The Equine Forelimb. The Stay Apparatus. Flashcards
What is the stay apparatus?
A tendinous support mechanism that helps the horse stand without much muscular exertion.
Is the stay apparatus only found in the forelimb?
No, it is also found in the hindlimb.
Does the forelimb or the hindlimb support most of the bodyweight?
The forelimb supports most of the bodyweight.
What are the 13 structures involved in the stay apparatus?
The serratus ventralis muscle.
The biceps brachii muscle.
The lacertus fibrosus muscle.
The lateral collateral ligament of the elbow.
The extensor carpi radialis muscle.
The common digital extensor tendon.
The extensor slips.
The suspensory ligament.
The deep digital flexor tendon.
The accessory ligament of the DDFT.
The superficial digital flexor tendon.
The accessory ligament of the SDFT.
The distal sesamoidean ligaments.
What 5 muscles are involved in the stay apparatus?
The serratus ventralis muscle.
The biceps brachii muscle.
The lacertus fibrosus muscle.
The extensor carpi radialis muscle.
The interosseus muscle.
What 6 ligaments are involved in the stay apparatus?
The lateral collateral ligament of the elbow.
The suspensory ligament.
The accessory ligament of the DDFT.
The accessory ligament of the SDFT.
The distal sesamoidean ligaments.
The extensor slips.
What 3 tendons are involved in the stay apparatus?
The common digital extensor tendon.
The deep digital flexor tendon.
The superficial digital flexor tendon.
Where in the forelimb is bodyweight transmitted into the forelimb?
At the serrated face of the scapula via the serratus ventralis.
What is the main muscle that transfers bodyweight to the forelimb?
The serratus ventralis.
What must occur for the stay apparatus to be used?
The foot must be placed on the ground.
What prevents the pastern from overextending?
The palmar ligaments.
The straight sesamoidean ligament.
What are the only distal sesamoidean ligaments that are involved in the stay apparatus?
Only the straight and oblique distal sesamoidean ligaments.
What prevents overextension of the fetlock joint?
The interosseus muscle/suspensory ligament.
The proximal sesamoidean bones.
The sesamoidean ligaments.
When is support provided to the fetlock joint?
When the joint is under tension.
What features of the forelimb provide further support to the fetlock joint?
The deep digital flexor tendon.
The superficial digital flexor tendon.
The check ligaments associated with these 2 tendons.
