ANATOMY OF THE PHALANGES. 
593 
The pastern is an incomplete ginglymoid joint lying about an inch above 
the upper margin of the hoof. On account of its flat articulatory surface, it 
allows of limited side movements, especially when in a position of volar 
flexion. Its tense capsular ligament is attached anteriorly to the extensor 
tendon, laterally to the lateral ligaments ; behind it is expanded, and lies in 
contact with the branches of tire inferior sesamoidean ligaments. At the 
Fig. 220.—Perpendicular mesial section of right fore foot (the position of the lowei bones is 
shown rather too upright). A, Lower end of great metacarpus; B, suffragims 01 pas em 
bone ; C, inner sesamoid bone (to render the bone visible, a portion of the intersesamoidean 
ligament has been removed) ; D. coronet bone ; E , pedal bone; F, navicular bone ; ci, extensoi 
pedis tendon ; b, superior sesamoidean or suspensory ligament; b , imerior sesamoidean iga- 
ment ; c, flexor pedis perforatus tendon ; c', great sesamoid sheath ; d, flexor pedis penmans 
tendon ; e, capsular ligament of the fetlock-joint ; /, capsular ligament ot pastern-joint; 
g and g', capsular ligament of coffin-joint; h } bursa of flexor pedis perforans ; ^, plantar 
cushion ; i' portion of plantar cushion forming the bulbs of the heel ; h, coionaiy anc , 
l, sensitive wall ; m, sensitive sole ; n, sensitive frog ; o, horny wall; p, horny sole ; q, homy 
frog ; r, ergot at’ base of fetlock ; s, skin. 
sides are two short, stout lateral ligaments, whilst behind, the joint is sup¬ 
ported by the inferior sesamoidal ligaments in the same way as the fetlock is 
by the suspensory ligament; the inferior sesamoidal ligaments run from the 
posterior or lateral borders of the pastern-joint to the under portion of the 
sesamoid bones. The posterior articulatory surface of the os coronse is 
enlarged by the glenoidal fibro-cartilage attached at this point. 
The pedal-joint lies within the hoof near the lower border of the coionaiy 
V.S. Q Q 
