Muscles of the Upper Extremity

Card Set Information

Author:
tbrownpt
ID:
79893
Filename:
Muscles of the Upper Extremity
Updated:
2011-04-16 12:59:36
Tags:
Muscles shoulder elbow hand
Folders:

Description:
muscle origin, insertion, action, innervation, blood supply of the muscles of the upper extremity
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user tbrownpt on FreezingBlue Flashcards. What would you like to do?


  1. Abductor Digiti Minimi
    • Origin
    • Pisiform

    • Insertion
    • Medial side of base of proximal phalanx of little finger

    • Action
    • Abducts little (5th) finger

    • Innervation
    • Deep branch of ulnar nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Ulnar artery
  2. Abductor Pollicis Brevis
    • Origin
    • Flexor retinaculum and tubercles of scaphoid and trapezium

    • Insertion
    • Lateral side of base of proximal phalanx of thumb

    • Action
    • Abducts thumb and helps oppose it

    • Innervation
    • Recurrent branch of median nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Superficial palmar branch of the radial artery
  3. Abductor Pollicis Longus
    • Origin
    • Posterior surfaces of ulna, radius and interosseous membrane

    • Insertion
    • Base of 1st metacarpal

    • Action
    • Abducts thumb and extends it at carpometacarpal joint

    • Innervation
    • Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve (C7, C8)

    • Arterial Supply
    • Posterior interosseous artery
  4. Adductor Pollicis
    • Origin
    • Oblique head: bases of 2nd and 3rd metacarpals, capitate, and adjacent carpals; Transverse head: anterior surface of body of 3rd metacarpal

    • Insertion
    • Medial side of base of proximal phalanx of thumb

    • Action
    • Draws 1st metacarpal laterally to oppose thumb toward center of palm and rotates it medially

    • Innervation
    • Deep branch of ulnar nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Deep palmar arterial arch
  5. Anconeus
    • Origin
    • Lateral epicondyle of humerus

    • Insertion
    • Lateral surface of olecranon and superior part of posterior surface of ulna

    • Action
    • Assists triceps in extending forearm; stabilizes elbow joint; abducts ulna during pronation

    • Innervation
    • Radial nerve (C7, C8 and T1) (C7, C8, T1)

    • Arterial Supply
    • Middle collateral branch of deep brachial artery; Recurrent interosseous artery
  6. Biceps Brachii
    • Origin
    • Short head: tip of coracoid process of scapula; Long head: supraglenoid tubercle of scapula

    • Insertion
    • Tuberosity of radius and fascia of forearm via bicipital aponeurosis

    • Action
    • Supinates forearm and, when it is supine, flexes forearm

    • Innervation
    • Musculocutaneous nerve (C5 and C6 ) (C5, C6)

    • Arterial Supply
    • Muscular branches of brachial artery
  7. Brachialis
    • Origin
    • Distal half of anterior surface of humerus

    • Insertion
    • Coronoid process and tuberosity of ulna

    • Action
    • Major flexor of forearm -- flexes forearm in all positions

    • Innervation
    • Musculocutaneous nerve (C5 and C6) (C5, C6)

    • Arterial Supply
    • Muscular branches of brachial artery, recurrent radial artery
  8. Brachioradialis
    • Origin
    • Proximal 2/3 of lateral supracondyle ridge of humerus

    • Insertion
    • Lateral surface of distal end of radius

    • Action
    • Flexes forearm

    • Innervation
    • Radial nerve (C5, C6 and C7) (C5, C6, C7)

    • Arterial Supply
    • Radial recurrent artery
  9. Coracobrachialis
    • Origin
    • Tip of coracoid process of scapula

    • Insertion
    • Middle third of medial surface of humerus

    • Action
    • Helps to flex and adduct arm

    • Innervation
    • Musculocutaneous nerve (C5, C6 and C7) (C5, C6, C7)

    • Arterial Supply
    • Muscular branches of brachial artery
  10. Deltoid
    • Origin
    • Lateral third of clavicle, acromion, and spine of scapula

    • Insertion
    • Deltoid tuberosity of humerus

    • Action
    • Anterior part: flexes and medially rotates arm; Middle part: abducts arm; Posterior part: extends and laterally rotates arm

    • Innervation
    • Axillary nerve (C5 and C6) (C5, C6)

    • Arterial Supply
    • Deltoid branch of thoracoacromial artery
  11. Extensor Carpi Radialis Brevis
    • Origin
    • Lateral epicondyle of humerus

    • Insertion
    • Base of 3rd metacarpal

    • Action
    • Extend and abduct hand at wrist joint

    • Innervation
    • Deep branch of radial nerve (C7 and C8) (C7, C8)

