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Anatomy > Unit 3 > Flashcards

Unit 3 Flashcards

1
Q

Extensor Pollicis Longus

A

O: Posterior surface of ulna and interosseous membrane

I: Base of distal phalanx of thumb

N: Posterior interosseous nerve (Radial; C6-C8)

A: Extend thumb (IP, MCP, CMC joints); abduct wrist

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2
Q

Rhomboid minor

A

O: Spinous processes of C7-T1; nuchal ligament

I: Upper portion of medial border of scapula, across from spine of scapula

N: Dorsal scapular C4-C5

A: Adduct the scapula (scapulothoracic joint), elevate the scapula (S/T joint), downwardly rotate scapula (S/T joint)

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3
Q

Flexor Carpi Radialis

A

O: Common flexor tendon from medial epicondyle of humerus

I: Bases of 2nd/3rd metacarpals

N: Median (C6-C8)

A: Flex the wrist, abduct the wrist, may assist to flex elbow

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4
Q

Extensor Carpi Radialis Longus

A

O: Distal 1/3 of the lateral supracondylar ridge of humerus

I: base of 2nd metacarpal

N: Radial nerve (C5-C8)

A: Extend wrist, abduct wrist, assist to flex the elbow

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5
Q

Trapezius

A

O: External occipital protuberance, medial portion of superior nuchal line of the occiput, ligamentum nuchae, and spinous processes of C7-T12

I: Lateral 1/3 of clavicle, acromion, and spine of the scapula

N: Spinal portion of Cranial nerve XI (accessory) and ventral ramus of C2-4

A: Upper fibers
Bilaterally - Extend the head and neck
Unilaterally - Ipsilateral lateral flexion of head/neck; Contralateral rotation of head/neck; elevate the scapula (scapulothoracic joint); upwardly rotate the scapula (S/T joint)

Middle fibers - Adduct the scapula (S/T joint); Stabilize (S/T joint)

Lower fibers - Depress the scapula (S/T joint); upwardly rotate the scapula (S/T joint)

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6
Q

Serratus Anterior

A

O: External surfaces of upper 8-9 ribs

I: Anterior surface of medial border of scapula

N: Long thoracic C5, 6, 7, 8

A:
With the origin fixed - Abducts the scapula (scapulothoracic joint), upwardly rotates the scapula (S/T joint), Depress the scapula (S/T joint), Hold the medial border of the scapula against the rib cage

With the scapula fixed - May act to elevate the thorax during forced inhalation

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7
Q

Subscapularis

A

O: Subscapular fossa of scapula

I: Lesser tubercle of humerus

N: Upper and lower subscapular C5-C7

A: Medially rotate shoulder (glenohumeral joint), stabilize head of humerus in glenoid cavity

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8
Q

Flexor Carpi Ulnaris

A

O: (Humeral head) - Common flexor tendon from medial epicondyle of humerus
(Ulnar head) - Posterior surface of proximal two-thirds of ulna

I: Pisiform, hook of hamate, and base of fifth metacarpal

N: Ulnar (C7-T1)

A: Flex the wrist, adduct the wrist (ulnar deviation), assist to flex elbow

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9
Q

Supinator

A

O: Lateral epicondyle of Humerus, radial collateral ligament, annular ligament, supinator crest of ulna

I: Anterior, lateral surface of proximal 1/3 of radial shaft

N: Deep branch of Radial nerve (C5-C7)

A: Supinate forearm

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10
Q

Flexor Digitorum Superficialis

(2nd layer)

A

O: Common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulna, interosseous membrane, and proximal shaft of radius

I: Sides of middle phalanges of 2nd to 5th fingers

N: Median (C7-T1)

A: Flex 2nd-5th fingers (MCP and distal IP joints); assist to flex wrist

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11
Q

Biceps Brachii

A

O: Short head - Coracoid process of scapula
Long head - Supraglenoid tubercle of scapula

I: Tuberosity of the radius and aponeurosis of the biceps brachii

N: Musculocutaneous (C5, C6)

A: Flex the elbow (humeroulnar joint), supinate the forearm (radioulnar joints), flex the shoulder (glenohumeral joint)

