Superficial Pectoral
- Descending
- Transverse
O: 1. Manubrium
2. First two or three sternebrae
I: Crest of greater tubercle of humerus
A: Adduct the forelimb and draw the limb forward or backward
I: Pectorales cranialis n.Brachiocephalicus
- Cleidobrachialis
O: Clavicular intersection
I: Distal cranial border of humerus and crest of greater tubercle
A: Draw limb forward or laterally, draw head and neck to the side
I: Accessory n. and branches of cervical spinal nn.
Brachiocephalicus
- Cleidocephalicus
- Cleidomastoid
O: Clavicular intersection
I: 1. Median raphe of cranial half of neck and
occasionally nuchal crest of occipital bone
2. Mastoid process of temporal bone
A: Draw limb forward or laterally, draw head and neck to the side
I: Accessory n. and branches of cervical spinal nn.
Omotransversarius
O: Transverse process (wing) of atlas
I: Distal scapular spine
A: Raise the scapula and move limb foreward
I: Accessory n.
Trapezius
- Cervical part
- Thoracic part
O: 1. Median raphe of the neck
2. Supraspinous ligement from T3 - T9
I: Scapular spine
A: Elevate and abduct the forelimb
I: Accessory n.Rhomboideus
- Capitis
- Cervicis
- Thoracis
O: 1. Nuchal crest of occipital bone
2. Median raphe of neck
3. Spinous processes of T1 - T7
I: 1. Cranial dorsal border of scapula
2 +3: Dorsal border of scapula
A: Elevate limb and pull limb and shoulder forward or backward, draw the scapula against the trunk
I: Rami dorsales of cervicales et thoracicales nn.
Deep Pectoral
O: Ventral sternum (deep abdominal fascia at caudal sternum)
I: Lesser tubercle of humerus, greater tubercle of humerus, crest of greater tubercle
A: Adduct and retract forelimb
I: Pectorales caudalis and pectorales cranialis nn.
Latissimus dorsi
O: Thoracolumbar fascia from spinous processes of lumbar and last 7 or 8 thoracic vertebrae, last two or three ribs
I: Teres major tuberosity
A: Draw limb caudally or flex shoulder
I: Pectorales caudalis and thoracodorsalis nn.
Serratus ventralis
- Cervicis
- Thoracis
O: 1. Transverse processes of C3 - C7
2. First seven or eight ribs ventral to middle
I: Serrated face of scapula
A: Support trunk, carry shoulder forward or backward, depress scapula
I: Cervicales and thoracicales nn.
Supraspinatus
O: Supraspinous fossa and spine of scapula
I: Greater tubercle of humerus
A: Extend shoulder and stabilize the shoulder joint
I: Suprascapularis n.
Infraspinatus
O: Infraspinous fossa and spine of scapula
I: Lateral side of greater tubercle of humerus
A: Abduct shoulder, rotate humerus laterally, flex or extend the shoulder, stabilize shoulder joint
I: Suprascapularis n.
Triceps
- Long head
- Lateral head
- Medial head
- Accessory head
O: 1. Distal caudal border of scapula and
infraglenoid tuberosity
2. Tricipital line of humerus
3. Medial humerus
4. Proximal caudal part of neck of humerus
I: Olecranon tuber of ulna
A: Flex the shoulder or extend the elbow
I: Radial n.Deltoideus
- Scapular part
- Acromial part
O: 1. Spine of the scapula
2. Acromion process of scapula
I: Deltoid tuberosity
A: Flex the shoulder
I: Axillary n.Brachialis
O: Caudomedial humerus (brachialis groove)
I: Ulnar tuberosity
A: Flexes the elbow
I: Musculocutaneous n.
Biceps brachii
O: Supraglenoid tubercle of humerus
I: Radial and ulnar tuberosities
A: Extends the shoulder or flexes the elbow
I: Musculocutaneous n.
Teres major
O: Caudal angle of scapula
I: Teres major tuberosity of humerus
A: Flex the shoulder and draw the leg back
I: Axillary n.
Teres minor
O: Caudal angle of scapula
I: Teres minor tuberosity
A: Flex the shoulder
I: Axillary n.
Extensor carpi radialis
O: Lateral supracondylar crest
I: Tuberosities on dorsal surface of metacarpals II and III
A: Extend the carpus
I: Radial n
Common digital extensor
O: Lateral epicondyle of humerus
I: Extensor process of P3 of digits II, III, IV, and V
A: Extend the carpus and digits
I: Radial n.
Lateral digital extensor
O: Lateral collateral ligament of elbow and lateral epicondyle of humerus
I: Extensor process of P3 of digits III, IV and V
A: Extend digits III, IV, and V
I: Radial n.
Ulnaris lateralis
O: Lateral epicondyle of humerus
I: Accessory carpal bone and proximal metacarpal V
A: Flex and abduct the carpus
I: Radial n.
Flexor carpi ulnaris
- Ulnar head
- Humeral head
O: 1. Proximal end of ulna
2. Medial epicondyle of humerus
I: Accessory carpal bone
A: Flex the forepaw
I: Ulnar n.Superficial digital flexor
O: Medial epicondyle of humerus
I: Caudal aspect of each middle phalanx
A: Flex the forepaw
I: Median n.
Deep digital flexor
- Ulnar head
- Humeral head
- Radial head
O: 1. Caudal border of ulna
2. Medial epicondyle
3. Medial border of radius
I: Flexor tubercle of P3 of all digits
A: 1. Flex carpus
2. Extend the elbow
3. Flex the digits
I: 1. Ulnar n.
2. Median n. and ulnar n.
3. Median n.
