Difference between revisions of "Elbow Muscles - Horse Anatomy"
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Latest revision as of 20:08, 9 January 2013
Extensors
Triceps brachii
- Innervation: Radial n. from the brachial plexus
- It has three heads:
- Origin:
- Insertion: Olecranon, proteced by the tricipital bursa against the bone, and subcutaneous bursa against the skin
- Action: Extends and stabilizes the elbow
Tensor fasciae antebrachii
- Innervation: Radial n. from the brachial plexus
- Overlies the triceps extending from the scapula to the olecranon
- Origin: Caudal border of the scapula
- Insertion:Antebrachial fascia
- Action: Tenses antibrachial fascia and extends the elbow
Anconeus
- Innervation: Radial n. from the brachial plexus
- Origin: Distal humerus and olecranon fossa,deep to the triceps
- Insertion: Lateral olecranon, joining the lateral head of the triceps
- Action: Extends the elbow
Flexors
Biceps brachii
- Innervation: Musculocutaneous n. from the brachial plexus
- Origin: Supraglenoid tubercle of the scapula
- Insertion: Distally, the muscle divides into a medial and lateral portion.
- Medial - Medial tuberosity on the proximal radius
- Lateral - Proximal radius and ulna
- It runs through the intertubercular groove of the humerus facilitated by the bicipital bursa.
Brachialis
- Innervation: Musculocutaneous n. from the brachial plexus
- Origin: Proximocaudal humerus
- Insertion: Spirals to insert next to biceps on the medial radius
- Action: Flexes the elbow
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