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12
Q

Abductor Pollicis Longus

A

O: Posterior surface of radius and ulna, interosseous membrane

I: Base of 1st metacarpal

N: Posterior interosseous nerve (Radial; C6-C8)

A: Abduct thumb (CMC), extend thumb (CMC), abduct wrist

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13
Q

Flexor Digitorum Profundus

(3rd layer)

A

O: Anterior and medial surfaces of proximal 3/4 of ulna and interosseous membrane

I: Bases of distal phalanges, palmar surface of digits 2-5

N: (2nd and 3rd finger) - Median (C7-T1)
(4th and 5th finger) - Ulnar (C7-T1)

A: Flex 2-5 fingers (MCP, Distal IP joints); assist to flex wrist

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14
Q

Extensor Carpi Ulnaris

A

O: Lateral Epicondyle of Humerus (common extensor tendon)

I: Base of 5th metacarpal bone

N: Deep branch of Radial nerve (C6-C8)

A: Extend wrist, adduct wrist (ulnar deviation)

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15
Q

Infraspinatus

A

O: Infraspinous fossa of scapula

I: Greater tubercle of humerus

N: Suprascapular C4-C6

A: Laterally rotate the shoulder (glenohumeral joint), adduct shoulder (G/H joint), stabilize head of humerus in glenoid cavity

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16
Q

Brachialis

A

O: Distal half of anterior surface of humerus

I: Tuberosity and coronoid process of ulna

N: Musculocutaneous, small branch from radial (C5, C6)

A: Flex the elbow (humeroulnar joint)

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17
Q

Pectoralis Major

A

O: Medial half of clavicle, sternum, and cartilage of ribs 1-6

I: Crest of greater tubercle of humerus

N: Lateral and Medial Pectoral nerve: C5-T1

A: All fibers - Adduct the shoulder (glenohumeral joint), medially rotate the shoulder (G/H joint), Assist to elevate the thorax during forced inhalation (with arm fixed)
Upper fibers - Flex the shoulder (G/H joint), Horizontally adduct the shoulder (G/H joint)
Lower fibers - Extend the shoulder (G/H joint)

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18
Q

Teres Major

A

O: Inferior angle and lower 1/3 of lateral border of scapula

I: Crest of lesser tubercle of the humerus

N: Lower subscapular C5-C7

A: Extend the shoulder (glenohumeral joint), adduct the shoulder (G/H joint), medially rotate the shoulder

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19
Q

Subclavius

A

O: First rib and cartilage

I: Inferior surface of middle one-third of clavicle

N: Subclavian C5-C6

A: Depress the clavicle and draw it anteriorly, elevate the first rib (to assist during inhalation), stabilize the sternoclavicular joint

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20
Q

Pronator Quadratus

A

O: Medial, anterior surface of distal ulna

I: Lateral, anterior surface of distal radius

N: Anterior interosseous nerve (Median; C7-T1)

A: Pronates forearm

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21
Q

Extensor Pollicis Brevis

A

O: Posterior surface of radius and interosseous membrane

I: Base of proximal phalanx of thumb

N: Posterior interosseous nerve (Radial; C6-C8)

A: Extend thumb (MCP and CMC joints), abduct wrist

22
Q

Brachioradialis

A

O: Proximal 2/3 of lateral supracondylar ridge of humerus

I: Styloid process of radius

N: Radial (C5, C6)

A: Flex the elbow (humeroulnar joint), assist to PRONATE and SUPINATE the forearm when these movements are resisted (humeroradial joints)

23
Q

Latissimus Dorsi

A

O: Inferior angle of scapula, spinous processes of last six thoracic vertebrae, last 3-4 ribs, thoracolumbar fascia, and posterior iliac crest

I: Intertubercular groove of humerus

N: Thoracodorsal C6-C8

A: Extend the shoulder (glenohumeral joint), adduct the shoulder (G/H joint), medially rotate the shoulder (G/H joint)

24
Q

Levator Scapulae

A

O: Transverse processes of C1-C4 vertebrae

I: Medial border of scapula, between superior angle and superior portion of spine of scapula

