13.1 Muscles that move the pectoral girdle and glenohumeral joint

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action of supraspinatus (RC)

humerus

insertion of teres minor (RC)

humerus

insertion of biceps brachii (short head)

radial

origin of pectoralis minor

upper ribs

origin of pectoralis major

sternum

origin of deltoid (anterior fibers)

clavicle (lateral third)

action of pectoralis minor

depresses the scapula

action of rhomboid minor

elevate scapula

action of levator scapulae

elevates the scapula

action of teres major

extends rotates arm

action of triceps brachii (long head)

extends, adducts arm

action of latissimus dorsi

extends, adducts, medially rotates arm

action of pectoralis major

flexes arm

action of biceps brachii (long head)

flexes arm (weak)

action of biceps brachii (short head)

flexes arm (weak)

action of deltoid (anterior fibers)

flexes rotates arm

insertion of deltoid (anterior fibers)

humerus

insertion of infraspinatus (RC)

humerus

insertion of pectoralis major

humerus

insertion of subscapularis (RC)

humerus

insertion of supraspinatus (RC)

humerus

insertion of teres major

humerus

insertion of latissimus dorsi

humerus (intertubercular groove)

origin of latissimus dorsi

iliac crest

biceps brachii

infraglenoid tubercle of scapula

brachialis

orgin: humerus insertion: ulna. action: flexes

action of serratus anterior

protract scapula

insertion of biceps brachii

radial

origin of serratus anterior

ribs 1-8 (outer surface), upper ribs

action of infraspinatus (RC)

rotates arm

action of subscapularis (RC)

rotates arm

action of teres minor (RC)

rotates arm

insertion of levator scapulae

scapula

insertion of pectoralis minor

scapula

insertion of rhomboid major

scapula

insertion of rhomboid minor

scapula

insertion of serratus anterior

scapula

insertion of triceps brachii (long head)

scapula

origin of biceps brachii

scapula

origin of biceps brachii (short head)

scapula

origin of infraspinatus (RC)

scapula

origin of subscapularis (RC)

scapula

origin of supraspinatus (RC)

scapula

origin of teres major

scapula

origin of teres minor (RC)

scapula

origin of triceps brachii (long head)

scapula

origin of rhomboid major

spines

origin of rhomboid minor

spines

action of rhomboid major

stabilizes the scapula

origin of levator scapulae

transverse processes


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