Changes

: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

'''''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

'''''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