Origins and Insertions Flashcards
Sternocleidomastoid
O: Sternum, Clavicle
I: Mastoid Process
Sternocleidomastoid Function
Flexes head side to side, rotates it
Diaphragm
O: Sternum, rib cartilage, L
I: Central tendon
Rectus Abdominis
O: Pubic crest, symphysis pubis
I: Xiphoid process, interior ribs
Rectus Abdominis Function
Flex, exhaling, defecation
External Oblique
O: 5-12 Ribs
I: Iliac crest, linea alba, pubis
External Oblique Function
Flex, rotate vertebral, compress abdomen
Pectoralis Major
O: Clavicle, lower sternum, costal cartilage, external oblique muscles
I: Intertubercular groove
Pectoralis Major Function
Internal rotation, adduction, flexion
Latissimus Dorsi
O: L, T, iliac crest, sacrum
I: Humerus
Latissimus Dorsi Function
Adductor, extensor, internal rotator
Supraspinatus
O: Supraspinous fossa
I: Greater tubercle
Supraspinatus Function
Stabilize shoulder, adducts
Infraspinatus
O: Infraspinous fossa
I: Greater tubercle
Infraspinatus Function
Stabilize shoulder, laterally rotates
Teres minor
O: Lateral border
I: Greater tubercle
Teres Minor Function
Stabilize shoulder, laterally rotates
Subscapularis
O: Subscapular fossa
I: Lesser tubercle
Subscapularis Function
Stabilizes shoulder, rotates medially
Trapezius
O: Nuchal line, C, T
I: Clavicle, scapular spine
Trapezius Function
Elevation, adduction, extends neck
Biceps Brachii
O: Coracoid process, supraglenoid tubercle
I: Radial tuberosity
Biceps Brachii Function
Supinates forearm, flex elbow