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Tendons - Horse Anatomy (view source)
Revision as of 12:47, 11 October 2012
, 12:47, 11 October 2012→Thoracic Limb
The common digital extensor tendon passes over the dorsolateral aspect of the carpus, continuing distally over the dorsal metacarpus. The branches of the interosseous muscle (suspensory ligament) join the common digital extensor tendon before its insertion on the extensor process of the distal phalanx. A minor branch inserts on the second phalanx and some fibres insert on the hoof cartilages. The common digital extensor tendon is surrounded by the extensor retinaculum and a protective synovial sheath. The tendon sheath begins approximately 10cm proximal to the carpus, extending distally to the level of the metacarpus.
The common digital extensor tendon passes over the dorsolateral aspect of the carpus, continuing distally over the dorsal metacarpus. The branches of the interosseous muscle (suspensory ligament) join the common digital extensor tendon before its insertion on the extensor process of the distal phalanx. A minor branch inserts on the second phalanx and some fibres insert on the hoof cartilages. The common digital extensor tendon is surrounded by the extensor retinaculum and a protective synovial sheath. The tendon sheath begins approximately 10cm proximal to the carpus, extending distally to the level of the metacarpus.
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'''''Lateral Digital Extensor Tendon'''''
'''''Lateral Digital Extensor Tendon'''''
*'''Origin''': Lateral digital extensor muscle on the lateral humeral epicondyle
*'''Origin''': Lateral digital extensor muscle on the lateral humeral epicondyle
The lateral digital extensor muscle arises from the lateral humeral epicondyle and forms the lateral digital extensor tendon on the lateral aspect of the antebrachium; caudal to the common digital extensor tendon. The tendon is enclosed within a synovial sheath as it extends distally over the metacarpus to insert on the dorsolateral aspect of the proximal phalanx.
The lateral digital extensor muscle arises from the lateral humeral epicondyle and forms the lateral digital extensor tendon on the lateral aspect of the antebrachium; caudal to the common digital extensor tendon. The tendon is enclosed within a synovial sheath as it extends distally over the metacarpus to insert on the dorsolateral aspect of the proximal phalanx.
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===Flexors===
===Flexors===
Arises at the distal metacarpus, approximately 5cm proximal to the metacarpophalangeal joint and extends to the middle of the second phalanx.
Arises at the distal metacarpus, approximately 5cm proximal to the metacarpophalangeal joint and extends to the middle of the second phalanx.
'''''Superficial Digital Flexor Tendon'''''
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'''''Superficial Digital Flexor Tendon (SDFT)'''''
*'''Origin''': Superficial digital flexor muscle on the medial humeral epicondlye
*'''Origin''': Superficial digital flexor muscle on the medial humeral epicondlye
*'''Insertion''': Middle phalanx
*'''Insertion''': Middle phalanx
The SDFT divides into two branches at the distal end of the proximal phalanx. The branches insert on the lateral and medial eminences of the middle phalanx, a minority of fibres also insert on the lateral aspect of the proximal phalanx.
The SDFT divides into two branches at the distal end of the proximal phalanx. The branches insert on the lateral and medial eminences of the middle phalanx, a minority of fibres also insert on the lateral aspect of the proximal phalanx.
'''Deep Digital Flexor Tendon (SDFT)'''
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'''''Deep Digital Flexor Tendon (SDFT)'''''
*'''Origin''': Deep digital flexor muscle on the medial humeral epicondyle, radius and ulna
*'''Origin''': Deep digital flexor muscle on the medial humeral epicondyle, radius and ulna
*'''Insertion''': Distal phalanx
*'''Insertion''': Distal phalanx
*Distal digital annular ligament
*Distal digital annular ligament
'''Suspensory Ligament (SL)'''
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'''''Suspensory Ligament (SL)'''''
*'''Origin''': Proximal region of third metacarpal (cannon bone) and distal row of carpal bones
*'''Origin''': Proximal region of third metacarpal (cannon bone) and distal row of carpal bones
*'''Insertion''': Proximal sesamoids, joins common digital extensor tendon
*'''Insertion''': Proximal sesamoids, joins common digital extensor tendon