454 MUSCLES. 



they expand over the back of the articulation there, and send 

 downwards triangular processes which are attached to the 

 base of the first phalanx, and to the tendinous terminations of 

 the interosseous muscles. On the back of the first joint the 

 tendon adheres closely to its synovial membrane, and is some- 

 what cartilaginous. At ,the second joint the tendon splits par- 

 tially into two, which pass somewhat laterally, and then re- 

 unite. The tendon then adheres again closely to the synovial 

 membrane of the third articulation, and finally terminates in 

 the base of the third phalanx. 



This muscle extends the toes, but flexes the foot. 



A long bursa is found enveloping the tendons where they 

 pass beneath the annular ligament of the ankle. 



It extends all the joints of the small toes, anxl flexes the foot. 



The Peroneus Tertius, 



Is rather a portion of the extensor longus, is found at its 

 lower outer part, and cannot be naturally separated from it. It 

 arises from the anterior angle of the fibula, between its middle 

 and lower end. 



It is inserted, by a flattened tendon, into the base of the me- 

 tatarsal bone of the little toe, and assists in bending the foot. 



The Extensor Proprius Pollicis Pedis, 



Is between the lower part of the tibialis anticus, and of the ex- 

 tensor longus. It arises from the fibula between its anterior 

 and internal angles, by a tendinous and fleshy origin, which 

 commences about four inches below the head of the fibula, and 

 continues almost to its inferior extremity. A few fibres also 

 come from the interosseous ligament, and from the lower part 

 of the tibia.. . 



The muscle being half penniform, the fibres run obliquely to 

 a tendon at its fore part, which passes through a particular gut- 

 ter of the annular ligament, and over the astragalus and sca- 

 phoides and upper internal parts of the foot, to be inserted into 

 the base of the first and second phalanx of the great toe. A 



