Muscles Flashcards by hannah smith

Shoulder extensors

Biceps brachii

Brachiocephalicus

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Shoulder flexors

Latissimus dorsi
Deltoideus
Teres major
Triceps - long head

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Elbow extensors

Triceps

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Elbow flexors

Biceps brachii

Brachialis

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Carpus extensors

Extensor carpi radialis

Extensor carpi ulnaris

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Digit extensors

Common digital extensor

Lateral digital extensor

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Carpus flexors

Flexor carpi radialis

Flexor carpi ulnaris

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Digits flexors

Superficial digital flexor

Deep digital flexor

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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

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Omotransversarius
Origin..
Insertion..
Action..

O- cervical vertebrae
I- scapula spine and acromion
A- protraction of limb

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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

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Serratus ventralis
Origin..
Insertion..
Action..

O- last 5 vertebral vertebrae
I- facies serrata of the scapula
A- retractor of the limb

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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

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Superficial pectoral
Origin..
Insertion..
Action…

O-cranial end of sternum
I- major tubercle of humerus
A- adducts the limb

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Deep pectoral
Origin..
Insertion..
Action..

O- entire length of sternum
I- Minor tubercle of humerus
A- retract and adduct the limb

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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