Muscle Chart Flashcards by Anthony Martella

Pectoralis Major

Chest

Proximal: clavicle, sternum, costal cartilages of upper ribs
Distal: Lip of intertubercular sulcus
Innervation: Medial and lateral pectoral nerves
Action: adducts/medially rotates arm (also aids in flexion and extension of the humerus)

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Pectoralis Minor

Chest

Proximal: Ribs near costal cartilage
Distal: Coracoid Process
Innervation: medial pectoral nerve
Action: Stabilizes the scapula

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Subclavius

Proximal: first rib
Distal: clavicle
Innervation: Nerve to subclavius
Action: anchors/depresses clavicle

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Serratus Anterior

Chest

Proximal: lateral surface of ribs
distal: medial border of scapula
Innervation: long thoracic nerve
Action: protracts scapula/holds it agains the thoracic wall

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Deltoid

Shoulder

Prox: clavicle, acromion, spine of scapular
Distal: deltoid tuberosity
Innervation: axillary nerve
Action: (anterior fibers): flex/medially rotate arm
(Middle fibers): abduct arm
(Posterior fibers): extend/laterally rotate arm

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Infraspinatus

Shoulder

Prox: infraspinous fossa
Distal: greater tubercle of humerus
Innervation: suprascapular nerve
Action: laterally rotates the arm

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Supraspinatus

Shoulder

Prox: supraspinous fossa
Distal: Greater tubercle of the humerus
Innervation: suprascapular nerve
Action: initiates arm abduction

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Teres Minor

Shoulder

Prox: Lateral border of scapula
Distal: greater tubercle of humerus
Innervation: axillary nerve
Action: laterally rotates arm

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Teres Major

Shoulder

Prox: inferior angle of scapula
Distal: Lip of intertubercular sulcus
Innervation: lower subscapular nerve
Action: adducts/medially rotates the arm

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Subscapularis

Shoulder

Prox: subscapular fossa
distal: lesser tubercle of humerus
Innervation: upper and lower subscapular nerves
Actions: medially rotates the arm

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Biceps Brachii

Arm

Prox: (short head): coracoid process; (long head): supraglenoid tubercle
Distal: radial tuberosity and bicipital aponeurosis
Innervation: musculocutaneous nerve
Action: flexes and supinates forearm

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Coracobrachialis

Arm

Prox: coracoid process
distal: midshaft of humerus
Innervation: musculocutaneous nerve
Action: (weakly) flexes and adducts arm

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Brachialis

Arm

Prox: Distal humeral shaft
Distal: coronoid process of the ulna
Innervation: musculocutaneous nerve (a little contribution from radial)
Action: flexes forearm

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Triceps Brachii

Arm

Prox: (long head): infraglenoid tubercle; (lateral and medial heads): shaft of humerus
Distal: olecranon process
Innervation: radial nerve
Action: extends forearm

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Anconeus

Arm

Prox: lateral epicondyle of the humerus
Distal: proximal ulna
Innervation: radial nerve
Action: (weakly) extends forearm

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Pronator Teres

Forearm

Prox: coronoid process and medial epicondyle
Distal: radial shaft
Innervation: median nerve
Action: pronates/flexes forearm

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Flexor Carpi Radialis

Forearm

Prox: medial epicondyle of humerus
Distal: 2nd metacarpal
Innervation: median nerve
Action: flexes/abducts hand

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Palmaris Longus

Forearm

Prox: Medial epicondyle of humerus
Distal: Flexor Retinaculum and Palmar aponeurosis
Innervation: Median Nerve
Action: flexes hand/tenses palmar aponeurosis

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Flexor Carpi Ulnaris

Forearm

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Prox: Medial spondylitis of humerus and olecranon process
Distal: Pisiform, hook of hamate and 5th metacarpal
Innervation: Ulnar nerve
Action: flexes/adducts hand

Flexor Digitorum Superficialis

Forearm

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Prox: Medial epicondyle of humerus and proximal radius
Distal: middle phalanges of digits 2-5
Innervation: median nerve
Action: flexes PIP and MP joints of digits 2-5

Flexor Digitorum Profundus

Forearm

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Prox: proximal and middle ulna
Distal: distal phalanges of digits 2-5
Innervation: Ulnar nerve (medial half) and Median nerve (lateral half)
Action: Flexes DIP of digits 2-5

