PHALANGES. 257 



The Second is the longest and largest of the remaining metatarsal bones, 

 being prolonged backwards into the recess formed between the three cuneiform 

 bones. Its tarsal extremity is broad above, narrow and rough below. It 

 presents four articular surfaces : one behind, of a triangular form, for articula- 

 tion with the middle cuneiform ; one at the upper part of its internal lateral 

 surface, for articulation with the internal cuneiform ; and two on its external 

 lateral surface, a superior and an inferior, separated by a rough depression. 

 Each of the latter articular surfaces is divided by a vertical ridge into two 

 parts ; the anterior segment of each facet articulates with the third metatarsal ; 

 the two posterior (sometimes continuous) with the external cuneiform. 



The Third articulates behind, by means of a triangular smooth surface, with 

 the external cuneiform; on its inner side, by two facets, with the second 

 metatarsal ; and on its outer side, by a single facet, with the fourth metatarsal. 

 The latter facet is of circular form, and situated at the upper angle of the base. 



The Fourth is smaller in size than the preceding ; its tarsal extremity presents 

 a terminal quadrilateral surface, for articulation with the cuboid ; a smooth 

 facet on the inner side, divided by a ridge into an anterior portion for articula- 

 tion with the third metatarsal, and a posterior portion for articulation with the 

 external cuneiform ; on the outer side a single facet, for articulation with the 

 fifth metatarsal. 



The Fifth is recognized by the tubercular eminence on the outer side of its 

 base. It articulates behind, by a triangular surface cut obliquely from without 

 inwards, with the cuboid ; and internally, with the fourth metatarsal. 



Articulations. Each bone articulates with the tarsal bones by one extremity, 

 and by the other with the first row of phalanges. The number of tarsal bones 

 with which each metatarsal articulates, is one for the first, three for the second, 

 one for the third, two for the fourth, and one for the fifth. 



Attachment of Muscles. To the first metatarsal bone, three: part of the 

 Tibialis Anticus, the Peroneus Longus, and First Dorsal Interosseous. To the 

 second, three : the Adductor Pollicis, and First and Second Dorsal Interosseous. 

 To the third, four : the Adductor Pollicis, Second and Third Dorsal, and First 

 Plantar Interosseous. To the fourth, four : the Adductor Pollicis, Third and 

 Fourth Dorsal, and Second Plantar Interosseous. To the fifth, five: the 

 Peroneus Brevis, Peroneus Tertius, Flexor Brevis Minimi Digiti, Fourth 

 Dorsal, and Third Plantar Interosseous. 



PHALANGES. 



The Phalanges of the foot, both in number and general arrangement, resem- 

 ble those in the hand ; there being two in the great toe, and three in each of 

 the other toes. 



The phalanges of the first row resemble closely those of the hand. The shaft 

 is compressed from side to side, convex above, concave below. The posterior 

 extremity is concave ; and the anterior extremity presents a trochlear surface, for 

 articulation with the second phalanges. 



The phalanges of the second row are remarkably small and short, but rather 

 broader than those of the first row. 



The ungual phalanges, in form, resemble those of the fingers ; but they are 

 smaller, flattened from above downwards, presenting a broad base for articula- 

 tion with the second row, and an expanded extremity for the support of the 

 nail and end of the toe. 



Articulations. The first row, with the metatarsal bones, and second phalanges; 

 the second of the great toe, with the first phalanx, and of the other toes, with 

 the first and third phalanges ; the third with the second row. 



Attachment of Muscles. To the first phalanges, great toe : innermost tendon 

 of Extensor Brevis Digitorum, Abductor Pollicis, Adductor Pollicis, Flexor 

 Brevis Pollicis, Transversus Pedis. Second toe: First and Second Dorsal 

 It 