N: Cervical 3, 4, and dorsal scapular C4-C5

A: Unilaterally - Elevate the scapula (scapulothoracic joint), downwardly rotate the scapula (S/T joint), Laterally flex head/neck, ipsilateral rotation of head/neck, extension of head/neck

25
Q

Rhomboid Major

A

O: Spinous processes of T2-T5

I: Medial border of the scapula between the spine of scapula and inferior angle

N: Dorsal scapular C4-C5

A: Adduct the scapula (scapulothoracic joint), elevate the scapula (S/T joint), downwardly rotate scapula (S/T joint)

26
Q

Coracobrachialis

A

O: Coracoid process of scapula

I: Medial surface of mid-humeral shaft

N: Musculocutaneous (C6, C7)

A: Flex the shoulder (glenohumeral joint), adduct the shoulder (G/H joint)

27
Q

Pronator Teres

A

O: Common flexor tendon from medial epicondyle of humerus and coronoid process of the ulna

I: Middle of lateral surface of radiius

N: Median (C6-C7)

A: Pronate forearm, assist to flex the elbow

28
Q

Deltoid

A

O: Lateral 1/3 of clavicle, acromion, and spine of scapula

I: Deltoid tuberosity

N: Axillary C5-C6

A:
All fibers - Abduct the shoulder (Glenohumeral joint)

Anterior fibers - Flex the shoulder (G/H joint), medially rotate the shoulder (G/H joint), horizontally adduct shoulder (G/H joint)

Posterior fibers - Extend the shoulder (G/H joint), laterally rotate the shoulder (G/H joint), horizontally abduct shoulder (G/H joint)

29
Q

Flexor Pollicis Longus

(3rd layer)

A

O: Anterior surface of radius and interosseous membrane

I: Base of distal phalanx of thumb

N: Anterior interosseous nerve (Median; C7-T1)

A: Flex the thumb (IP, MCP, CMP joints); assists in wrist flexion

30
Q

Palmaris Longus

A

O: Common flexor tendon from medial epicondyle of humerus

I: Flexor Retinaculum and palmmar aponeurosis

N: Median (C6-T1)

A: Tense the palmar fascia, flex the wrist, may assist to flex elbow

31
Q

Teres Minor

A

O: Upper 2/3 of lateral border of scapula

I: Greater tubercle of humerus

N: Axillary C5-C6

A: Laterally rotate shoulder (glenohumeral joint), adduct shoulder (G/H joint), stabilize head of humerus in glenoid cavity

32
Q

Triceps Brachii

A

O: Long head - Infraglenoid tubercle of scapula
Lateral head - Posterior surface of proximal half of humerus
Medial head - Posterior surface of distal half of humerus

I: Olecranon process of ulna

N: Radial (C6-T1)

A: All heads - Extend the elbow (humeroulnar joint)
Long head - Extend the shoulder (G/H joint), Adduct the shoulder (G/H joint)

33
Q

Supraspinatus

A

O: Supraspinous fossa of scapula

I: Greater tubercle of humerus

N: Suprascapular C4-C6

A: Abduct shoulder (glenohumeral joint), stabilize head of humerus in glenoid cavity

34
Q

Extensor Indicis

A

O: Posterior surface of ulna and interosseous membrane

I: Tendon of Extensor Digitorum at 2nd MCP

N: Posterior interosseous nerve (Radial; C6-C8)

A: Extend 2nd digit, adduct 2nd digit, assist w/ wrist extension e

35
Q

Extensor Digiti Minimi

A

O: Lateral Epicondyle of Humerus (common extensor tendon)

I: Extensor expansion of 5th digit

N: Deep branch of Radial nerve (C7, C8)

A: Extends 5th digit at MCP and IP joints

36
Q

Pectoralis Minor

A

O: Ribs 3-5

I: Medial surface of coracoid process of scapula

N: Medial pectoral, with fibers from a communicating branch of the lateral pectoral C6-T1

A: Depress the scapula (scapulothoracic joint), abduct the scapula (S/T joint), downwardly rotate the scapula (S/T joint)
With scapula fixed - Assists to elevate thorax during forced inhalation

