Muscular System 2 Flashcards
Sternocephalicus
O-sternum
I-occipital bone
A-draws head side to side/up and down
Sternocephalicus
Linea Alba
Rectus abdominis
O- sternum
I- pubis
A- flexes vertebral column/ abdominal press
External abdominal oblique
O- last 9 ribs and thoracolumbar fascia
I- linea alba
A- compresses the abdomen/ abdominal press/rotation
Transversus abdominis
O- thoraclumbar fascia/transverse processes of lumbar vertebra/iliac crest
I- linea alba
A- compresses the abdomen/ abdominal press
Internal abdominal oblique
O- thoracolumbar fascia and iliac crest
I- linea alba
A- compresses the abdomen/abdominal press/ rotation
Digastricus
O-occipital & temporal
I-ventral mandible
A-opens mouth
Masseter
O- zygomatic arch
I-lateral side of mandible
A-closes mouth
Temporalis
O-parietal bone
I-coronoid process of mandible
A- closes mouth
Infraspinatus
O-Infraspinous fossa of scapula
I-greater tubercle of humerus
A-flexes shoulder; abducts forelimb
Infraspinatus
Subscapularis
O-subscalular fossa of scapula
I-lesser tubercle of humerus
A- abducts forelimb; rotates medially
Supraspinatus
O-supraspinous fossa of scapula
I-greater tubercle of humerus
A- extends shoulder
Extensor carpi radialis
O-distal lateral humerus
I- proximal metacarpals 2 & 3
A-extends carpus
Common digital extensor
O-lateral epicondyle of humerus
I-dorsal distal phalanges 2-5
A- extends carpus and digits
Lateral digital extensor
O-lateral epicondyle of humerus
I- proximal digits 3,4,5
A- extends carpus and digits 3,4,5
Extensor carpi ulnaris
O- lateral epicondyle of humerus
I- lateral metacarpal 5 & accessory carpal bone
A- extension and abduction of carpus
Flexor carpi radialis
O- medial epicondyle of humerus
I- palmar aspect metacarpal 2 &3
A- flexes carpus
Flexor carpi ulnaris
O- medial epicondyle of humerus and olecranon
I- accessory carpal bone
A- flexes carpus
Superficial digital flexor
O- medial epicondyle of humerus
I-palmar middle phalanges 2-5
A- flexes carpus and digits 2-5
Deep digital flexor
O- medial epicondyle of humerus/ proximal ulna&radius
I- palmar distal phalanges 1-5
A- flexes carpus and digits 1-5
Antibrachium
Forearm area
Brachialis
O- proximal humerus
I- proximal ulna and radius
A- flexes elbow
Biceps brachii
O- scapula
I-proximal ulna and radius
A- flexes elbow; extends shoulder
