Difference between revisions of "Elbow Muscles - Horse Anatomy"

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==='''Extensors'''===
 
==='''Extensors'''===
  
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:It has three heads:  
 
:It has three heads:  
 
:'''Origin''':
 
:'''Origin''':
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::''Long'' head: Caudal margin of the [[Limb Bones and Cartilages - Horse Anatomy#Scapula|scapula]]
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::''Long'' head: Caudal margin of the [[Bones and Cartilages - Horse Anatomy#Scapula|scapula]]
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::''Lateral'' and ''Medial'' heads: Shaft of the [[Limb Bones and Cartilages - Horse Anatomy#Humerus|humerus]] (lateral and medial aspects, respectively)
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::''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
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:'''Action''': Extends and stabilizes the [[Joints and Ligaments - Horse Anatomy#Elbow Joint|elbow]]
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:'''Action''': Extends and stabilizes the elbow
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'''''Tensor fasciae antebrachii'''''  
 
'''''Tensor fasciae antebrachii'''''  
 
:'''Innervation''': Radial n. from the brachial plexus
 
:'''Innervation''': Radial n. from the brachial plexus
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:Overlies the triceps extending from the [[Limb Bones and Cartilages - Horse Anatomy#Scapula|scapula]] to the olecranon
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:Overlies the triceps extending from the [[Bones and Cartilages - Horse Anatomy#Scapula|scapula]] to the olecranon
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:'''Origin''': Caudal border of the [[Limb Bones and Cartilages - Horse Anatomy#Scapula|scapula]]
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:'''Origin''': Caudal border of the [[Bones and Cartilages - Horse Anatomy#Scapula|scapula]]
 
:'''Insertion''':Antebrachial fascia
 
:'''Insertion''':Antebrachial fascia
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:'''Action''': Tenses antibrachial fascia and extends the [[Joints and Ligaments - Horse Anatomy#Elbow Joint|elbow]]
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:'''Action''': Tenses antibrachial fascia and extends the elbow
  
 
'''''Anconeus'''''  
 
'''''Anconeus'''''  
 
:'''Innervation''': Radial n. from the brachial plexus
 
:'''Innervation''': Radial n. from the brachial plexus
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:'''Origin''': Distal [[Limb Bones and Cartilages - Horse Anatomy#Humerus|humerus]] and olecranon fossa,deep to the triceps
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:'''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
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:'''Action''': Extends the [[Joints and Ligaments - Horse Anatomy#Elbow Joint|elbow]]
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:'''Action''': Extends the elbow
  
 
==='''Flexors'''===
 
==='''Flexors'''===
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'''''Biceps brachii'''''  
 
'''''Biceps brachii'''''  
 
:'''Innervation''': Musculocutaneous n. from the brachial plexus
 
:'''Innervation''': Musculocutaneous n. from the brachial plexus
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:'''Origin''': Supraglenoid tubercle of the [[Limb Bones and Cartilages - Horse Anatomy#Scapula|scapula]]
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:'''Origin''': Supraglenoid tubercle of the scapula
 
:'''Insertion''': Distally, the muscle divides into a medial and lateral portion.  
 
:'''Insertion''': Distally, the muscle divides into a medial and lateral portion.  
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:: Medial - Medial tuberosity on the proximal [[Limb Bones and Cartilages - Horse Anatomy#Radius and Ulna|radius]]
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:: Medial - Medial tuberosity on the proximal radius
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:: Lateral - Proximal [[Limb Bones and Cartilages - Horse Anatomy#Radius and Ulna|radius and ulna]]
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:: Lateral - Proximal radius and ulna
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:It runs through the intertubercular groove of the [[Limb Bones and Cartilages - Horse Anatomy#Humerus|humerus]] facilitated by the '''bicipital bursa'''.
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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 [[Joints and Ligaments - Horse Anatomy#Elbow Joint|elbow]], extends and stabilises the [[Joints and Ligaments - Horse Anatomy#Shoulder Joint|shoulder]] during the stance phase
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::'''Action''': Flexes the elbow, extends and stabilises the shoulder during the stance phase
  
 
'''''Brachialis'''''  
 
'''''Brachialis'''''  
 
:'''Innervation''': Musculocutaneous n. from the brachial plexus
 
:'''Innervation''': Musculocutaneous n. from the brachial plexus
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:'''Origin''': Proximocaudal [[Limb Bones and Cartilages - Horse Anatomy#Humerus|humerus]]
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:'''Origin''': Proximocaudal humerus
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:'''Insertion''': Spirals to insert next to biceps on the medial [[Limb Bones and Cartilages - Horse Anatomy#Radius and Ulna|radius]]
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:'''Insertion''': Spirals to insert next to biceps on the medial radius
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:'''Action''': Flexes the [[Joints and Ligaments - Horse Anatomy#Elbow Joint|elbow]]
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:'''Action''': Flexes the elbow
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[[Category:Muscles - Horse Anatomy]]
 

Revision as of 10:31, 31 October 2012

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
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