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====Muscles of the Shoulder====
 
====Muscles of the Shoulder====
 
These muscles are grouped:
 
These muscles are grouped:
*Lateral:'''Supraspinatus ''' and '''Infraspinatus'''
+
*Lateral:'''Supraspinatus ''' and '''Infraspinatus''', Suprascapular n. of the brachial plexus
 
**Origin: the fossae of the scapula
 
**Origin: the fossae of the scapula
 
**Insertion: both tubercles of the humerus
 
**Insertion: both tubercles of the humerus
 
**Action: brace the shoulder  
 
**Action: brace the shoulder  
**Innervation: Suprascapular n. of the brachial plexus
   
**Clinical significance: bursa between the tendon of the infraspinatus and lateral tubercle of the humerus can be the site of inflammation
 
**Clinical significance: bursa between the tendon of the infraspinatus and lateral tubercle of the humerus can be the site of inflammation
 
*Medial:
 
*Medial:
**'''Supscapularis'''
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**'''Supscapularis''': Subscapular n. from the brachial plexus
 
***Origin: Deep surface of the scapula
 
***Origin: Deep surface of the scapula
 
***Insertion: medial tubercle of the humerus
 
***Insertion: medial tubercle of the humerus
 
***Action: braces medial shoulder joint, potential adductor
 
***Action: braces medial shoulder joint, potential adductor
***Innervation: Subscapular nerve from the brachial plexus
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**'''Coracobrachialis''': Musculocutaneous n. of the brachial plexus
**'''Coracobrachialis'''
   
***Origin: medial supraglenoid tubercle
 
***Origin: medial supraglenoid tubercle
 
***Insertion: proximal shaft of the humerus
 
***Insertion: proximal shaft of the humerus
 
***Action: fixator
 
***Action: fixator
***Innervation: Musculocutaneous nerve of the brachial plexus
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*Caudal (Flexors): Axillary n. of the brachial plexus
*Caudal (Flexors):
   
**'''Deltoids'''
 
**'''Deltoids'''
 
***Origin: caudal border and spine of the scapula
 
***Origin: caudal border and spine of the scapula
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**'''Teres Minor'''
 
**'''Teres Minor'''
 
**Actions: Act together to flex the shoulder joint
 
**Actions: Act together to flex the shoulder joint
**Innervation: Axillary nerve of the brachial plexus
   
*There are no defined extensors of the shoulder.  Those involved (brachiocephalic m., biceps brachii, supraspinatus, and ascending pectorals) have other, more primary roles.
 
*There are no defined extensors of the shoulder.  Those involved (brachiocephalic m., biceps brachii, supraspinatus, and ascending pectorals) have other, more primary roles.
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====Muscles of the Elbow====
 
====Muscles of the Elbow====
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