    • Arterial Supply
    • Radial artery
  12. Extensor Carpi Radialis Longus
    • Origin
    • Lateral supracondyle ridge of humerus

    • Insertion
    • Base of 2nd metacarpal

    • Action
    • Extend and abduct hand at wrist joint

    • Innervation
    • Radial nerve (C6 and C7) (C7, C6)

    • Arterial Supply
    • Radial artery
  13. Extensor Carpi Ulnaris
    • Origin
    • Lateral epicondyle of humerus and posterior border of ulna

    • Insertion
    • Base of 5th metacarpal

    • Action
    • Extends and adducts hand at wrist joint

    • Innervation
    • Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve (C7, C8)

    • Arterial Supply
    • Ulnar artery
  14. Extensor Digiti Minimi
    • Origin
    • Lateral epicondyle of humerus

    • Insertion
    • Extensor expansion of 5th digit

    • Action
    • Extends 5th digit at metacarpophalangeal and interphalangeal joints

    • Innervation
    • Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve (C7, C8)

    • Arterial Supply
    • Interosseous recurrent artery
  15. Extensor Digitorum
    • Origin
    • Lateral epicondyle of humerus

    • Insertion
    • Extensor expansions of medial four digits

    • Action
    • Extends medial four digits at metacarpophalangeal joints; Extends hand at wrist joint

    • Innervation
    • Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve (C7, C8)

    • Arterial Supply
    • Interosseous recurrent and posterior interosseous arteries
  16. Extensor Indicis
    • Origin
    • Posterior surface of ulna and interosseous membrane

    • Insertion
    • Extensor expansion of 2nd digit

    • Action
    • Extends 2nd digit and helps to extend hand

    • Innervation
    • Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve (C7, C8)

    • Arterial Supply
    • Posterior interosseous artery
  17. Extensor Pollicis Brevis
    • Origin
    • Posterior surfaces of radius and interosseous membrane

    • Insertion
    • Base of proximal phalanx of thumb

    • Action
    • Extends proximal phalanx of thumb at carpometacarpal joint

    • Innervation
    • Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve (C7, C8)

    • Arterial Supply
    • Posterior interosseous artery
  18. Extensor Pollicis Longus
    • Origin
    • Posterior surface of middle 1/3 of ulna and interosseous membrane

    • Insertion
    • Base of distal phalanx of thumb

    • Action
    • Extends distal phalanx of thumb at carpometacarpal and interphalangeal joints

    • Innervation
    • Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve (C7, C8)

    • Arterial Supply
    • Posterior interosseous artery
  19. Flexor Carpi Radialis
    • Origin
    • Medial epicondyle of humerus

    • Insertion
    • Base of 2nd metacarpal

    • Action
    • Flexes and abducts hand (at wrist)

    • Innervation
    • Median nerve (C6 and C7) (C6, C7)

    • Arterial Supply
    • Ulnar artery
  20. Flexor Carpi Ulnaris
    • Origin
    • Humeral head: medial epicondyle of humerus; Ulnar head: olecranon and posterior border of ulna

    • Insertion
    • Pisiform bone, hook of hamate bone, and 5th metacarpal bone

    • Action
    • Flexes and adducts hand (at wrist)

    • Innervation
    • Ulnar nerve (C7 and C8) (C7, C8)

    • Arterial Supply
    • Ulnar artery
  21. Flexor Digitorum Profundus
    • Origin
    • Proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane

    • Insertion
    • Base of the distal phalanx of digits 2 - 5

    • Action
    • Flexes distal phalanges at distal interphalangeal joints of medial four digits; assists with flexion of hand

    • Innervation
    • Medial part: ulnar nerve (C8 and T1); Lateral part: anterior interosseous branch of median nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Ulnar and anterior interosseous arteries
  22. Flexor Digiti Minimi Brevis
    • Origin
    • Hook of hamate and flexor retinaculum

    • Insertion
    • Medial side of base of proximal phalanx of little finger

    • Action
    • Flexes proximal phalanx of little (5th) finger

    • Innervation
    • Deep branch of ulnar nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Ulnar artery
  23. Flexor Pollicis Longus
    • Origin
    • Anterior surface of radius and adjacent interosseous membrane

    • Insertion
    • Base of distal phalanx of thumb

    • Action
    • Flexes phalanges of 1st digit (thumb)

    • Innervation
    • Anterior interosseous nerve from median nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Anterior interosseous artery
  24. Infraspinatus
    • Origin
    • Infraspinous fossa of scapula

    • Insertion
    • Middle facet on greater tuberosity of humerus

    • Action
    • Laterally rotate arm; helps to hold humeral head in glenoid cavity of scapula

