Muscles: Action, Origin, Insertion, Nerve Innervation Flashcards
Upper Trap: A, O, I, N
A: Scap elevation and upward rotation
O: Occipital bone, nuchal ligament on upper cervical processes
I: Outer 1/3 of clavicle & acromion process
N: Spinal accessory C3-4
Middle Trap: A, O, I, N
A: Scapular retraction
O: Spinous processes of C7- T3
I: Spine of scapula
N: Spinal accessory C3-4
Lower Trap: A, O, I, N
A: Scapular depression and upward rotation
O: Spinous processes of middle & lower thoracic vertebrae
I: Base of the scapular spine
N: Spinal accessory C3-4
Levator Scapula: A, O, I, N
A: Scapular elevation & downward rotation
O: Transverse process of C1-4
I: Superior angle of scapula
N: Cervical C3-4 & Dorsal scapular C4-5
Rhomboid Minor: A, O, I, N
A: Scapular retraction, elevation, & downward rotation
O: Spinous processes of C7-T1
I: Vertebral border of scapula b/t the spine & inferior angle
N: Dorsal scapular C4-5
Rhomboid Major: A, O, I, N
A: Scapular retraction, elevation, & downward rotation
O: Spinous processes of T2-T5
I: Medial border of scapula b/t the spine & inferior angle
N: Dorsal scapular C4-5
Serratus Anterior: A, O, I, N
A: Scapular Protraction & upward rotation
O: Lateral surface of upper 8 ribs
I: Anterior surface of vertebral border of the scapula
N: Long thoracic nerve C5-7
Pectoralis Minor: A, O, I, N
A: Scapular depression, protraction, downward rotation & tilt
O: anterior surface of 3rd-5th ribs
I: Coracoid process of the scapula
N: Medial pectoral nerve C8- T1
Pectoralis Major: A, O, I, N
A: All fibers- GH joint ADD & IR
Upper fibers- GH joint flexion & horizontal ADD
Lower fibers- GH joint Extension
O: Clavicular portion: Medial half of clavicle
Sternal portion: Sternum, costal cartilage of 1-6 ribs
I: Crest of greater tubercle
N: Upper fibers- C5-7/ Lower fibers C6-T1
Anterior Deltoid: A, O, I, N
A: Shoulder ABD, Flex, IR, Horz. ADD
O: Lateral 1/3 of clavicle
I: Deltoid tuberosity
N: Axillary nerve C5-6
Middle Deltoid: A, O, I, N
A: Shoulder ABD
O: Acromion process
I: Deltoid tuberosity
N: Axillary nerve C5-6
Posterior Deltoid: A, O, I, N
A: Shoulder ABD, EXT, ER, Horz ABD & hyperextension
O: Spine of scapula
I: Deltoid tuberosity
N: Axillary nerve C5-6
Supraspinatus: A, O, I, N
A: Shoulder ABD
O: Suprspinous fossa of the scapula
I: Greater tubercle of the humerus
N: Suprascapular nerve C5-6
Latissimus Dorsi: A, O, I, N
A: Shoulder EXT, ADD, IR & hyperextension
O: Spinous processes of T7-L5, post. surface of sacrum, iliac crest & lower 3 ribs
I: Medial portion of bicipital groove
N: Thoracodorsal nerve C6-8
Teres Major: A, O, I, N
A: Shoulder EXT, ADD, IR
O: Axillary border of scapula near the inferior angle
I: Crest below lesser tubercle
N: Lower subscapular nerve C5-7
Infraspinatus: A, O, I, N
A: Shoulder ER, Horz ABD
O: Infraspinous fossa of scapula
I: Greater tubercle of humerus
N: Suprascapular nerve C5-6
Teres Minor: A, O, I, N
A: Shoulder ER, Horz ABD
O: Axillary border of scapula
I: Greater tubercle of humerus
N: Axillary nerve C5-6
Subscapularis: A, O, I, N
A: Shoulder IR
O: Subscapular fossa of scapula
I: Lesser tubercle of humerus
N: Upper & lower subscapular nerve C5-6
Coracobrachialis: A, O, I, N
A: Stabilizes the shoulder joint
O: Coracoid process
I: Medial surface of the humerus near the midpoint
N: Musculocutaneous nerve C6-7
Brachialis: A, O, I, N
A: Elbow flexion
O: Anterior surface of distal half of humerus
I: Coronoid process & ulnar tuberosity of the ulna
N: Musculocutaneous nerve C5-6
Biceps brachii: A, O, I, N
A: Elbow flexion, forearm supination O: Long head- supraglenoid tubercle of scapula Short head- coracoid process of scapula I: Radial tuberosity of radius N: Musculocutaneous nerve C5-6
Brachioradialis: A, O, I, N
A: Elbow flexion
O: Lateral supracondylar ridge
I: Styloid process of the radius
N: Radial nerve C5-6
Triceps Muscle: A, O, I, N
A: Elbow extension
O: Long head- infraglenoid tubercle on the scapula
Lateral head- inferior to greater tubercle on posterior humerus
Medial head- posterior surface of humerus
I: Olecrannon process
N: Radial nerve C7-8
Anconeus: A, O, I, N
A: Assists in elbow extension
O: Lateral epicondyle of humerus
I: Later & inferior to olecrannon process of ulna
N: Radial nerve C7-8
Pronator Teres: A, O, I, N
A: Forearm pronation, assists in elbow flexion
O: Medial epicondyle of humerus & coronoid process of ulna
I: Lateral aspect of radius
N: Median nerve C6-7
Pronator Quadratus: A, O, I, N
A: Forearm pronation
O: Distal 1/4 of ulna
I: Distal 1/4 of radius
N: Median nerve C8-T1
Supinator: A, O, I, N
A: Forearm supination
O: Lateral epicondyle of humerus & adjacent ulna
I: Anterior surface of the proximal radius
N: Radial nerve C6
Flexor Carpi Ulnaris: A, O, I, N
A: Wrist flexion, ulnar dev.
