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Human Anatomy Exam III > Arm & Forearm > Flashcards

Arm & Forearm Flashcards

1
Q

Biceps Brachii long head origin

A

Supraglenoid tubercle of scapula

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2
Q

Biceps Brachii short head origin

A

Coracoid process of scapula

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3
Q

Biceps Brachii insertion

A

Radial (bicipital) tuberosity of radius

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4
Q

Biceps Brachii action

A

Flexes & supinates forearm (slight arm flexion)

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5
Q

Biceps Brachii supply

A

Musculocutaneous n & brachial vessels

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6
Q

Coracobrachialis origin

A

Coracoid process of scapula

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7
Q

Coracobrachialis insertion

A

Medial surface of middle of humerus

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8
Q

Coracobrachialis action

A

Flexes & adducts

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9
Q

Coracobrachialis supply

A

Musculocutaneous n & brachial vessels

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10
Q

Brachialis origin

A

Lower half of anterior humerus

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11
Q

Brachialis insertion

A

Ulnar tuberosity of ulna

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12
Q

Brachialis action

A

Flexes forearm

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13
Q

Brachialis supply

A

Radial & musculocutaneous nn & brachial vessels

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14
Q

Triceps Brachii long head origin

A

Infraglenoid tubercle of scapula

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15
Q

Triceps Brachii lateral head origin

A

Posterior shaft of humerus

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16
Q

Triceps Brachii medial head origin

A

Posterior shaft of humerus

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17
Q

Triceps Brachii insertion

A

Olecranon process of ulna

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18
Q

Triceps Brachii action

A

Extends forearm

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19
Q

Triceps Brachii supply

A

Radial n & deep brachial vessels

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20
Q

What is contained within the cubital fossa?

A

Biceps brachii tendon, brachial a, median n

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21
Q

What vein lies above the cubital fossa?

A

Median cubital vein

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22
Q

In the cubital fossa, what are the brachial a & median n protected by?

A

Bicipital aponeurosis

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23
Q

What are the boundaries of the cubital fossa?

A

Lateral: brachioradialis
Medial: pronator teres
Superior: line between humeral epicondyles
Floor: supinator & brachialis mm

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24
Q

What two muscles contract to promote pronation?

A

Pronator teres & Pronator quadratus

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25
Q

What two muscles contract to promote supination?

A

Supinator & Biceps Brachii

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26
Q

In pronation, how do the radius and ulna interact?

A

Radius crosses over ulna (opposite for supination)

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27
Q

For the anterior compartment of the forearm, what are the superficial muscles?

A

Flexor Carpi Ulnaris (FCU), Palmaris Longus, Flexor Carpi Radialis (FCR), Pronator Teres

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28
Q

For the anterior compartment of the forearm, what is the intermediate muscle?

A

Flexor Digitorum Superficialis

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29
Q

For the anterior compartment of the forearm, what are the deep muscles?

A

Flexor Digitorum Profundus, Flexor Pollicis Longus, Pronator Quadratus

30
Q

What nerves are primarily responsible for innervating the anterior compartment of the forearm? From where do they derive?

A

Median and ulnar nn = C6, C7, C8, T1

C5 is not included because it is too proximal. We are now considering just the forearm

31
Q

Flexor Carpi Ulnaris innervation & action

A 
Ulnar n (mostly C8, but also C7 & T1)
Flexor and adductor of wrist
32
Q

Palmaris Longus innervation & action

A 
Median n (C7, C8)
Flexor of wrist
33
Q

Flexor Carpi Radialis innervation & action

A 
Median n (C6, C7)
Flexor and abductor of wrist
*Landmark = lateral position
34
Q

Pronator Teres innervation & action

A

Median n path (C6, C7)

Pronates forearm

35
Q

Flexor Digitorum Superficialis innervation & action (don’t forget joints)

A 
Median n (mostly C8, but also T1)
Flexor of metacarpophalangeal joint & proximal interphalangeal joint
Flexor of wrist
Made up of 4 tendons
36
Q

Flexor Digitorum Profundus innervation & action (don’t forget joints)

A

Median & ulnar nn (mostly C8, but also T1)
Flexor of metacarpophalangeal joint & proximal & distal interphalangeal joints
Flexor of wrist
Made up of 4 tendons

37
Q

Flexor Pollicis Longus innervation & action

A 
Median n (C7, C8)
Flexor of thumb
38
Q

Pronator Quadratus innervation & action

A 
Median n (C7, C8)
Pronation
39
Q

For the posterior compartment of the forearm, what are the superficial muscles?

