Gross I Practical I

AOIN

deltoid origins

anterior/clavicular portion- clavicle

middle/acromial portion- acromion process of scapula

posterior portion- spinous

deltoid insertion

deltoid tuberosity on humerus

deltoid actions

anterior portion- flexes & medially rotates arm

middle portion- abducts arm

posterior portion- extends & laterally rotates arm

nerve supply to deltoid

axillary nerve

supraspinatus origin

supraspinous fossa of scapula

supraspinatus insertion

greater tuberosity of humerus

supraspinatus actions

initiates abduction of arm, helps laterally rotate humerus, helps stabilize shoulder joint

supraspinatus nerve supply

suprascapular nerve

infraspinatus origin

infraspinous fossa

infraspinatus insertion

greater tubercle of humerus

infraspinatus actions

laterally rotates humerus, stabilizes shoulder joint

nerve supply to infraspinatus

suprascapular nerve

subscapularis origin

subscapular fossa of scapula

subscapularis insertion

lesser tuberosity of humerus

subscapularis actions

medially rotates humerus, stabilizes shoulder joint

subscapularis nerve supply

upper and lower subscapular nerves

teres major origin

inferior angle of scapula

teres major insertion

lesser tuberosity of humerus

teres major actions

adducts humerus, stabilizes shoulder joint, medially rotates humerus

teres major nerve supply

lower subscapular nerve

teres minor origin

axillary border of scapula

teres minor insertion

greater tuberosity of humerus

teres minor actions

laterally rotates humerus, stabilizes shoulder joint

nerve supply in the teres minor

axillary nerve

biceps brachii origins

short head- coracoid process of scapula

long head- supraglenoid tubercle of scapula

biceps brachii insertion

tuberosity of radius, shaft of ulna

biceps brachii actions

flexion of forearm, supinates the radius

biceps brachii nerve supply

musculocutaneous nerve

coracobrachialis origin

coracoid process of scapula

coracobrachialis insertion

shaft of humerus

coracobrachialis actions

flexion and weak adduction of arm at shoulder joint, stabilizes shoulder joint

coracobrachialis nerve supply

musculocutaneous nerve

brachialis origin

shaft of humerus

brachialis insertion

ulnar tuberosity and coronoid process of ulna

brachialis action

flexes forearm

brachialis nerve supply

musculocutaneous nerve

triceps brachii origins

long head- infraglenoid tubercle of scapula

lateral head- haft of humerus

medial head- shaft of humerus

triceps brachii insertion

olecranon process of ulna

triceps brachii action

extension of forearm

triceps brachii nerve supply

radial nerve

pronator teres origins

medial epicondyle of humerus, coronoid process of ulna

pronator teres insertion

pronator ridge of radius

pronator teres actions

pronates forearm at superior radio-ulnarr joint, assists flexion at elbow joint

pronator teres nerve supply

median nerve

flexor carpi radialis origin

medial epicondyle of humerus

flexor carpi radialis insertion

2nd metacarpal w/small slip to 3rd metacarpal

flexor carpi radialis actions

equal prime mover for flexion of hand at wrist joint, assists in abduction of hand

flexor carpi radialis nerve supply

median nerve

palmaris longus origin

medial epicondyle of humerus

palmaris longus insertion

palmar aponeurosis

palmaris longus actions

helps flex hand, tightens palmar aponeurosis of palm/helps with palmar grip

palmaris longus nerve supply

median nerve

flexor carpi ulnaris origin

medial epicondyle of humerus, olecranon process of ulna

flexor carpi ulnaris insertion

pisiform, hamate, 5th metacarpal

flexor carpi ulnaris

equal prime mover for flexion of hand at wrist joint, adducts hand

flexor carpi ulnaris nerve supply

ulnar nerve

flexor digitorum superficialis origin

shaft of radius, medial epicondyle of humerus

flexor digitorum superficialis insertion

middle phalanges of digits 2-5

flexor digitorum superficialis actions

flexes PI joints of digits 2-5, helps flex hand

flexor digitorum superficialis nerve supply

median nerve

flexor digitorum profundus origin

interosseous membrane on shaft of ulna

flexor digitorum profundus insertion

distal phalanges of digits 2-5

flexor digitorum profundus actions

flexes DIP joints of digits 2-5, helps flex hand

flexor digitorum profundus nerve supply

ulnar and median nerves

flexor pollicis longus origin

interosseous membrane on shaft of radiua

flexor pollicis longus insertion

distal phalanx of digit 1

flexor pollicis longus actions

flexes thumb at IP joint

flexor pollicis longus nerve supply

median nerve

pronator quadratus origin

distal anterior shaft of ulna

pronator quadratus insertion

distal anterior shaft of radius

pronator quadratus actions

pronation of forearm at inferior radial-ulnar joint, helps stabilize the inferior-radial-ulnar joint

pronator quadratus nerve supply

median nerve

brachioradialis origin

lateral supracondylar ridge of humerus

brachioradialis insertion

styloid process of radius

brachioradialis actions

helps flex forearm, pronates and supinates the arm

brachioradialis nerve supply

radial nerve

extensor carpi radialis longus origin

lateral epicondyle of humerus

extensor carpi radialis longus insertion

2nd metacarpal

extensor carpi radialis longus actions

extend the hand, abduct the hand

extensor carpi radialis longus nerve supply

radial nerve

extensor carpi radialis brevis origin

lateral epicondyle of humerus

extensor carpi radialis brevis insertion

3rd metacarpal

extensor carpi radialis brevis actions

extend the hand, abduct the hand

extensor carpi radialis brevis nerve supply

radial nerve

extensor digitorum origin

lateral epicondyle of humerus

extensor digitorum insertion

middle phalanx of digits 2-5

extensor digitorum actions

extends digits 2-5, extend hand

extensor digitorum nerve supply

radial nerve

extensor digiti minimi origin

lateral epicondyle of humerus

extensor digiti minimi insertion

proximal phalanx of 5th digit

extensor digiti minimi action

extend digit 5

extensor digiti minimi nerve supply

radial nerve

extensor capi ulnaris origin

shaft of ulna, lateral epicondyle of humerus

extensor carpi ulnaris insertion

5th metacarpal

extensor carpi ulnaris actions

extend hand, helps adduct hand

extensor carpi ulnaris nerve supply

radial nerve

supinator origin

lateral epicondyle of humerus, supinator crest of ulna

supinator insertion

shaft of radius

supinator actions

supinates forearm

supinator nerve supply

radial nerve