Muscles Flashcards
Shoulder extensors
Biceps brachii
Brachiocephalicus
Shoulder flexors
Latissimus dorsi
Deltoideus
Teres major
Triceps - long head
Elbow extensors
Triceps
Elbow flexors
Biceps brachii
Brachialis
Carpus extensors
Extensor carpi radialis
Extensor carpi ulnaris
Digit extensors
Common digital extensor
Lateral digital extensor
Carpus flexors
Flexor carpi radialis
Flexor carpi ulnaris
Digits flexors
Superficial digital flexor
Deep digital flexor
Trapezius
Origin..
Insertion..
Action..
2 parts
1.cervical o- median raphe of neck
I- scapula spine
- Thoracic o- supraspinous ligament of thoracic vertebrae
I- proximal third of scapula spine
A- protraction of scapula
Omotransversarius
Origin..
Insertion..
Action..
O- cervical vertebrae
I- scapula spine and acromion
A- protraction of limb
Rhomboideus
Origin..
Insertion..
Action..
2 parts
1. Cervical part o- median raphe of neck
- Thoracic part o- spinous processes 4th to 7th vertebrae
I- dorsal border of scapula
A- elevate limb
Serratus ventralis
Origin..
Insertion..
Action..
O- last 5 vertebral vertebrae
I- facies serrata of the scapula
A- retractor of the limb
Brachiocephalicus
Origin..
Insertion..
Action..
Brachiocephalicus 3 parts: Proximal to clavicle are Cleidomastoideus from the head Cleidocervicalis from the neck Collectively cleidocephalicus
Distal to clavicle
Cleidobrachialis runs to humerus
A- protract the limb
Superficial pectoral
Origin..
Insertion..
Action…
O-cranial end of sternum
I- major tubercle of humerus
A- adducts the limb
Deep pectoral
Origin..
Insertion..
Action..
O- entire length of sternum
I- Minor tubercle of humerus
A- retract and adduct the limb
Deltoideus
Origin..
Insertion..
Action..
2 parts O- spine of scapula O- acromial process of scapula I- deltoid tuberosity A- flexor of shoulder
Triceps
Origin..
Insertion..
Action..
- Long head
O- caudal border of scapula
I- olecranon tuber
A-extend and flex shoulder
2.lateral head
O-triceptial line of humerus
I- olecranon tuber
A- extend elbow
3.accessory head
4. Medial head
O- proximal third of humerus
I- form common tendon and insert on olecranon process
A- extend elbow
Supraspinatus
Origin..
Insertion..
Action..
O- supraspinatous fossa
I- major tubercle humerus
A- extension of shoulder
Infraspinatus
Origin..
Insertion..
Action..
O- infra spinous fossa
I- just distal to greater tubercle of humerus
A- flex or extend shoulder depending on limb position
Teres minor
Origin..
Insertion..
Action..
O- caudal edge of scapula
I- proximal to deltoid tuberosity
A-shoulder joint capsule muscle
Subscapularis
Origin..
Insertion..
Action..
O- sub scapular fossa
I- by short tendon on minor tubercle of. Humerus
A- extends shoulder joint
Teres major
Origin..
Insertion..
Action..
O- caudal edge of humerus
I- medial humerus
A- shoulder flexor
Biceps brachii
Origin..
Insertion..
Action..
O- by long tendon on supraglenoid tuberosity
I- by way of 2 tendons onto the radius and ulna
A- flexor of elbow
Extensor of shoulder
Brachialis
Origin..
Insertion..
Action..
O- proximal caudal humerus
I- proximal ulna
A- flexor of elbow
Extensor carpi radialis
Origin..
Insertion..
Action..
O- lateral distal humerus
I- carpal bones
A- extensor or carpus
Flexor of elbow
Common digital extensor
Origin..
Insertion..
Action..
O- lateral epicondyle of humerus
I- distal phalanges of digits 2 to 5
A- extends carpus and digits 2 to 5
Lateral digital extensor
Origin..
Insertion..
Action..
O- proximal radius and ulna
I- distal phalanges of digits 3,4 and 5
A- extension of digits 3,4 and 5
Ulnaris lateralis
Origin..
Insertion..
Action..
O- lateral epicondyle of humerus
I- proximal end of metacarpal 5
A- extension or flexion of carpus depending on position of limb
Supinator
Origin..
Insertion..
Action..
O- lateral collateral ligament and lateral epicondyle of humerus
I- cranial surface of radius
A- rotation of paw so Palmer surface faces medially
Flexor carpi radialis
Origin..
Insertion..
Action..
O- medial epicondyle
I- Palmer aspect of metacarpals 2 and 3
A- flexor of carpus
Superficial digital flexor
Origin..
Insertion..
Action..
O-medial epicondyle of humerus
I- Palmer proximal edge of middle phalanx all digits
A- flexor of digits
Flexor carpi Ulnaris
Origin..
Insertion..
Action..
2 heads 1. O- weaker head from proximal ulna 2. O- strong head from medial epicondyle humerus I- accessory carpal bone A-flexor of carpus
Deep digital flexor
Origin..
Insertion..
Action..
3 heads
Humeral head o- medial epicondyle of humerus
Radial head o- medial border of radius
Ulnar head o- caudal border of ulna
All heads unite to form the strong tendon which then splits and
I- distal phalanges of all digits
A- flexor of digits