Flexor Pollicis Longus

Forearm

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Prox: radial shaft
Distal: distal phalanx of thumb
Innervation: median nerve
Action: flexes thumb

Pronator Quadratus

Forearm

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Prox: distal ulna
Distal: distal readius
Innervation: median nerve
Action: pronates forearm

Brachioradialis

Forearm

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Prox: Supraepicondylar ridge of humerus
Distal: distal radius
Innervation: radial nerve
Action: flexes forearm

Extensor Carpi Radialis Longus | Forearm

Prox: Lateral supraepicondylar ridge of humerus Distal: 2nd metacarpal Innervation: radial nerve Action: extends/abducts hand

Extensor carpi radialis brevis | Forearm

Prox: lateral epicondyle of humerus Distal: 3rd metacarpal Innervation: radial nerve Action: extends/abducts hand

Extensor Digitorum | Forearm

Prox: lateral epicondyle of humerus Distal: extensor expansion of digits 2-5 Innervation: radial nerve Action: extends MP and IP joints of digits 2-5

Extensor digiti minimi | Forearm

Prox: lateral epicondyle of humerus Distal: extensor expansion of digit 5 Innervation: radial nerve Action: extends MP and IP joints of digit 5

Extensor Carpi Ulnaris | Forearm

Prox: lateral epicondyle of humerus and proximal ulna Distal: 5th metacarpal Innervation: radial nerve Action: extends/adducts hand

Supinator | Forearm

Prox: lateral epicondyle of humerus Distal: proximal radius Innervation: radial nerve Action: supinates forearm

Extensor Indices | Forearm

Prox: distal ulna Distal: extensor expansion of digit 2 Innervation: radial nerve Action: extends digit 2

Abductor pollicis longus | Forearm

Prox: proximal ulna and radius Distal: 1st metacarpal Innervation: radial nerve Action: Abducts thumb

Extensor pollicis longus | Forearm

Prox: midshaft of ulna Distal: distal phalanx of thumb Innervation: radial nerve Action: extends thumb

Extensor Pollicis brevis | Forearm

prox: distal radius Distal: proximal phalanx of thumb Innervation: radial nerve Action: extends thumb

Opponens Pollicis | Hand

Prox: flexor retinaculum and carpal bones Distal: 1st metacarpal Innervation: recurrent branch of median nerve Action: opposes thumb

Abductor Pollicis Brevis | Hand

Prox: flexor retinaculum and carpal bones Distal: proximal phalanx of thumb Innervation: recurrent branch of median nerve Action: abducts thumb

Flexor Pollicis Brevis | Hand

Prox: flexor retinaculum and carpal bones Distal: proximal phalanx of thumb Innervation: recurrent branch of median nerve Action: flexes thumb

Adductor Pollicis | Hand

Prox: (oblique head): 2nd and 3rd metacarpal and adjacent carpal bones; (Transverse head): 3rd metacarpal Distal: proximal phalanx of thumb Innervation: ulnar nerve Action: adducts thumb

Adductor Digiti Minimi | Hand

Prox: pisiform Distal: proximal phalanx of 5th digit Innervation: ulnar nerve Action: abducts 5th digit

Flexor Digiti Minimi | Hand

Prox: hook of hamate Distal: proximal phalanx of 5th digit Innervation: ulnar nerve Action: flexes 5th digit

Opponens Digiti | Hand

Prox: hook of hamate Distal: 5th metacarpal Innervation: ulnar nerve Action: opposes 5th digit

Lumbricals 1+2 | Hand

Prox: lateral two tendons of FDP Distal: extensor expansion of digits 2+3 Innervation: median nerve Action: Flex MP joint and Extend IP joint

Lumbricals 3+4 | Hand

Prox: Median three tendons of FDP distal: extensor expansion of digits 4+5 Innervation: ulnar nerve Action: flex MP join, extend IP joint

``` Dorsal Interossei (4) (Hand) ```

prox: adjacent sides of metacarpals Distal: proximal phalanges and extensor expansions Innervation: ulnar nerve Action: abducts digits 2-4; assists lumbricals

``` Palmar Interossei (3) (Hand) ```

Prox: palmar surface of metacarpals 2,4,5 Distal: proximal phalanges and extensor expansions Innervation: ulnar nerve Actions: adducts digits 2,4,5; assists lumbricals

Muscle Chart Flashcards

(45 cards)