Upper Limb Muscles Flashcards
Supraspinatus
O = supraspinatus fossa
I = superior facet of humerus GT
I = suprascapular nerve
Infraspinatus
O = infraspinatus fossa
I = middle facet of humerus GT
I = suprascapular nerve
Teres minor
O = mid lateral scapular border
I = lesser tubercle of humerus
I = axillary nerve
Subscapularis
O = subscapular fossa on anterior surface of scapula
I = lesser tubercle of humerus
I = upper and lower subscapular nerves
Deltoid
O = lateral 1/3rd of clavicle, acromion, spine of scapula
I = deltoid tuberosity of humerus
I = axillary nerve
Pectoralis major
O = anterior surface of medial half of clavicle, sternum, and superior 6 costal cartilages
I = lateral lip of intertubercular sulcus of humerus
I = medial and lateral pectoral nerves
Pectoralis minor
O = 3rd to 5th ribs near medial border of scapula
I = coracoid process
I = medial pectoral nerve
Serratus anterior
O = lateral parts of ribs 1-8
I = anterior surface of medial border of scapula
I = long thoracic nerve
Trapezius
O = medial 1/3rd of superior nuchal line, external occipital protuberance, spinous process C7-T12
I = lateral 1/3rd of clavicle, acromion, spine of scapula
I = spinal accessory nerve
Latissimus dorsi
O = spinous processes of T6-12, iliac crest
I = floor of intertubercular sulcus of humerus
I = thoracodorsal nerve
Biceps brachii
O = long head - supraglenoid tubercle, short head - coracoid
I = radial tuberosity
I = musculocutaneous
Coracobrachialis
O = tip of coracoid
I = middle 1/3rd of medial humeral surface
I = musculocutaneous
Brachialis
O = distal 1/2 of anterior humeral surface
I = coronoid process of ulna
I = musculocutaneous
Triceps brachii
O = long head - infraglenoid tubercle, lateral head - posterior surface of humerus, medial head - posterior surface of humerus
I = proximal end of olecranon
I = radial nerve
Anconeus
O = lateral epicondyle
I = lateral surface of olecranon
I = radial nerve
Pronator teres
O = ulnar head - coronoid, humeral head - medial epicondyle
I = lateral radius
I = median nerve
FCR
O = medial epicondyle
I = base of 2nd met
I = median nerve
Palmaris longus
O = medial epicondyle
I = flexor retinaculum
I = median nerve
FCU
O = medial epicondyle
I = pisiform, hook of hamamte
I = ulnar nerve
FDS
O = anterior surface of proximal ulna
I = middle phalanges of medial 4 digits
I = median nerve
FDP
O = anterior surface of ulna and IO membrane
I = base of distal phalanges of medial 4 digits
I = medial half - ulnar nerve, radial half - AIN
FPL
O = anterior surface of radius and IO membrane
I = base of distal phalanx of thumb
I = AIN
PQ
O = distal 1/4 anterior surface of ulna
I = distal 1/4 anterior surface of radius
I = AIN
Brachioradialis
O = supra-condylar ridge of humerus
I = lateral surface of distal radius
I = radial nerve
ECRL
O = lateral epicondyle
I = base of 2nd metacarpal
I = radial nerve
ECRB
O = lateral epicondyle
I = base of 3rd metacarpal
I = PIN
EDC
O = lateral epicondyle
I = extensor expansion of medial 4 digits
I = PIN
EDM
O = lateral epicondyle
I = extensor expansion of 5th digit
I = PIN
ECU
O = lateral epicondyle
I = dorsal aspect of base of 5th metacarpal
I = PIN
Supinator
O = lateral epicondyle, radial collateral ligaments
I = proximal 1/3rd of radius laterally
I = PIN
EIP
O = posterior surface of distal 1/3rd of ulna
I = extensor expansion of 2nd digit
I = PIN
APL
O = posterior surface of proximal half of radius and ulna
I = base of 1st metacarpal
I = PIN
EPL
O = posterior surface of proximal ulna and IO membrane
I = dorsal aspect of base of distal phalanx of thumb
I = PIN
EPB
O = posterior surface of distal 1/3rd of radius and IO membrane
I = dorsal aspect of base of proximal phalanx of thumb
I = PIN
Opponens pollicis
O = tubercle of trapezium
I = lateral margin of 1st metacarpal
I = recurrent branch of median nerve
Abductor pollicis brevis
O = scaphoid and trapezium tubercles
I = lateral side of proximal phalanx of thumb
I = recurrent branch of median nerve
Opponens digiti minimi
O = hook of hamate
I = medial margin of 5th metacarpal
I = ulnar nerve
Abductor digiti minimi
O = pisiform
I = base of proximal phalanx of 5th digit
I = ulnar nerve
Flexor digiti minimi brevis
O = hook of hamate
I = base of proximal phalanx of 5th digit
I = ulnar nerve
Lumbricals
O = tendon of FDP
I = extensor hood
I = lateral 2 - median nerve, medial 2 - ulnar nerve
I = flexes MCPs, extends IPs
Interossei
O = lateral and medial surfaces of the metacarpals
I = extensor hoods
I - ulnar nerve
