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Elbow Muscles - Horse Anatomy (view source)
Revision as of 17:31, 15 October 2012
, 17:31, 15 October 2012Created page with "==='''Extensors'''=== '''''Triceps brachii''''' :'''Innervation''': Radial n. from the brachial plexus :It has three heads: :'''Origin''': ::''Long'' head: Caudal margin of..."
==='''Extensors'''===
'''''Triceps brachii'''''
:'''Innervation''': Radial n. from the brachial plexus
:It has three heads:
:'''Origin''':
::''Long'' head: Caudal margin of the scapula
::''Lateral'' and ''Medial'' heads: Shaft of the humerus (lateral and medial aspects, respectively)
:'''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
'''''Triceps brachii'''''
:'''Innervation''': Radial n. from the brachial plexus
:It has three heads:
:'''Origin''':
::''Long'' head: Caudal margin of the scapula
::''Lateral'' and ''Medial'' heads: Shaft of the humerus (lateral and medial aspects, respectively)
:'''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