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Human Anatomy Exam III > Arm & Forearm > Flashcards

Arm & Forearm Flashcards

(71 cards)

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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
What two muscles contract to promote supination?
Supinator & Biceps Brachii
26
In pronation, how do the radius and ulna interact?
Radius crosses over ulna (opposite for supination)
27
For the anterior compartment of the forearm, what are the superficial muscles?
Flexor Carpi Ulnaris (FCU), Palmaris Longus, Flexor Carpi Radialis (FCR), Pronator Teres
28
For the anterior compartment of the forearm, what is the intermediate muscle?
Flexor Digitorum Superficialis
29
For the anterior compartment of the forearm, what are the deep muscles?
Flexor Digitorum Profundus, Flexor Pollicis Longus, Pronator Quadratus
30
What nerves are primarily responsible for innervating the anterior compartment of the forearm? From where do they derive?
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
Flexor Carpi Ulnaris innervation & action
``` Ulnar n (mostly C8, but also C7 & T1) Flexor and adductor of wrist ```
32
Palmaris Longus innervation & action
``` Median n (C7, C8) Flexor of wrist ```
33
Flexor Carpi Radialis innervation & action
``` Median n (C6, C7) Flexor and abductor of wrist *Landmark = lateral position ```
34
Pronator Teres innervation & action
Median n path (C6, C7) | Pronates forearm
35
Flexor Digitorum Superficialis innervation & action (don't forget joints)
``` Median n (mostly C8, but also T1) Flexor of metacarpophalangeal joint & proximal interphalangeal joint Flexor of wrist Made up of 4 tendons ```
36
Flexor Digitorum Profundus innervation & action (don't forget joints)
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
Flexor Pollicis Longus innervation & action
``` Median n (C7, C8) Flexor of thumb ```
38
Pronator Quadratus innervation & action
``` Median n (C7, C8) Pronation ```
39
For the posterior compartment of the forearm, what are the superficial muscles?
Brachioradialis, Extensor Carpi Radialis Longus, Extensor Carpi Radialis Brevis, Extensor Digitorum, Extensor Digiti Minimi, Extensor Carpi Ulnaris, Anconeus
40
For the posterior compartment of the forearm, what are the deep muscles?
Supinator, Abductor Pollicis Longus, Extensor Pollicis Brevis, Extensor Pollicis Longus, Extensor Indicis
41
Brachioradialis action
Flexor at elbow | Lateral border of cubital fossa
42
Extensor Carpi Radialis Longus action
Extends & abducts wrist | Extends to base of metacarpal 2
43
Extensor Carpi Radialis Brevis
Extends & abducts wrist (more medial than Longus) | Extends to base of metacarpal 3
44
Extensor Digitorum
Extends fingers & wrist | Extensor expansion of digits 2-5
45
Extensor Digiti Minimi
Extends little finger
46
Extensor Carpi Ulnaris
Extends & adducts wrist (most medial)
47
Anconeus
Abducts ulna in pronation & extends elbow
48
Supinator action & innervation
Supinates; posterior interosseus n (C6, C7)
49
Abductor Pollicis Longus action & inneration
Abducts carpometacarpal jt thumb; posterior interosseus n (C7, C8)
50
Extensor Pollicis Brevis action & innervation
Extends metacarpophalangeal jt. thumb & extends metacarpometacarpal jt; posterior interosseus n (C7, C8)
51
Extensor Pollicis Longus action & innervation
Extends interphalangeal jt thumb, also metacarophalangeal & carometacarpal jts thumb; posterior interosseus n (C7, C8)
52
Extensor Indicis action & innervation
Extends index finger; posterior interosseus n (C7, C8)
53
What nerve is primarily responsible for innervating the posterior compartment of the forearm? From where does it originate?
Radial n; C5-C8
54
Where does posterior interosseus nerve come from?
It is a continuation of the deep branch of the radial nerve, after this has crossed the Supinator muscle
55
What does musculocutaneous nerve supply?
All of Biceps Brachii & medial part of Brachialis m
56
Between Biceps Brachii & medial part of Brachialis m, what nerve emerges? It is a continuation of what nerve?
Lateral Antibrachial Cutaneous nerve | Continuation of Musculocutaneous n
57
What does the Lateral Antibrachial Cutaneous n supply?
Skin of lateral forearm
58
Where does Median n run?
Between superficial & deep anterior forearm mm
59
What does Median n supply?
Most of anterior forearm mm
60
What branch of the Median nerve continues under carpal tunnel to supply the lateral hand? What kind of nerve is it?
Palmar branch | Cutaneous
61
What space does Median n enter?
Cubital Fossa
62
Where does Ulnar n run?
In cubital tunnel between medial epicondyle & olecranon | *Very superficial at this point (funny bone)
63
What does the Ulnar n supply?
Dives deep into medial forearm to supply it; continues over carpal tunnel to supply medial hand & deepest mm of hand
64
Does the Ulnar nerve travel superficial or deep to flexor retinaculum?
Superficial
65
Where does Radial n run?
With deep brachial a in radial groove of humerus (between lateral & medial heads of Triceps Brachii)
66
What does Radial n supply?
All of Triceps Brachii & lateral part of Brachialis
67
What do the branches of Radial n supply?
Superficial branch continues to supply skin on back of hand | Deep branch dives to supply mm of posterior forearm
68
Brachial a is a direct continuation of what artery?
Axillary
69
How does Brachial a run?
From inferior border of Teres Major to its bifurcation
70
What does Brachial a split into? Where?
Splits to radial and ulnar aa in cubital fossa
71
What branches are sent off at the bifurcation of Brachial a?
Deep brachial a & several muscular branches | Superior & inferior ulnar collateral aa

Human Anatomy Exam III (5 decks)

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