Difference between revisions of "Elbow Muscles - Horse Anatomy"
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(Created page with "==='''Extensors'''=== '''''Triceps brachii''''' :'''Innervation''': Radial n. from the brachial plexus :It has three heads: :'''Origin''': ::''Long'' head: Caudal margin of...") |
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| Line 5: | Line 5: | ||
:It has three heads: | :It has three heads: | ||
:'''Origin''': | :'''Origin''': | ||
| − | ::''Long'' head: Caudal margin of the scapula | + | ::''Long'' head: Caudal margin of the [[Bones and Cartilages - Horse Anatomy#Scapula|scapula]] |
| − | ::''Lateral'' and ''Medial'' heads: Shaft of the humerus (lateral and medial aspects, respectively) | + | ::''Lateral'' and ''Medial'' heads: Shaft of the [[Bones and Cartilages - Horse Anatomy#Humerus|humerus]] (lateral and medial aspects, respectively) |
:'''Insertion''': Olecranon, proteced by the tricipital bursa against the bone, and subcutaneous bursa against the skin | :'''Insertion''': Olecranon, proteced by the tricipital bursa against the bone, and subcutaneous bursa against the skin | ||
:'''Action''': Extends and stabilizes the elbow | :'''Action''': Extends and stabilizes the elbow | ||
| Line 12: | Line 12: | ||
'''''Tensor fasciae antebrachii''''' | '''''Tensor fasciae antebrachii''''' | ||
:'''Innervation''': Radial n. from the brachial plexus | :'''Innervation''': Radial n. from the brachial plexus | ||
| − | :Overlies the triceps extending from the scapula to the olecranon | + | :Overlies the triceps extending from the [[Bones and Cartilages - Horse Anatomy#Scapula|scapula]] to the olecranon |
| − | :'''Origin''': Caudal border of the scapula | + | :'''Origin''': Caudal border of the [[Bones and Cartilages - Horse Anatomy#Scapula|scapula]] |
:'''Insertion''':Antebrachial fascia | :'''Insertion''':Antebrachial fascia | ||
:'''Action''': Tenses antibrachial fascia and extends the elbow | :'''Action''': Tenses antibrachial fascia and extends the elbow | ||
| Line 19: | Line 19: | ||
'''''Anconeus''''' | '''''Anconeus''''' | ||
:'''Innervation''': Radial n. from the brachial plexus | :'''Innervation''': Radial n. from the brachial plexus | ||
| − | :'''Origin''': Distal humerus and olecranon fossa,deep to the triceps | + | :'''Origin''': Distal [[Bones and Cartilages - Horse Anatomy#Humerus|humerus]] and olecranon fossa,deep to the triceps |
:'''Insertion''': Lateral olecranon, joining the lateral head of the triceps | :'''Insertion''': Lateral olecranon, joining the lateral head of the triceps | ||
:'''Action''': Extends the elbow | :'''Action''': Extends the elbow | ||
Revision as of 10:31, 31 October 2012
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.
- Action: Flexes the elbow, extends and stabilises the shoulder during the stance phase
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