Test 3 Muscles Flashcards Preview

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Flashcards in Test 3 Muscles Deck (60):
1

Biceps Brachii (both heads)

Short head: orig. Coracoid Process. Attach. Radial tuberosity.
Long head: orig. Supreglenoid tubercle. Attach. Forearm aponeurosis

Musculocutaneus nerve

Supinates forearm.
Flexes Supinated forearm
Flexes arm

2

Triceps Brachii (all three)

Origin:
Long head: Infraglenoid tubercle on scapula
long head insert: Medial and lateral heads of olecranon process on the ulna.

Lateral head: Posterior surface of the humerus superior to the radial groove.
Medial head: Posterior surface of the humerus inferior to the radial groove.
Insertion: Common tendon insertion

Radial Nerve

Extension of forearm and at glenohumeral joint (arm)
Long head: Accessory adductor

3

Long Head of the Triceps

Orig Infraglenoid tubercle on scapula
Insert Medial and lateral heads of olecranon process on the ulna.

Radial nerve

Extension of forearm and at glenohumeral joint(arm)
Accessory adductor****

4

Medial Head of the Triceps

Orig: Posterior surface of the humerus inferior to the radial groove.
Insert: Common tendon insertion

Radial nerve

Extension of the forearm and at the glenohumeral joint (arm)

5

Lateral Head of the Triceps

Orig: Posterior surface of the humerus superior to the radial groove
Insert: Common tendon insertion

Radial Nerve

Extension of the forearm and at the glenohumeral joint (arm)

6

Biceps Brachii (long head)

Orig: Supraglenoid tubercle
Insert: Forearm aponeurosis

Musculocutaneous Nerve.

Supinates forearm , Flexes supinated forearm, Flexes arm.

7

Biceps Brachii (short head)

Orig: Coracoid process
Insert: Radial tuberosity

Musculocutaneous Nerve.

Supinates forearm, Flexes supinated forearm, Flexes arm.

8

Brachialis

Orig: Distal 1/2 ANTERIOR surface of humerus, intermuscular septae.
Insert: Ulnar tuberosity

Musculocutaneous Nerve.

POWERFUL flexor of forearm in ALL positions.

9

Coracobrachialis

Orig: Coracoid process of scapula
Insert: Middle 1/3 of MEDIAL surface of the humerus.

Musculocutaneous Nerve.

Flexion and adduction of arm.

10

Deltoid (whole muscle)

Origin:
Posterior: Inferior edge of the crest of the spine of the scapula
Middle: Lateral margin of the aromion
Anterior: Anterior border of lateral 1/3 of clavicle.

Insert: Deltoid tuberosity of humerus.

Axillary Nerve.

Abductor (after initial 15 degrees)
Anterior fibers flex arm
Posterior fibers extend arm.

11

Deltoid (Anterior Fibers)

Orig: Anterior border of lateral 1/3 of clavicle
Insert: Deltoid tuberosity of humerus

Axillary nerve

Abductor (after initial 15 degrees)
Anterior fibers flex arm.

12

Deltoid (posterior fibers)

Orig: Inferior edge of the crest of the spine of the scapula.
Insert: Deltoid tuberosity of humerus.

Axillary nerve

Abductor *after initial 15 degrees
Posterior fibers Extend arm.

13

Trapezius

Origin:
Superior Nuchal Line.
Occipital protuberance
Medial margin of ligamentum nuchae
Spinous process of C7-T12

Insert:
Superior edge of the crest of the spine of the scapula, acromion, posterior border of lateral 1/3 of clavicle.

Cranial Nerve XI (Spinal accessory nerve)

Elevates and rotates the scapula
Middle fibers retract scapula
Lower fibers depress scapula

14

Trapezius upper fibers

Orig.: Superior nuchal line and Occipital Protuberand and Medial margin of ligamentum nuchae.
Insert: Superior edge of the crest of the spine of the scapula, acromion, posterior border of lateral 1/3 of clavicle

Cranial Nerve XI (Spinal accessory nerve)

Elevates and rotates the scapula

15

Trapezius middle fibers

Orig: Medial margin of ligamentum nuchae, Spinous processes of C7-?
Insert: Superior edge of the crest of the spine of the scapula, acromion, posterior border of lateral 1/3 of clavicle.

Cranial Nerve XI (Spinal accessory nerve)

Middle fibers retract scapula.

16

Trapezius Lower fibers

Orig: Spinous processes of C& - T12
Insert: Superior edge of the crest of the spine of the scapula, acromion, posterior border of lateral 1/3 of clavicle.

Cranial Nerve XI (Spinal accessory nerve)

Lower fibers depress scapula.

17

Levator Scapula

Orig. Transverse process of C1 and C2 and Posterior tubercles of transverse processes of C3-C4
Insert. Posterior surface of medial border of scapula from superior angle to root of the spine of scapula.

