with the knee-joint, 

 and by a tendon from the external condyle of the femur in common 

 with the tendon of the flexor perforatus indicis secundus pedis. 



Insertion. Continued as a flattened tendon extending from the 

 lower third of the leg, passing obliquely through the tibial cartilage 

 and then through the interno-posterior canal of the hypotarsus, 

 (Fig. 12, No. F, 5) inserted to the second joint of the middle toe. 



Shape. Long, fusiform. 



Relations. With the shaft of the fibula, which it covers. 



Action. Flexes the middle toe. 



Flexor Perforatus Medius Primus Pedis (Fig. 17, No. 2). Loca- 

 tion. Posterior tibial region. 



Origin. From the inner side of the muscular portion of the flexor 

 perforatus annularis primus pedis. 



Insertion. Terminating in a flattened tendon, passes through 

 the tibial cartilage and hypotarsus, and then extends along the 

 shaft of the basal joint of the third toe, and, dividing into two 

 slips, inserts to either side of its shaft. 



Shape. Long, rather small. 



Relations. With the flexor perforatus annularis primus pedis 

 on the inner side. 



Action. Flexes the third toe. 



Flexor Perforatus Indicis Primus Pedis (Fig. 17, No. 4). Loca- 

 tion. The posterior tibial region. 



Origin. From a thin, broad tendon, on the external condyle of 

 the femur, in common with the flexor perforatus medius secundus 

 pedis. 



Insertion. Becoming tendinous, passes through the tibial cartilage 

 and the hypotarsus of the metatarsus (Fig. 16, ^4) and inserts 

 to the sides of the basal joint of the second toe. 



Shape. Long, slender, fusiform; somewhat flattened laterally. 



Relations. With the flexor perforatus medius secundis pedis, 

 posteriorly. 



Action. A flexor of the toes. 



