general anatomy muscles

what are the rotator cuff muscles

supraspinatus

infraspinatus

teres minor

subscapularis

what innervates the supraspinatus

suprascapular n

what is the origin of the supraspinatus

superior scapula (supraspinatus fossa)

what is the insertion of the supraspinatus

greater tuberosity of the humerus (superior facet)

what is the action if the supraspinatus

abduct the arm 0-15 degrees

what innervates the infraspinatus

suprascapular n

what is the origin of the infraspinatus

inferior scapula (infrapsinatus fossa)

what is the insertion of the infraspinatus

greater tuberosity of the humerus (middle facet)

what is the action of the infraspinatus

externally rotate the arm

what innervates the teres minor

axillary n

what is the origin of the teres minor

posterolateral scapula

what is the insertion of the teres minor

greater tuberosity of the humerus

what is the action of the teres minor

externally rotate the humerus

adduct humerus

what innervates the subscapularis

upper and lower subscapular n

what is the origin of the subscapularis

anterior scapula

what is the insertion of the subscapularis

lesser tuberosity of the humerus

what is the action of the subscapularis

internally rotate arm

what innervates latissimus dorsi

thoracodorsal n

what is the origin(s) of the latissimus dorsi

SP T6-T12

thoracolumbar fascia

iliac crest

inferior 4 ribs

what is the insertion of the latissimus dorsi

floor of intertubercular groove

what is the action of the latissimus dorsi

extend humerus

adduct humerus

internally rotate humerus

what innervates the serratus anterior

long thoracic n

what is the origin of the serratus anterior

external surface ribs 1-8

what is the insertion of the serratus anterior

superior angle of scapula

medial border of scapula

inferior angle of scapula

what is the action of the serratus anterior

protract and abduct scapula

what innervates the rhomboid minor

dorsal scapular n

what is the origin of the rhomboid minor

SP C7-T1

what is the insertion of the rhomboid minor

medial border of scapula

what is the action of rhomboid minor

adduct scapula

retract scapula

what innervates rhomboid major

dorsal scapular n

what is the origin of rhomboid major

sp T2-T5

what is the insertion of rhomboid major

medial border of scapula

what is the action of rhomboid major

adduct scapula

retract scapula

what innervates the deltoid

axillary n

what is the origin of the deltoid

lateral 1/3 of clavicle

acromion

spine of scapula

what is the insertion of the deltoid

deltoid tuberosity of humerus

what is the action of the deltoid

abduct, adduct, flex, extend and internally rotate humerus

what innervates the levator scapulae

dorsal scapular n

what is the origin of the levator scapulae

tp C1-C4

what is the insertion of levator scapulae

superior and medial border of scapula

what is the action of the levator scapulae

elevate scapula

what innervates the trapezius

spinal accessory C3 and C4 ventral rami

what is the origin of the trapezius

medial superior nuchal line

EOP

ligamentum nuchae

sp C7-T12

what is the insertion of the trapezius

lateral 1/3 of clavicle

acromion

spine of scapula

what is the action of the trapezius

elevates, depresses, and retracts scapula

what innervates the subclavius

subclavian n

what is the origin of the subclavius

first rib

what is the insertion of the subclavius

groove for subclavius on clavicle

what is the action of the subclavius

depress the clavicle

what innervates the pec major

medial and lateral pectoral n

how many heads does the pec have

3

what are the heads of the pec major

clavicular

sternal

abdominal

what is the origin of the pec majors clavicular head

medial 1/3 of clavicle

what is the origin of the pec majors sternal head

manubrium and body of sternum

what is the origin of the pec majors abdominal head

costal cartilages ribs 2-6

what is the insertion of pec major

lateral lip of intertubercular groove

what is the action of the pec major

flex, adduct, and internally rotate humerus

what is the innervation of the pec minor

medial pectoral n

what is the origin of the pec minor

ribs 3-5

what is the insertion of the pec minor

coracoid process of scapula

what is the action of the pec minor

depress arm

what is the innervation of the teres major

lower subscapular n

what is the origin of teres major

inferior angle and lateral border of scapula

what is the insertion of teres major

medial lip of intertubecular groove

what is the action of teres major

extend, adduct and internally rotate arm

what innervates the biceps

musculocutaneous n

what is the origin of the long head of the biceps

supraglenoid tubercle

what is the origin of the short head of the biceps

coracoid process of scapula

what is the insertion of the biceps

radial tuberosity

what is the action of the biceps

flex and supinate forearm

what innervates the coracobrachialis

musculocutaneous n

what is the origin of the coracobrachialis

coracoid process of scapula

what is the insertion of the coracobrachialis

medial humerus

what is the action of the coracobrachialis

adduct and flex forearm

what innervates the brachialis

musculocutaneous n

what is the origin of the brachialis

distal anterior humerus

what is the insertion of the brachialis

coronoid process of ulna

what is the action of the brachialis

flex forearm

what innervates the triceps

radial n

how many heads of the triceps are there

3

what are the heads of the triceps

long

medial

lateral

what is the origin of the long head of the triceps

infraglenoid tubercle

what is the origin of the lateral head of the triceps

posterolateral aspect of the humerus (above radial groove)

what is the origin of the medial head of the biceps

posterolateral aspect of the humerus (below radial groove)

what is the insertion of the triceps

olecranon of ulna

what is the action of the triceps

extend forearm

what innervates the pronator teres

median n

what is the origin of the pronator teres

medial epicondyle of humerus

coronoid process of ulna

what is the insertion of the pronator teres

middle of lateral surface of radius

what is the action of pronator teres

pronates forearm

what innervates flexor carpi ulnaris

ulnar n

how many heads does the flexor carpi ulnaris have

2

what are the heads of the flexor carpi ulnaris

humeral and ulnar

what is the origin of the humeral head of the flexor carpi ulnaris

medial epicondyle of the humerus

what is the origin of the ulnar head of the flexor carpi ulnaris

olecranon and posterior border of the ulna

what is the insertion of the flexor carpi ulnaris

pisiform

hook of hamate

base of 5th MCP

what is the action of the flexor carpi ulnaris

flex and adducts wrist and hand

flexes forearm

what innervates the palmaris longus

median n

what is the origin of the palmaris longus

medial epicondyle of the humerus

what is the insertion of the palmaris longus

palmar aponeurosis