THE METATARSUS 



171 



Blood-supply. — The nutrient artery enters on the inner (tiljial) side of the 

 shaft near its middle: it is directed towards the base. 



The FOURTH METATARSAL has a somewhat quadrilateral terminal facet for 

 the cuboid bone. On its inner (tibial) side it has a large facet for the third 

 metatarsal: the posterior part of this is occa.'^ionally marked off for the external 



Fig. 185.— The Third (Left) Metatarsal. 



FACETS FOR SECOND METATARSAL 



TIBIAL 



OR 



INNER SIDE 



FACETS FOR SECOND METATARSAL^ ~l[ 



FIBULAR 



OR 



OUTER SIDE 



FACET FOR FOURTH METATARSAL 



Fig. 186. — The Fourth (Left) Metatarsal. 



FACET FOR THIRD METATARSAL 



TIBIAL .^ 



OR > 



INNER SIDE 



FACET FOR THIRD METATARSAL 

 FACET FOR EXTERNAL CUNEIFORM 



FIBULAR 



OR 



OUTER SIDE 



FACET FOR FIFTH METATARSAL 



cuneiform, l)ut this is far from constant. A\'henthis cuneiform facet is present, the 

 facet extends to the base of the bone. When absent, the surface is rough for 

 ligaments. The outer (fibular) side has a single facet for the fifth metatarsal. 



Muscles. — Adductor hallucis; second plantar interosseous; third and fourth 

 dorsal interosseous. 



