Muscles: Origins, Insertions & Innervations Flashcards
Upper Trapezius
Origin: external occipital protuberance
Insertion: lateral 1/3 of the
Serratus Anterior
Origin: ribs 1-8
Insertion: anterior surface of vertebral border of scapula
Rhomboid minor
Origin: Spinous Process’s C7-T1
Insertion: root of spine of scapula
Rhomboid major
Origin: spinous process’s T2-T5
Insertion: medial border of scapula from root of spine to inferior angle
Supraspinatus
Origin: supraspinous fossa of scapula
Insertion: greater tubercle of humerus
Innervation: supra-scapular nerve
Anterior deltoid
Origin: lateral 1/3 of clavicle
Insertion: deltoid tuberosity
Innervation: axillary nerve
Posterior deltoid
Origin: spine of scapula
Insertion: deltoid tuberosity
Innervation: axillary nerve
Middle deltoid:
Origin: acromion process of scapula
Insertion: deltoid tuberosity
Innervation: axillary nerve
Teres major
Origin: inferior angle of scapula
Insertion: medial lip of bicipital groove
Innervation: inferior subscapular nerve
Infraspinatus
Origin: infraspinous fossa of scapula
Insertion: greater tubercle
Innervation: suprascapular nerve
Biceps brachii short head
origin: coracoid process of scapula
insertion: radial tuberosity
innervation: musculotcutaneous nerve (C5, C6)
biceps brachii long head
origin: supraglenoid tubercle of scapula
insertion: radial tuberosity
innervation: musculotcutaneous nerve (C5, C6)
triceps brachii long head
origin: infraglenoid tubercle of scapula
insertion: olecranon process of ulna
triceps brachii lateral head
origin: proximal, posterior-lateral surface of humerus
insertion: olecranon process of ulna
innervation: radial nerve (C7, C8)
triceps brachii medial head
origin: distal posterior surface of humerus
insertion: olecranon process of humerus
innervation: radial nerve (C7, C8)
pronator teres
origin humeral head: medial aspect of humerus proximal to medial epicondyle
origing ulnar head: medial aspect of coronoid process of ulna
Insertion: middle of lateral surface of the radius
innervation: median nerve
Flexor carpi ulnaris
origin humeral head: medial epicondyle
origin ulnar head: olecranon process
insertion: pisiform, hammate, and base of 5th metacarpal
innervation: ulnar nerve
Flexor carpi radialis
origin: medial epicondyle
insertion: base of 2nd and 3rd metacarpal bones
innervation: median nerve
palmaris longus
origin: medial epicondyle
insertion: palmar aponeurosis & flexor reticulum
innervation: median nerve
Extensor carpi radialis longus:
origin: lateral supracondylar ridge of humerus
insertion: posterior surface of base of 2nd metacarpal
innervation: radial nerve
Extensor carpi radialis brevis
origin: lateral epicondyle of humerus
insertion: posterior surface of base of 3rd metacarpal
innervation: radial nerve
Extensor carpi ulnaris
origin: lateral epicondyle of humerus
insertion: base of 5th metacarpal
innervation: radial nerve
Lumbricals
origin: felxor digitorum profundus tendons
insertion: extensor expansion on radial side
innervation: 1 & 2: median
3 & 4: ulnar
Flexor Digitorum Superficialis
origin humeral head: medial epicondyle
origin ulnar head: coronoid process
origin radial head: proximal 1/2 anterior surface
insertion: sides of shaft of middle phalanges
innervation: median nerve
Flexor Digitorum Profundus
origin: interosseus membrane, 3/4 anterior and medial surfaces of ulna, medial aspects of coronoid process of ulna
insertion: palmer suface of base of distal phalanger 2-5
innervcation: median nerve digits 2-3
ulnar nerve digits 4-5
Extensor digitorum
origin: lateral epicondyle
insertion: extensor expansion digits 2-5
innervation: radial nerve
Extensor indicis
origin: posterolateral surface of middle of 1/3 of ulnav& ineterosseus membrane
insertion: extensor expansion of 2nd digit
innervation: radial nerve
Abductor Digiti minimi
origin: pisiform
insertion: base proximal phalanx of 5th digit
innervation: ulnar nerve
Dorsal interossei
origin: adjacent sides of shafts of metacarpals
insertion: extensor expansion
innervation: ulnar nerve
Palmar interossei
origin:
1st: 1st Palmar Interosseous:
Ulnar side of palmar surface of the shaft of the 2nd metacarpal bone
2nd Palmar Interosseous:
Radial side of palmar surface of the shaft of the 4th metacarpal bone
3rd Palmar Interosseous:
Radial side of palmar surface of the shaft of the 5th metacarpal bone
Insertion:1st Palmar Interosseous:
Extensor Expansion
Ulnar side of the base of the proximal phalanx the 2nd digit
2nd Palmar Interosseous:
Extensor Expansion
Radial side of the base of the proximal phalanx the 4th digit
3rd Palmar Interosseous:
Extensor Expansion
Radial side of the base of the proximal phalanx the 5th digit
innervation: ulnar nerve
Flexor pollicis brevis
origin lateral head: flexor retinaculum and trapezium
origin medial head: trapezoid and capitate, ulnar size of 1st metacarpal bone
insertion: radial side of base of proxima phalanx of thumb
Extensor pollicis brevis
origin: posterior surface of distal radius and interosseus membrane
insertion: base of posterior surface of distal phalanx of thumb
innervation: radial nerve
Extensor pollicis longus
origin: middle 1/3 of posterior ulna and interosseus membrane
insertion: base of posterior surface of distal phalanx of thumb
innervation: radial nerve
abductor pollcis longus
origin: Middle 1/3 posterior surface of radius and ulna, interosseous membrane
insertion: Radial side of the base of the 1st metacarpal
innervation: radial nerve
abductor pollicis brevis
origin: Flexor retinaculum, trapezium and scaphoid
insertion: Radial side of the base of the proximal phalanx of the thumb
innervation: median nerve
Adductor pollicis
Origin: Transverse Head: anterior surface of the 3rd metacarpal
Oblique Head: capitate and base of the 2nd and 3rd metacarpals
Insertion: Ulnar side of the base of the proximal phalanx of the thumb
Innervation: median nerve
flexor pollicis longus
Origin: Anterior surface of the middle of the shaft of radius and interosseous membrane
Insertion: Base of the anterior surface of the distal phalanx of the thumb
Innervation: Median Nerve
