o: 1-8 ribs or 1-9 ribs i: vertebral border and inferior angle of scapula a: abducts scapula and rotates it upward "boxers muscle"
teres minor
pectoralis minor
serratus anterior
cooracobrachialis
o: 2-5 or 3-5 ribs i: coracoid process a: abducts scapula and rotates it downward
infraspinatus
teres major
o: occipital bone, ligamentum nuchuae, spines of C7-T12 I: clavicle, acromion, and spine of scapula A; Elevates, adducts, depresses scapula, rotates scapula upward
trapezius
coracobrachialis
deltoid
biceps brachii
o: transverse process of C1-4 I: superior vertebral border of scapula A: elevates scapula
latissimus dorsi
supraspinatus
levator scapulae
rhomboid minor
O: Spines of T2-T5 I: Vertebral border of scapula inferior to spine A; Elevates and adducts scapula and rotates it downward
rhomboid major
O: Spines of C7-T1 I: Vertebral border of scapula superior to spine A: elevates and adducts scapula and rotates it downward
pectoralis major
O: clavicle, sternum, coastal cartilages of 2-6 ribs I: greater tubercle and intertubercular sulcus of humerus a: adducts and medially rotates arm at shoulder, flees arm, part
O: spine of t7-L5, thoracolumbar fascia, iliac crest, lower 4 ribs I: intertubercular sulcus of humerus A: adducts and medially rotates arm at shoulder, extends arm; draws arm inferiorly and posteriorly
Deltoid
subscapularis
O: lateral third of clavicle, acromion and spine of scapula I: deltoid tuberosity of humerus A; abducts, flexes, and medially rotates arm arm at shoulder
O: subscapular fossa of scapula I: lesser tubercle of humerus A: medially rotates arm at shoulder only
O: supraspinatus fossa of scapula I: greater tubercle of humerus A: Abducts arm at shoulder only, assists deltoid
O: infraspinous fossa of scapula I: greater tubercle of humerus A: laterally rotates and adducts arm at shoulder
O: inferior angle of scapula I: intertubercular sulcus of humerus A; adducts and medially rotates arm at shoulder; extends arm; draws arm inferiorly and posteriorly
O: lateral border of scapula I: greater tubercle of humerus A: laterally rotates and adducts arm at shoulder
O: Coracoid process of scapula I: greater tubercle of humerus A; flexes and adducts arm
coracobrachialis
O: Supraglenoid tubercle of scapula (long head) coracoid process (sht head) I: Radial tuberosity and bicipial aponeurosis A: Flexes arm, flexes and supinates forearm
Latissimus Dorsi
brachialis
brachioradialis
O: Distal ant. surface of humerus I: ulna tuberosity and coronoid process A: major flexor of forearm
triceps brachii
O: Lateral border of distal humerus I: Superior to styloid process of radius A: flex forearm, supinates and pronates forearm to neutral position
O: infraglenoid tubercle of scapula, medial and lateral surfaces of humerus I: olecranon process A: extends forearm and arm
O: C5-C6 Distribution: deltoid, teres minor injury: surgical neck of humerus fracture paralysis to muscles innervated by it (deltoid muscle), results in reduction of shoulder abduction
Median
Axillary
Ulnar
Dorsal scapular
O: C5-C7 Distribution: flexors: coracobrachialis, biceps brachii, brachialis
musculocutaneous
thoracordorsal
suprascapular
O: C5-C8, T1 Distribution: all extensor muscles and brachioradialis injury: wrist drop
median
ulnar
radial
dorsal scapular
O: C5-C8, T1 Distribution: flexors of forearm, except flexor carpi, ulnaris, and ulnar half of flexor digitorum profundus Injury: median nerve palsy- numbness, tingling, pain in palm and fingers
axillary
O: C8-Tl Distribution: flexor carpi ulnaris and part of flexor digitorum profundus, most hand muscles injury: clawhand-inability to adduct or abduct 4 fingers (not thumb)
uklnar
Distribution: levator scapulae, rhomboid major and minor
long thoracic
Distribution: anterior serratus injury: winged scapula-paralysis of serratus anterior
distribution: supraspinatus and infraspinatus
distribution: latissimus dorsi
thoracodorsal
distribution: subscapularis
upper subscapular
lower subscapular
lateral pectoral
distribution: subscapularis, teres major
upper scapular
lower scapular
dorsal scapular
distribution pectoralis major
medial pectoral
distribution: pectoralis major, minor
medial pectoralis
