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Anatomy Exam 2: Lectures 8-15 > Lecture 11: Antebrachium and Elbow > Flashcards

Lecture 11: Antebrachium and Elbow Flashcards

1
Q

What is the ante brachium divided into?

A

anterior and posterior compartments by facial septae that are continuous with the deep fascia that

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2
Q

on the posterior surface the deep fascia thickens and forms a _________ that converts the grooves form the radius into________ for extensor tendons.

A

transverse; tunnels

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3
Q

What is the common origin of the anterior compartment of muscles?

A

medial epicondyle of the humerus

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4
Q

What is the common function of the anterior compartment of muscles?

A

wrist and digit flexion

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5
Q

What is the innervation of the anterior compartment of muscles?

A

median and ulnar nerves

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6
Q

What are the superficial muscles of the anterior compartment of muscles?

A

pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris

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7
Q

What are the intermediate muscles of the anterior compartment of muscles?

A

flexor digitorum superficialis

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8
Q

Proximal attachment of flexor digitorum superficialis

A

humero ulnar head

radial head

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9
Q

distal attachment of flexor digitorum superficialis

A

shafts of middle phalanges of digest II through V

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10
Q

Action of flexor digitorum superficialis

A

flexes middle phalanges of medial four fingers
flex proximal phalanges at MP joints by continued action
capable of flexing each finger independently

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11
Q

Innervation of flexor digitorum superficialis

A

median nerve (C7, 8, T1)

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12
Q

Proximal attachment of flexor digitorum profundus

A

proximal two thirds of anterior surface of ulna and interosseous membrane

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13
Q

Distal attachment of flexor digitorum profundus

A

distal phalanges 2-5

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14
Q

What muscle is the only one that can flex the distal IP joints of the fingers?

A

flexor digitorum profundus

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15
Q

What is the action of the flexor digitorum profundus?

A

flex index finger independently

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16
Q

Blood supply of flexor digitorum profundus

A

anterior interosseous artery

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17
Q

Innervation of flexor digitorum profundus

A

median nerve via anterior interosseous nerve (C8, T1) and ulnar nerve (C8, T1)

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18
Q

Proximal attachment of flexor pollicis longus

A

mid anterior surface of radius and interosseous membrane

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19
Q

Distal attachment of flexor pollicis longus

A

distal phalanx of thumb

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20
Q

Action of flexor pollicis longus

A

flexes distal phalanx of thumb

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21
Q

Innervation of flexor pollicis longus

A

median nerve (C8, T1)

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22
Q

Common function of muscles of posterior antebrachium

A

primarily wrist and hand extensors

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23
Q

Common origin of muscles of posterior antebrachium

A

lateral epicondyle of humerus

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24
Q

What are the muscles of the posterior antebrachium?