Dorsal Scapular nerve

Elevates scapula

18

Rhomboid Minor

Orig: Lower end of ligamentum nuchae. and Spinous processes of C7 and T1.
Insert: Posterior surface of medial border of scpula at the root of the spine of the scapula.

Dorsal Scapular Nerve

Elevates and retracts scapula.
Downward rotation of scapula.

19

Rhomboid Major

Orig: Spinous processes of T2-T5 and intervening supraspinous ligaments.
INsert: Posterior surface of medial border of scapula from root of the spine of the scapula to the inferior angle

Dorsal scapular nerve

Elevates and retracts scapula
Downward rotation of scapula

20

Supraspinatus

Orig: Medial 2/3 of the supraspinous fossa
Insert: Superior facet on greater tubercle of humerus

Suprascapular nerve

Abduction

21

Infraspinatus

Orig: Medial 2/3 of the infraspinous fossa
Insert: Middle facet on greater tubercle of humerus

Suprascapular nerve

Lateral rotation of the arm.

22

Teres Minor

Orig: Lateral border of the scapula (Upper 2/3 of a flattened strip of bone)
Insert: Inferior facet on greater tubercle of humerus.

Axillary Nerve

Lateral rotation of the arm.

23

Teres Major

Orig: Inferior angle of the scapula
Insert: Medial lip of the intertubercular sulcus on anterior side of humerus

Inferior subscapular nerve

Medial rotation and extension of the arm.

24

Pectoralis Major

Orig: Clavicular head: Anterior surface of the medial half of clavicle
Sternal Head: Anterior surface of sternum.
Insert: Lateral lip of intertubercular sulcus of humerus.

Medial and lateral pectoral nerves

Flexion, adduction, and medial rotation of arm
Clavicular head: Flexion of extended arm.

25

Pectoralis Major Clavicular head

Orig: Anterior surface of the medial half of clavicle
Insert: Lateral lip of intertubercular sulcus of humerus.

Medial and lateral pectoral nerves

Flexion of extended arm.

26

Pectoralis Major Sternal Head

Orig: Anterior suface of sternum.
Insert: Lateral lip of intertubercular sulcus of humerus.

Medial and lateral pectoral nerves.

FLexion, adduction, and medial rotation of arm.

27

Subclavius

Orig: First rib at junction of rib and costal cartilage
Insert: Groove of inferior surface of middle 1/3 of clavicle

Nerve to subclavius

Pulls tip of shoulder down
Pulls clavicle medially

28

Subscapularis

Orig: Middle 2/3 of subscapular fossa
Insert: Lesser tubercle of humerus

Upper and lower subscapular nerves

Medial rotation of the arm.

29

Latissimus Dorsi

Orig: Spinous process of lower six thoracic vertebrae. Thoracolumbar fascia to the spinous processes of the lumbar vertebrae. Iliac crest. Lower 3-4 ribs.
Insert: Floor of intertubercular sulcus

Thoracodorsal nerve.

Adduction
Medial rotation
Extension

30

Flexor Carpi Ulnaris

Orig: Medial epicondyle of the humerus
Insert: Pisiform, hamate, base of metacarpal 5

Ulnar nerve

Flexes elbow
Flexes and adducts wrist.

31

Palmaris Longus

Orig:Medial epicondyle of the humerus
Insert: Palmar aponeurosis of the hand

Median nerve

Flexes elbow
Flexes wrist.

32

Flexor Carpi Radialis

Orig: Medial epicondyle of the humerus
Insert: Base of metacarpal 2 and 3

Median nerve

Flexes elbow
Flexes and abducts wrist.

33

Pronator Teres

Orig: Medial epicondyle and adjacent supraepicondylar ridge
Insert: Mid-shaft of the radius

Median Nerve

Flexes elbow
Pronation of Forearm

34

Flexor Digitorum Superficialis

Orig: Medial epicondyle of humerus and oblique line of radius
Insert: Middle Phalanges of digits 2-5.

Median Nerve

Flexes PIP joint of 2-5, Flexes MCP joint 2-5 (fingers), Flexes wrist.

35

Flexor Digitorum Profundus

Orig: Anterior and medial surfaces of the ulna and interosseous membrane.
Insert: Distal phalanges of digits 2-5

Lateral half: Median (lateral 3 fingers)
Medial half: Ulnar (Ring and pinky finger)

Flexes DIP of 2-5, flexes MCP joint 2-5, flexes wrist.

36

Flexor Pollicis Longus

Orig: Anterior surface of radius and radial half of interosseous membrane.
Insert: Base of distal phalanx of thumb.

Median Nerve

Flexes IP joint of the thumb, Flexes the MCP joint of the thumb.

37

Pronator Quadratus

Orig: Distal anterior surface of ulna
Insert: Distal anterior surface of radius

Median Nerve

Pronation

38

Brachioradialis

Orig: Lateral supracondylar ridge of humerus
Insert: Lateral surface of distal end of radius

Radial Nerve

Flexor of elbow joint when forearm is mid pronated.