37
Q

Extensor Digitorum

A

O: Lateral Epicondyle of Humerus (common extensor tendon)

I: Bases of middle and distal phalanges 2-5

N: Deep branch of Radial nerve (C6-C8)

A: Extend 2-5 fingers (MCP/IP joints), extend wrist

38
Q

Extensor Carpi Radialis Brevis

A

O: Lateral Epicondyle of Humerus (Common extensor tendon)

I: Base of 3rd metacarpal

N: Deep branch of radial nerve (C6-C8)

A: Extend, abduct wrist

39
Q

Anconeus

A

O: Lateral epicondyle of humerus

I: Olecranon process and posterior, proximal surface of ulna

N: Radial (C7, C8)

A: Extend the elbow (humeroulnar joint)

40
Q

Abductor Pollicis Brevis

A

O: Flexor Retinaculum, Trapezium, Scaphoid

I: Base of Proximal Phalanx of thumb

N: Median (C6-T1)

A: Abduct Thumb, assist w/ opposition

41
Q

Flexor Pollicis Brevis

A

O: Flexor Retinaculum, Trapezium, Trapezoid, Capitate

I: Base of Proximal Phalanx of thumb

N: Median (C6-T1); Ulnar (C8-T1)

A: Flex thumb, assist w/ opposition of thumb

42
Q

Opponens Pollicis

A

O: Flexor Retinaculum, Trapezium

I: 1st Metacarpal bone

N: Median (C6-T1)

A: Opposition of thumb

43
Q

Adductor Pollicis

A

O: Capitate, 2nd/3rd metacarpals

I: Base of proximal phalanx of thumb

N: Ulnar (C8-T1)

A: Adduct thumb, assist w/ flexion of thumb

44
Q

Abductor Digiti Minimi

A

O: Pisiform tendon of Flexor Carpi Ulnaris

I: Base of proximal phalanx of 5th digit (ulnar side)

N: Deep branch of Ulnar nerve (C7-T1)

A: Abduct 5th digit, assist w/ opposition of 5th digit

45
Q

Flexor Digiti Minimi Brevis

A

O: Hook of hamate, flexor retinaculum

I: Base of proximal phalanx of 5th digit (palmar side)

N: Deep branch of Ulnar nerve (C7-T1)

A: Flex proximal phalanx of 5th digit, assist w/ opposition of 5th digit

46
Q

Opponens Digiti Minimi

A

O: Hook of hamate and flexor retinaculum

I: Shaft of 5th metacarpal (ulnar side)

N: Deep branch of Ulnar nerve (C7-T1)

A: Opposition of 5th digit

47
Q

Lumbricals 1/2

A

O: Lateral two tendons of flexor digitorum profundus

I: Extensor expansions of digits 2 and 3 (Lateral sides)

N: Median nerve (C8-T1)

A: Flex digits at 2-3 joints and extend 2-3 IP joints

48
Q

Lumbricals 3/4

A

O: Medial 3 tendons of flexor digitorum profundus

I: Extensor expansion digits 4 and 5 (lateral sides)

N: Deep branch of Ulnar nerve (C8-T1)

A: Flex digits at 4-5 joints and extend 4-5 IP joints

49
Q

Dorsal Interossei 1-4

A

O: Adjacent sides of all metacarpals

I: Extensor expansions and bases of proximal phalanges of digits 2-4

N: Deep branch of Ulnar nerve (C8-T1)

A: Abduct 2-4 digits, assist w/ flexion of 2-4 digits, assist w/ extension of 2-4 digits

50
Q

Palmar Interossei 1-3

A

O: Base of 1, 2, 4, 5 Metacarpals

I: Extensor expansions of digits and bases of proximal phalanges of digits 2, 4, 5

N: Deep branch of Ulnar nerve (C8-T1)

A: Adduct digits 1, 2, 4, 5 toward 3rd digit; assist w/ flexions of 1, 2 , 4, 5 at MCP; Assist w/ extension of 1, 2, 4, 5 at MCP

Anatomy (19 decks)

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