Changes

====Muscles of the Elbow====

====Muscles of the Elbow====

*Extensors

''Extensors''

**'''Triceps brachii''': Three heads, four in the dog

*'''Triceps brachii''': Three heads, four in the dog

***Long head: caudal margin of the scapula

**Long head: caudal margin of the scapula

***Lateral, medial, and accessory heads: shaft of the humerus

**Lateral, medial, and accessory heads: shaft of the humerus

***Insertion: olecranon, proteced by tricipital bursa against the bone and subcutaneous bursa against the skin

**Insertion: olecranon, proteced by tricipital bursa against the bone and subcutaneous bursa against the skin

**'''Tensor fasciae antebrachii'''

*'''Tensor fasciae antebrachii'''

***Overlies triceps extending from scapula to olecranon

**Overlies triceps extending from scapula to olecranon

**'''Anconeus'''

*'''Anconeus'''

***Origin: distal humerus

**Origin: distal humerus

***Insertion: lateral olecranon

**Insertion: lateral olecranon

**Innervation: Radial nerve from the brachial plexus

*Innervation: Radial nerve from the brachial plexus

*Flexors

 

**'''Biceps brachii'''

 

***Origin: supraglenoid tubercle of the scapula

''Flexors''

***Insertion: medial tuberosity of proximal radius and adjacent ulna

*'''Biceps brachii'''

***Runs through the intertubercular groove of the humerus

**Origin: supraglenoid tubercle of the scapula

**'''Brachialis'''

**Insertion: medial tuberosity of proximal radius and adjacent ulna

***Origin: proximocaudal humerus

**Runs through the intertubercular groove of the humerus

***Insertion: spirals to insert next to biceps

*'''Brachialis'''

**Innervation: Musculocutaneous n.

**Origin: proximocaudal humerus

**Insertion: spirals to insert next to biceps

*Innervation: Musculocutaneous n.

====Muscles of Supination and Pronation ====

====Muscles of Supination and Pronation ====