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| | ====[[Muscles of the Elbow- Horse Anatomy|Muscles of the Elbow]]==== | | ====[[Muscles of the Elbow- Horse Anatomy|Muscles of the Elbow]]==== |
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| − | ====='''Extensors'''===== | + | ====[[Muscles of the Carpal and Digital Joints-Horse Anatomy| Muscles of the Carpal and Digital Joints]]==== |
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| − | '''''Triceps brachii'''''
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| − | :'''Innervation''': Radial n. from the brachial plexus
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| − | :It has three heads:
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| − | :'''Origin''':
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| − | ::''Long'' head: Caudal margin of the scapula
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| − | ::''Lateral'' and ''Medial'' heads: Shaft of the humerus (lateral and medial aspects, respectively)
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| − | :'''Insertion''': Olecranon, proteced by the tricipital bursa against the bone, and subcutaneous bursa against the skin
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| − | :'''Action''': Extends and stabilizes the elbow
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| − | | |
| − | '''''Tensor fasciae antebrachii'''''
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| − | :'''Innervation''': Radial n. from the brachial plexus
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| − | :Overlies the triceps extending from the scapula to the olecranon
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| − | :'''Origin''': Caudal border of the scapula
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| − | :'''Insertion''':Antebrachial fascia
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| − | :'''Action''': Tenses antibrachial fascia and extends the elbow
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| − | | |
| − | '''''Anconeus'''''
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| − | :'''Innervation''': Radial n. from the brachial plexus
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| − | :'''Origin''': Distal humerus and olecranon fossa,deep to the triceps
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| − | :'''Insertion''': Lateral olecranon, joining the lateral head of the triceps
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| − | :'''Action''': Extends the elbow
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| − | | |
| − | ====='''Flexors'''=====
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| − | | |
| − | '''''Biceps brachii'''''
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| − | :'''Innervation''': Musculocutaneous n. from the brachial plexus
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| − | :'''Origin''': Supraglenoid tubercle of the scapula
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| − | :'''Insertion''': Distally, the muscle divides into a medial and lateral portion.
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| − | :: Medial - Medial tuberosity on the proximal radius
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| − | :: Lateral - Proximal radius and ulna
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| − | :It runs through the intertubercular groove of the humerus facilitated by the '''bicipital bursa'''.
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| − | ::'''Action''': Flexes the elbow, extends and stabilises the shoulder during the stance phase
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| − | | |
| − | '''''Brachialis'''''
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| − | :'''Innervation''': Musculocutaneous n. from the brachial plexus
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| − | :'''Origin''': Proximocaudal humerus
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| − | :'''Insertion''': Spirals to insert next to biceps on the medial radius
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| − | :'''Action''': Flexes the elbow
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| − | | |
| − | ====Muscles of the Carpal and Digital Joints====
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| | The horse, as well as other domestic mammals, have a limited range of motion in the carpal joints compared with humans; therefore these muscles act as either extensors or flexors. | | The horse, as well as other domestic mammals, have a limited range of motion in the carpal joints compared with humans; therefore these muscles act as either extensors or flexors. |
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