    • Innervation
    • Suprascapular nerve (C5 and C6) (C5, C6)

    • Arterial Supply
    • Suprascapular and circumflex scapular arteries
  25. Dorsal Interossei
    • Origin
    • Dorsal 1 - 4: Adjacent sides of two metacarpals (bipennate muscles)

    • Insertion
    • Dorsal 1 - 4: Extensor expansions and bases of proximal phalanges of digits 2 - 4

    • Action
    • Dorsal 1 - 4: Abduct digits from axial line and act with lumbricals to flex metacarpophalangeal joints and extend interphalangeal joints

    • Innervation
    • Deep branch of ulnar nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Dorsal 1 - 4: Dorsal and palmar metacarpal arteries
  26. Palmar Interossei
    • Origin
    • Palmar 1 - 3: Palmar surfaces of 2nd, 4th and 5th metacarpals (unipennate muscles)

    • Insertion
    • Palmar 1 - 3: Extensor expansions of digits and bases of proximal phalanges of digits 2, 4 and 5

    • Action
    • Palmar 1 - 3: Adduct digits toward axial line and assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

    • Innervation
    • Deep branch of ulnar nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Palmar 1 - 3: Palmar metacarpal arteries
  27. Latissimus Dorsi
    • Origin
    • Spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs

    • Insertion
    • Floor of intertubercular groove of humerus

    • Action
    • Extends, adducts, and medially rotates humerus; raises body toward arms during climbing

    • Innervation
    • Thoracodorsal nerve (C6, C7, and C8) (C6, C7, C8)

    • Arterial Supply
    • Thoracodorsal artery
  28. Levator Scapulae
    • Origin
    • Posterior tubercles of transverse processes of C1 - C4 vertebrae

    • Insertion
    • Superior part of medial border of scapula

    • Action
    • Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula

    • Innervation
    • Dorsal scapula (C5) and cervical (C3 and C4) nerves (C3, C4, C5)

    • Arterial Supply
    • Dorsal scapular artery
  29. Opponens Digiti Minimi
    • Origin
    • Hook of hamate and flexor retinaculum

    • Insertion
    • Medial border of 5th metacarpal

    • Action
    • Draws 5th metacarpal anteriorly and rotates it, bringing little finger (5th digit) into opposition with thumb

    • Innervation
    • Deep branch of ulnar nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Ulnar artery
  30. Opponens Pollicis
    • Origin
    • Flexor retinaculum and tubercles of scaphoid and trapezium

    • Insertion
    • Lateral side of 1st metacarpal

    • Action
    • Draws 1st metacarpal laterally to oppose thumb toward center of palm and rotates it medially

    • Innervation
    • Recurrent branch of median nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Superficial palmar branch of the radial artery
  31. Palmaris Longus
    • Origin
    • Medial epicondyle of humerus

    • Insertion
    • Distal half of flexor retinaculum and palmar aponeurosis

    • Action
    • Flexes hand (at wrist) and tightens palmar aponeurosis

    • Innervation
    • Median nerve (C7 and C8) (C7, C8)

    • Arterial Supply
    • Ulnar artery
  32. Pectoralis Major
    • Origin
    • Clavicular head: anterior surface of medial half of clavicle; Sternocostal head: anterior surface of sternum, superior six costal cartilages, and aponeurosis of external oblique muscle

    • Insertion
    • Lateral lip of intertubercular groove of humerus

    • Action
    • Adducts and medially rotates humerus; draws scapula anteriorly and inferiorly; Acting alone: clavicular head flexes humerus and sternocostal head extends it

    • Innervation
    • Lateral and medial pectoral nerves; clavicular head (C5 and C6, sternocostal head (C7, C8, and T1) (C5, C6, C7, C8, T1)

    • Arterial Supply
    • pectoral branch of the thoracoacromial trunk
  33. Pectoralis Minor
    • Origin
    • 3rd to 5th ribs near their costal cartilages

    • Insertion
    • Medial border and superior surface of coracoid process of scapula

    • Action
    • Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall

    • Innervation
    • Medial pectoral nerves; clavicular head (C8 and T1) (C8, T1)

    • Arterial Supply
    • Pectoral branch of the thoracoacromial trunk
  34. Pronator Quadratus
    • Origin
    • Distal 1/4 of anterior surface of ulna

    • Insertion
    • Distal 1/4 of anterior surface of radius

    • Action
    • Pronates forearm; deep fibers bind radius and ulna together

    • Innervation
    • Anterior interosseous nerve from median nerve (C8 and T1) (C8, T1)