A 
brachioradialis 
extensor carpi radialis longus
extensor carpi radialis brevis
extensor digitorum 
extensor digiti minimi
extensor carpi ulnaris
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25
All muscles of the posterior forearm are innervated by the _____ via the deep branch or the _________ nerve
radial nerve, posterior interosseous nerve
26
Brachioradialis proximal attachment
proximal 2/3 of supraepicondylar ridge of humerus
27
Brachioradialis distal attachment
distal radius, proximal to styloid process
28
Brachioradialis actions
flexes forearm when it is pronated (about mid prone position)
29
Brachioradialis blood supply
radila collateral artery, radial recurrent artery, radial artery
30
Brachioradialis innervation
radial nerve (C5, 6, 7)
31
Extensor carpi radialis longus proximal attachment
lateral supracondylar ridge of humerus
32
Extensor carpi radialis longus distal attachment
dorsal aspect of base of 2nd metacarpal
33
Extensor carpi radialis longus actions
extends and abducts hand at wrist
34
Extensor carpi radialis longus blood supply
radial collateral artery, radial recurrent artery, recurrent interosseous artery and posterior interosseous
35
Extensor carpi radialis longus innervation
radial nerce (C6, 7)
36
Extensor carpi radialis brevis proximal attachment
lateral epicondyle of humerus (common extensor origin)
37
Extensor carpi radialis brevis distal attachment
dorsal aspect of base of 3rd metacarpal
38
Extensor carpi radialis brevis actions
extends and abducts hand at wrist
39
Extensor carpi radialis brevis blood supply
radial collateral artery, radial recurrent artery, recurrent interosseous artery, and posterior interosseous artery
40
Extensor carpi radialis brevis innervation
deep branch of radial nerve (C7, 8)
41
extensor digitorum proximal attachment
lateral epicondyle of humerus
42
extensor digitorum distal attachment
extensor expansions of medial four fingers
43
extensor digitorum actions
extends medial 4 fingers at metacarpophalangeal joints and somewhat at interphalangeal joints
44
extensor digitorum blood supply
posterior interosseous artery, recurrent interosseous, and perforating branch of the anterior interosseous arteries
45
extensor digitorum innervation
posterior interosseous nerve (C7, 8)
46
extensor digiti minimi proximal attachment
lateral epicondyle of humerus
47
extensor digiti minimi distal attachment
extensor expansion of fifth finger
48
extensor digiti minimi actions
extends 5th finger at metacarpophalangeal joint and somewhat at interphalangeal joint
49
extensor digiti minimi blood supply
posterior interosseous artery, recurrent interosseous, and perforating branch of the anterior interosseous arteries
50
extensor digiti minimi innervation
posterior interosseous nerve (C7, 8)
51
extensor carpi ulnaris proximal attachment
lateral epicondyle of humerus and posterior border of ulna
52
extensor carpi ulnaris distal attachment
dorsal aspect of base of fifth metacarpal
53
extensor carpi ulnaris actions
extends and adducts hand at wrist
54
extensor carpi ulnaris blood supply
radial collateral artery, recurrent interosseous, and posterior interosseous artery
55
extensor carpi ulnaris innervation
posterior interosseous nerve (C7, 8)
56
What are the four deep muscles of the posterior ante brachium?
``` aductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis supinator ```
57
pronator quadratus proximal attachment
distal third of ulna
58
pronator quadratus distal attachment
distal third of radius
59
pronator quadratus action
pronates forearm, helps interosseous membrane to hold radius and ulna together
60
pronator quadratus innervation
anterior interosseous branch of median nerve (C8, T1)
61
pronator teres proximal attachment
ulnar head: coronoid process of ulna; humeral head: medial epicondyle and supracondular ridge
62
pronator teres distal attachment
middle third of lateral surface of radius
63
pronator teres action
pronates forearm, flexes antebrachium
64
pronator teres innervation
median nerve (C6,7)
65
supinator proximal attachment
lateral epicondyle of humerus, radial collateral and annular ligaments, ulnar crest
66
supinator distal attachment
proximal 1/3 of radius
67
supinator action
supinates forearm, brings radius back to anatomical position
68
supinator innervation
deep branch of radial nerve (C7, 8)
69
What is the functional neurological level of the median nerve?
C7
70
What does the ulnar nerve supply?
flexor carpi ulnaris | half of flexor digitorum profundus
71
What are the branches of the ulnar artery?
anterior ulnar recurrent to inferior ulnar collateral posterior ulnar recurrent to anterior ulnar collateral common interosseous to anterior and posterior interosseous
72
What are the branches of the radial artery?
radial recurrent dorsal carpal artery dorsal metacarpal and digital arteries first dorsal metacarpal: princeps pollicis and radialis indicis
73
What type of joint is the elbow complex?
hinge joint | uniaxial
74
What is the function of the elbow complex?
antebrachium extension, flexion, supination, and pronation
75
What are the joints of the elbow complex?
``` humeroulnar joint humeroradial joint radioulnar joint (superior, inferior, intermediate) ```
76
What does the humeroulnar joint articulate with and do?
trochlear notch to trochlear | flexion and extension
77
What does the humeroradial joint articulate with and do?
fovea of head of radius and capitulum | flexion, extension, pronation and supination
78
What does the superior radioulnar joint articulate with
radial notice of ulna and annular ligament
79
What does the inferior radioulnar joint articulate with
ulnar notch of radius, articular disc, head of ulna
80
What does the intermediate radiounlar joint articulate with?
interosseous membrane | syndesmosis
81
What are the three different articulations of the elbow joint?
humeroulnar articulation humeroradial articulation proxiaml radioulnar articulation
82
Describe the medial (ulnar) collateral ligament
medial epicondyle to coronoid process and olecranon process | slack ligament results in valgus deformity
83
Describe the lateral (radial) collateral ligament?
lateral epicondyle to annular ligament and olecranon process | slack ligament results in varus deformity
84
Describe the annular ligament
attached to ulna | forms sling around neck of radius
85
Describe the close packed position
extension
86
What are the axes of the carrying angle?
longitudinal axis of humerus | long axis through trochlea
87
What is increase in the carrying angle?
cubitus valgus
88
What is the decrease in the carrying angle?
cubitus varus
89
What is the relationship of the ulnar nerve to the elbow complex?
medial epicondyle olecranon process ulnar nerve runs posterior to medial epicondyle of humerus origins of flexor carpi ulnaris
90
What is the relationship of the bicipital aponeurosis to the elbow complex?
brachial artery and median cubital vein
91
What is the relationship of the median to the elbow complex?
to the brachial artery
92
In the elbow complex the epicondyles of the humerus go to
collateral arteries of cubital region
93
In the elbow complex the ulnar artery goes to the
deep head of pronator teres
94
In the elbow complex the median nerve goes to the
heads of pronator teres
95
In the elbow complex the superficial and deep radial nerves go to
supinator

Anatomy Exam 2: Lectures 8-15 (7 decks)

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