run; ii AND I.I-.G. 299 



1 he tuberosity of the scaphoid bone. 



The cuneiform articular surfaces of the scaphoid. 



The nii-dio-tarsal articulation. 



Tin- base of tin- first inetatarsal bone. 



'I'he l>ase of the fifth metat.irsal bone. 



\Vlutt AVM tendons do you expect to find on the outer surface of tlie ealcaneiim .' 



The tendons of the peroneus longus and brevis. They are separated by a little 

 spine of bone the peroneal intertendinous spine. Each tendon is in a separate 

 canal here, but higher up, behind the outer malleolus, they are in the same canal. 



/A>.v would yon describe the peroneus nniscle so as to girt- the bony parts of the 

 Itntli due prominence / 



The peroneus longus arises from the outer surface of the fibula in its upper 

 two-thirds ; its tendon passes behind the external malleolus of the fibula, with the 

 tendon of the peroneus brevis ; it passes on the outer surface of the calcaneum, 

 in the inferior peroneal groove ; it passes through a groove on the under surface 

 of the cuboid bone ; it is tendinously inserted into the base of the first meta- 

 tarsal bone, having traversed an osseo-aponeurotic canal, from the cuboid bone to 

 its insertion. 



Describe tlie peronens brevis. 



It arises from the outer surface of the fibula, middle one-third ; passes behind 

 the external malleolus of the fibula ; passes through the superior peroneal groove, 

 on the outer surface of the calcaneum ; and is inserted into the base of the fifth 

 inetatarsal bone. 



Xante the grooi-es through which tlie tendon of tlie flexor longns liallncis passes. 



This muscle arises from the posterior surface of the fibula, in its middle two- 

 thirds. It passes through a groove in the posterior part of the tibia (Fig. 208) ; 

 through a second groove, in the posterior surface of the astragalus, one inch 

 below the first groove ; through a third groove, on the under surface of the sus- 

 tentaculum tali of the os calcis or calcaneum ; through a fourth groove, between 

 the two sesamoid bones, in the tendons of the flexor brevis hallucis, at the meta- 

 tarso-phalangeal articulation of the great toe. 



.\iiine tlic muscles attacltcd to tlie inferior surface of the os calcis. 



The abductor hallucis, abductor minimi digiti, flexor brevis digitorum, and 

 musculus accessorius. 



Describe the insertion of the antagonistic muscles tibialis an tic us and tibialis 

 posticns. 



The tibialis anticus is inserted into the inner surface of the internal cuneiform 

 bone and adjacent part of the base of the first metatarsal bone. (Figs. 213-215.) 

 The tibialis posticns is inserted into the tuberosity of the scaphoid bone, into the 

 sustentaculum tali, into the bases of the second, third, and fourth metatarsal 

 bones, and into all the tarsal bones except the astragalus. 



How sliall we recognize and know these numerous small insertions of the tibialis 

 posticns muscle .' 



You can easily trace them as small, tendinous bands from the tuberosity of 

 the scaphoid bone to all other insertional points. (Fig. 215.) 



Describe the importance of tlie siistentaeitlnm tali. 



\ sup-rior surface articulates with the inner articular facet of the astragalus; 

 its inferior s.urface is grooved and lined by synovial membrane, for the transmis- 

 sion of the tendon of the flexor longus hallucis. 



(iirc the importance of the superior surface of the calcancnm. 



(i) It gives origin to the extensor brevis digitorum ; (2) it articulates with 

 tin- astragalus by two surfaces.. 



What is the importance of the posterior surface of the os calcis? 



Into this surface is inserted the tendo Achillis. 