    • Arterial Supply
    • Anterior interosseous artery
  35. Pronator Teres
    • Origin
    • Medial epicondyle of humerus and coronoid process of ulna

    • Insertion
    • Middle of lateral surface of radius

    • Action
    • Pronates and flexes forearm (at elbow)

    • Innervation
    • Median nerve (C6 and C7) (C6, C7)

    • Arterial Supply
    • Ulnar artery, anterior recurrent ulnar artery
  36. Rhomboid Major and Minor
    • Origin
    • Minor: nuchal ligament and spinous processes of C7 and T1 vertebrae; Major: spinous processes of T2 - T5 vertebrae

    • Insertion
    • Medial border of scapula from level of spine to inferior angle

    • Action
    • Retract scapula and rotate it to depress glenoid cavity; fix scapula to thoracic wall

    • Innervation
    • Dorsal scapular nerve ( C4 and C5) (C4, C5)

    • Arterial Supply
    • Dorsal scapular artery
  37. Serratus Anterior
    • Origin
    • Superolateral surfaces of upper 8 or 9 ribs at the side of chest

    • Insertion
    • Vertebral border of scapula

    • Action
    • Draws scapula forward and upward; abducts scapula and rotates it; stabilizes vertebral border of scapula

    • Innervation
    • Long thoracic nerve (C5, C6, C7) (C5, C6, C7)

    • Arterial Supply
    • Circumflex scapular artery
  38. Subscapularis
    • Origin
    • Subscapular fossa of scapula

    • Insertion
    • Lesser tuberosity of humerus

    • Action
    • Medially rotates arm and adducts it; helps to hold humeral head in glenoid cavity of scapula

    • Innervation
    • Upper and lower subscapular nerves (C5, C6 and C7) (C5, C6, C7)

    • Arterial Supply
    • Subscapular artery
  39. Supinator
    • Origin
    • Lateral epicondyle of humerus, radial collateral and annular ligaments, supinator fossa and crest of ulna

    • Insertion
    • Lateral, posterior and anterior surfaces of proximal 1/3 of radius

    • Action
    • Supinates forearm (i.e., rotates radius to turn palm anteriorly)

    • Innervation
    • Deep branch of radial nerve (C5 and C6) (C5, C6)

    • Arterial Supply
    • Recurrent interosseous artery
  40. Supraspinatus
    • Origin
    • Supraspinous fossa of scapula

    • Insertion
    • Superior facet on greater tuberosity of humerus

    • Action
    • Initiates and assists deltoid in abduction of arm and acts with other rotator cuff muscles

    • Innervation
    • Suprascapular nerve (C4, C5 and C6) (C4, C5, C6)

    • Arterial Supply
    • Suprascapular artery
  41. Teres Major
    • Origin
    • Dorsal surface of inferior angle of scapula

    • Insertion
    • Medial lip of intertubercular groove of humerus

    • Action
    • Adducts and medially rotates arm

    • Innervation
    • Lower subscapular nerve (C6 and C7) (C6, C7)

    • Arterial Supply
    • Subscapular and circumflex scapular arteries
  42. Teres Minor
    • Origin
    • Superior part of lateral border of scapula

    • Insertion
    • Inferior facet on greater tuberosity of humerus

    • Action
    • Laterally rotate arm; helps to hold humeral head in glenoid cavity of scapula

    • Innervation
    • Axillary nerve (C5 and C6) (C5, C6)

    • Arterial Supply
    • Subscapular and circumflex scapular arteries
  43. Trapezius
    • Origin
    • Medial third of superior nuchal line; external occipital protruberance, nuchal ligament, and spinous processes of C7 - T12 vertebrae

    • Insertion
    • Lateral third of clavicle, acromion, and spine of scapula

    • Action
    • Elevates, retracts and rotates scapula; superior fibers elevate, middle fibers retract, and inferior fibers depress scapula; superior and inferior fibers act together in superior rotation of scapula

    • Innervation
    • Spinal root of accessory nerve (CN XI) (motor) and cervical nerves (C3 and C4) (pain and proprioception) (XI, C3, C4)

    • Arterial Supply
    • Transverse certical artery
  44. Triceps Brachii
    • Origin
    • Long head: infraglenoid tubercle of scapula; Lateral head: posterior surface of humerus, superior to radial groove; Medial head: posterior surface of humerus, inferior to radial groove

    • Insertion
    • Proximal end of olecranon process of ulna and fascia of forearm

    • Action
    • Chief extensor of forearm; long head steadies head of abducted humerus

    • Innervation
    • Radial nerve (C6, C7 and C8) (C6, C7, C8)

    • Arterial Supply
    • Branches of deep brachial artery

What would you like to do?

Home > Flashcards > Print Preview