A

Brachioradialis, Extensor Carpi Radialis Longus, Extensor Carpi Radialis Brevis, Extensor Digitorum, Extensor Digiti Minimi, Extensor Carpi Ulnaris, Anconeus

40
Q

For the posterior compartment of the forearm, what are the deep muscles?

A

Supinator, Abductor Pollicis Longus, Extensor Pollicis Brevis, Extensor Pollicis Longus, Extensor Indicis

41
Q

Brachioradialis action

A

Flexor at elbow

Lateral border of cubital fossa

42
Q

Extensor Carpi Radialis Longus action

A

Extends & abducts wrist

Extends to base of metacarpal 2

43
Q

Extensor Carpi Radialis Brevis

A

Extends & abducts wrist (more medial than Longus)

Extends to base of metacarpal 3

44
Q

Extensor Digitorum

A

Extends fingers & wrist

Extensor expansion of digits 2-5

45
Q

Extensor Digiti Minimi

A

Extends little finger

46
Q

Extensor Carpi Ulnaris

A

Extends & adducts wrist (most medial)

47
Q

Anconeus

A

Abducts ulna in pronation & extends elbow

48
Q

Supinator action & innervation

A

Supinates; posterior interosseus n (C6, C7)

49
Q

Abductor Pollicis Longus action & inneration

A

Abducts carpometacarpal jt thumb; posterior interosseus n (C7, C8)

50
Q

Extensor Pollicis Brevis action & innervation

A

Extends metacarpophalangeal jt. thumb & extends metacarpometacarpal jt; posterior interosseus n (C7, C8)

51
Q

Extensor Pollicis Longus action & innervation

A

Extends interphalangeal jt thumb, also metacarophalangeal & carometacarpal jts thumb; posterior interosseus n (C7, C8)

52
Q

Extensor Indicis action & innervation

A

Extends index finger; posterior interosseus n (C7, C8)

53
Q

What nerve is primarily responsible for innervating the posterior compartment of the forearm? From where does it originate?

A

Radial n; C5-C8

54
Q

Where does posterior interosseus nerve come from?

A

It is a continuation of the deep branch of the radial nerve, after this has crossed the Supinator muscle

55
Q

What does musculocutaneous nerve supply?

A

All of Biceps Brachii & medial part of Brachialis m

56
Q

Between Biceps Brachii & medial part of Brachialis m, what nerve emerges? It is a continuation of what nerve?

A

Lateral Antibrachial Cutaneous nerve

Continuation of Musculocutaneous n

57
Q

What does the Lateral Antibrachial Cutaneous n supply?

A

Skin of lateral forearm

58
Q

Where does Median n run?

A

Between superficial & deep anterior forearm mm

59
Q

What does Median n supply?

A

Most of anterior forearm mm

60
Q

What branch of the Median nerve continues under carpal tunnel to supply the lateral hand? What kind of nerve is it?

A

Palmar branch

Cutaneous

61
Q

What space does Median n enter?

A

Cubital Fossa

62
Q

Where does Ulnar n run?

A

In cubital tunnel between medial epicondyle & olecranon

*Very superficial at this point (funny bone)

63
Q

What does the Ulnar n supply?

A

Dives deep into medial forearm to supply it; continues over carpal tunnel to supply medial hand & deepest mm of hand

64
Q

Does the Ulnar nerve travel superficial or deep to flexor retinaculum?

A

Superficial

65
Q

Where does Radial n run?

A

With deep brachial a in radial groove of humerus (between lateral & medial heads of Triceps Brachii)

66
Q

What does Radial n supply?

A

All of Triceps Brachii & lateral part of Brachialis

67
Q

What do the branches of Radial n supply?

A

Superficial branch continues to supply skin on back of hand

Deep branch dives to supply mm of posterior forearm

68
Q

Brachial a is a direct continuation of what artery?

A

Axillary

69
Q

How does Brachial a run?

A

From inferior border of Teres Major to its bifurcation

70
Q

What does Brachial a split into? Where?

A

Splits to radial and ulnar aa in cubital fossa

71
Q

What branches are sent off at the bifurcation of Brachial a?

A

Deep brachial a & several muscular branches

Superior & inferior ulnar collateral aa

Human Anatomy Exam III (5 decks)

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