Page 67 - Adams and Stashak's Lameness in Horses, 7th Edition

Functional Anatomy of the Equine Musculoskeletal System 33

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Serratus ventralis m.

Supraglenoid
tubercle

Long head of
triceps brachii m.

Biceps brachii m.

Dorsomedially the lacertus
fibrosus joins the epimysium
of the extensor carpi radialis m.

Accessory (radial check) ligament of
superficial digital flexor m.

Metacarpal tuberosity
Accessory (carpal check)
ligament of deep digital flexor m.
Common digital extensor tendon

Suspensory ligament

Extensor branch of suspensory ligament
Distal sesamoidean ligaments

Figure 1.32. The passive stay apparatus of the left thoracic limb with assisting active elements.

and their accessory (check) ligaments assist the suspen­ its support of the fetlock, resulting in “sinking” or hyper­
sory apparatus of the fetlock in suspending the fetlock extension of the fetlock. 35
and preventing excessive overextension of the metacar­ The skeletal elements of the carpus exhibit some sta­
pophalangeal joint and collapse of the fetlock during bility in extension. Soft tissue stabilization is provided by
loading. Disruption of the suspensory apparatus alters the palmar carpal ligament and the collateral ligaments.
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