O: Medial epicondyle of humerus
I: Pisiform & base of 5th metacarpal
N: Ulnar nerve C8-T1
Flexor Carpi Radialis: A, O, I, N
A: Wrist flexion, radial dev
O: Medial epicondyle of humerus
I: Base of 2nd -3rd metacarpals
N: Median nerve C6-7
Palmaris Longus: A, O, I, N
A: Assist in wrist flexion
O: medial epicondyle of humerus
I: Palmar fascia
N: Median nerve C6-7
Extensor Carpi Radialis Longus: A, O, I, N
A: Wrist ext and radial dev
O: Supracondylar ridge of humerus
I: Base of 2nd metacarpal
N: Radial nerve C6-7
Extensor Carpi Radialis Brevis: A, O, I, N
A: Wrist ext
O: Lateral epicondyle of humerus
I: Base of 3rd metacarpal
N: Radial nerve C6-7:
Extensor Carpi ulnaris: A, O, I, N
A: Wrist ext, ulnar dev
O: Lateral epicondyle of humerus
I: Base of 5th metatarsal
N: Radial nerve C6-8
Abductor Pollicis Longus: A, O, I, N
A: Thumb ABD, EXT/ Wrist radial deviation
O: Posterior surface of radius and ulna
I: Base of 1st metacarpal
N: Radial C6-8
Extensor Pollicis Brevis: A, O, I, N
A: Thumb ext/ Wrist radial deviation
O: Posterior surface of the radius & interossesous membrane
I: Base of proximal phalanx of thumb
N: Radial C6-8
Extensor Pollicis Longus: A, O, I, N
A: Thumb ext/ Wrist radial deviation
O: Posterior surface of the radius & interossesous membrane
I: Base of proximal phalanx of thumb
N: Radial C6-8
Extensor Indicis: A, O, I, N
A: 2nd finger EXT & ADD
O: Posterior surface of distal shaft of ulna & interosseus membraine
I: Tendon of the extensor digitorum at the level of the 2nd metacarpal
N: Radial C6-8
Flexor pollicis brevis: A, O, I, N
A: Thumb flex/ Assist in opposition O: Superficial head- flexor retinaculum Deep head- Trapezium, trapeziod, capitate I: Base of proximal phalanx of thumb N: Superficial head Median C6-8, T1 Deep head Ulnar C8 & T1
Flexor Digiti Minimi Brevis: A, O, I, N
A: Flex the 5th finger
O: Hook of hamate & flexor retinaculum
I: Base of proximal phalanx of 5th finger, palmar surface
N: Ulnar C7-8, T1
Flexor Pollicis Longus: A, O, I, N
A: Thumb flex/ Assist in wrist flexion
O: Anterior surface of radius & interosseous membrane
I: Base of distal phalanx of thumb
N: Median C6-8, T1
Flexor Digitorum Profundus: A, O, I, N
A: Flex 2nd-5th fingers
O: Anterior & medial surfaces of proximal 3/4 of ulna
I: Bases of distal phalanges, palmar surface of 2nd- 5th fingers
N: 2nd & 3rd Median C7-8, T1
4th & 5th Ulnar C7-8, T1
Flexor Digitorum Superficialis: A, O, I, N
A: Flex 2nd- 5th fingers & Wrist flexion
O: Common flexor tendon from medial epicondyle of humerus
I: Sides of middle phalanges 2nd- 5th fingers
N: Median C7-8, T1
Abductor Pollicis Brevis: A, O, I, N
A: Abduct thumb/ Opposition
O: Flexor retinaculum, trapezium, & scaphoid tubercles
I: Base of proximal phalanx of thumb
N: Median C6-8, T1
