DISSECTION OF THE ANTERIOR LIMB. 



53 



It possesses an interosseous ligament, and two pairs of lateral ligaments. 



The Interosseous Ligament is composed of shoi-t fibres passing fi-om 

 the inferior border of the navicular bone to the os pedis behind its artic- 

 ular surface. 



The Antero-Lateral Ligaments. Each of these passes from the side 

 of the OS coronse to be inserted into the excavation at the side of the 

 pyramidal process of the os pedis. 



The Postero-Lateral Ligaments. These seem to be the downward con- 

 tinuations of the latei-al ligaments of the pastern-joint. Passing from the 

 side of the os coronse, each is inserted into the upper border of the nav- 

 icular bone, and sends slips to the wing of the os pedis and inner surface 

 of the lateral cartilage. 



Synovial Membrane. This is supported in front by the extensor 

 tendon, and laterally by the lateral ligaments. A protrusion of it passes on 

 each side between the antero-lateral and postero-lateral ligaments, and 

 lies in relation to the deep face of the lateral cartilage. A third protru- 

 sion passes upwards posteriorly, between the navicular bone and the back 

 of the OS coronse (Plate 10, fig. 2). 



TABULAR VIEW OF THE MUSCLES OF THE FORE LIMB IN THEIR 

 ACTION ON THE DIFFERENT JOINTS. 



/Deltoid. 



I Coraco-humeralis. 

 F Latissimus dorsi. 

 Flexors < Teres major. 

 I Teres minor. 



I Scapulo-humeralis gracilis (?) 

 \Large head of triceps. 



T, , ( Suprasijinatus. 



Extensors ■[ Mastoido-humeralis. 



I Deltoid. 

 Abductors s Teres minor. 

 ( Infraspinatus. 



( Superficial pectoral. 

 Adductors -N Subscapularis. 



i Coraco-humeralis. 



Rotators 

 outwards 



Rotators 

 inwards 



• Deltoid 

 Teres minor 

 , Infraspinatus 



]\Iastoido-humeralis. 

 Latissimus dorsi. 

 Teres major. 



Flexors 



Flexors 



Flexors 



( Flexor brachi. 



1 Brachialis anticus. 



Elbow. 



I ( Triceps extensor cubiti. 



Extensors < Anconeus. 



I ( Scapulo-ulnaris. 



Carpus. 



/Flexor metacarpi extermis. 

 I Flexor metacarpi medius. 

 - Flexor metacarpi internus. 

 I Flexor perforans. 

 ^ Flexor perforatus. 



j Flexor perforans. 

 ^ Flexor perforatus. 



( Flexor perforans. 

 \ Flexor perforatus, 



Extensors 



Fetlock. 



Extensors 

 Pastern. 



Extensor - 



/' Extensor metacarpi magniis. 

 J Extensor metacarpi obliquus. 

 I Extensor pedis. 

 V Extensor suffraginis. 



( Extensor pedis. 



( Extensor suffraginis. 



Extensor pedis. 



COFFIX-JOINT. 



Flexor — Flexor perforans. | Extensor— Extensor pedis. 