39

Extensor Carpi Radialis Longus

Orig: Lateral supracondylar ridge of humerus.
Insert: Dorsal surface of base of metacarpal 2.

Radial nerve

Extends and abducts the wrist.

40

Extensor Carpi Radialis Brevis

Orig: Lateral epicondyl of the humerus
Insert: Dorsal surface and base of metacarpal 2 and 3.

Deep branch of radial nerve

Extends and abducts the wrist.

41

Extensor Digitorum

Orig: Lateral epicondyle of humerus
Insert: Four tendons that insert via extensor hood

Posterior interosseous nerve

Extends digits 2-5, extends wrist.

42

Extensor Digiti Minimi

Orig: Lateral epicondyle of humerus.
Insert: Extensor hood of the little finger.

Posterior interosseous nerve

Extends little finger.

43

Extensor Carpi Ulnaris

Orig: Lateral epicondyle of humerus
Insert: Base of metacarpal 5

Posterior interosseous nerve

Extends and adducts wrist

44

Anconeus

Orig: Lateral epicondyle of humerus
Insert: Olecranon and proximal posterior surface of ulna

Radial Nerve

Abduction of the ulna, extensor of elbow joint.

45

Supinator**

No Orig
No Insert

Posterior interosseous nerve

Supination

46

Abductor Pollicis Longus

Orig: Posterior surfaces of the ulna and radius and interosseous membrane.
Insert: Lateral side of base of metacarpal 1.

Posterior interosseous nerve

Abducts CMC joint of the thumb. Extends wrist, abducts thumb.

47

Extensor Pollicis Brevis

Orig: Posterior surface of radius and interosseous membrane
Insert: Dorsal surface of base of proximal phalanx of the thumb

Posterior interosseous nerve

Extends MCP and CMC joints of the thumb. Extends wrist, abducts wrist.

48

Extensor Pollicis Longus

Orig: Posterior surface of ulna and interosseous membrane
Insert: Base of distal phalanx of the thumb.

Posterior interosseous nerve

Extends IP, MCP, and CMC joints of the thumb. Extends wrist

49

Extensor Indices

Orig: Posterior surface of ulna and interosseous membrane
Insert: Extensor hood of index finger

Posterior interosseous nerve

Extends the index finger. Extends wrist.

50

Palmaris Brevis

O: Palmar aponeurosis and flexor retinaculum (retinaculum = Transverse carpal ligament)
I: Dermis of skin on the medial margin of the hand

Superficial branch of the Ulnar nerve

Improves grip

51

Dorsal Interossei

O: Adjacent sides of metacarpals
I: Extensor expansion and base of proximal phalanx of digits 2-4.

Deep branch of the ulnar nerve

Abduction of digits 2-4 at the MCP joint, flexes MCP while extending IP joints of digits 2-4

52

Palmar Interossei

O: Sides of metacarpals
I: Extensor expansion and base of proximal phalanx of digits 2, 4, 5.

Deep branch of the ulnar nerve.

Adduction of digits 2, 4, and 5 at the MCP joints, flexes MCP while extending IP joints of digits 2, 4, and 5

53

Adductor Pollicis

O: Transverse head: Metacarpal 3; Oblique head: Capitate and bases of metacarpal 2 and 3.
I: Base of proximal phalanx and extensor expansion of thumb.

Deep branch of the ulnar nerve

Adducts thumb

54

Lumbricals

O: Tendons of flexor digitorum profundus.
I: Extensor expansions of digits 2-5

Medial two: Deep branch of the ulnar nerve.
Lateral two: Digital branches of the median nerve.

Flexes MCP joints while extending IP joints of digits 2-5.

55

Opponens Pollicis

O: Tubercle of trapezium and flexor retinaculum
I: Lateral margin of adjacent palmar surface of metacarpal 1.

Recurrent branch of median nerve.

Medially rotates the thumb.

56

Abductor Pollicis Brevis

O: Tubercles of scaphoid and trapezium and adjacent flexor retinaculum.
I: Proximal phalanx and extensor hood of thumb

Recurrent branch of median nerve

Abducts thumb at MCP joint.

57

Flexor Pollicis Brevis

O: Tubercle of the trapezium and flexor retinaculum
I: Proximal phalanx of the thumb.

Recurrent branch of median nerve

Flexes thumb at MCP joint.

58

Opponens Digiti Minimi

O: Hook of hamate and flexor retinaculum
I: Medial aspect of metacarpal 5

Deep branch of the ulnar nerve

Laterally rotates metacarpal 5

59

Abductor Digiti Minimi

O: Pisiform, pisohamate ligament, tendon of flexor carpi ulnaris.
I: Proximal phalanx of digit 5

Deep branch of the ulnar nerve

Abducts digit 5 at MCP joint

60

Flexor Digiti Minimi

O: Hook of hamate and flexor retinaculum
I: Proximal phalanx of digit 5

Deep branch of the ulnar nerve

Flexes digit 5 at MCP joint.