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18 terms

Equine Forelimb: Muscles

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Subclavius
Below clavicular tendon
Assists pectoral muscles
Deep fascia responsible for long standing
Biceps brachii
Supported by independent bursa
Grooved cartilaginous tendon
Lacertus fibrosus
Internal tendon
Lacertus fibrosus
Fibrous structure covering biceps
Extends carpus when biceps resists collapse of shoulder under the weight of the trunk due to attachment to ECR
Internal tendon
Extends shoulder
Biceps as fixator
Origin from supraglenoid tubercle
Caudomedial muscles
FCR, FCU, SDF and DDF
Superior check ligament of SDF
Purely tendinous and arises from caudal aspect of radius, joins at distal 1/4
Inferior check ligament of DDF
Arises from palmar aspect of thick fibrous joint capsule of carpus and joins DDF mid cannon
Craniolateral muscles
CDE, Lat DE, ECR, ECO
CDE
Broadens below fetlock after receiving process from SL
Lat DE
Prominent ridge of lat aspect
Joins CDE at fetlock and inserts on P1
ECR
Receives LF covering biceps the oppose carpal flexion
ECO
Poorly developed
Passive stay apparatus
Serratus ventralis transmits weight of cranial part of trunk on to medial aspect of scapula
Flexion of shoulder opposed by
IT of biceps
Cartilaginous biceps tendon that moulds within the biciptal groove- fixator
Flexion of elbow opposed by
Direct weight of trunk
Deep fascia of triceps passively extends
Biceps brachiis tenses when elbow attempts to flex elbow which builds pressure on cartilaginous tendon and IT which fix shoulder
Overextension/flexion of carpus is opposed by
Tension transmitted to ECR, which fixes carpus, which prevents buckling
Accessory carpal ligament, palmar capsular ligament and flexor retinaculum
Overextension of fetlock is opposed by
Suspensory apparatus of fetlock: SL, prox sesamoids and dist sesamoidean ligaments
Accessory check ligaments stabilise pastern and coffin joints passively