elbow SOL Flashcards

1
Q

Which 3 bones make up the elbow joint?

A

Humerus, ulna, radius

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2
Q

What type of joint is the elbow

A

Hinge joint - humeroRadial, humeroUlna. Plane joint at proximal and distal radio ulnar joint (for gliding)

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3
Q

How many degrees of freedom does the elbow joint exhibit?

A

2 in the elbow joint complex. Flex/Ext. Sup/Pro at radioulnar joint

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4
Q

RCL - Radial collateral ligament attachments

A

Lateral epicondyle to annular ligament and radial head

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5
Q

UCL - ulnar collateral ligament attachment

A

Medial epicondyle of humerus to coronoid and olecranon process of ulna

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6
Q

What limits the elbow joint’s normal ROM

A
  • Olecranon on the humerus (bone on bone)
  • Flexors of FA to biceps (soft tissue approximation)
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7
Q

What’s carrying angle

A

Angle b//w the long axis of humerus and FA when the arm is in anatomical position
F: 10-15
M: 5-10

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8
Q

Function of carrying angle

A

To allow FA to clear the hip when walking, running, carrying object

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9
Q

Function of annular ligament

A

Hold the proximal radial head against the ulna
Permits for free rotation for radial head during sup/pro

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10
Q

Function of interosseous membrane

A
  • Link and maintain the space b//w radius and ulnar during rotation
  • transmit forces from one bone to another
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11
Q

What pass through the cubital fossa

A

Biceps tendon, brachial A, medial and radial N

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12
Q

Sup border of cubital fossa

A

An imaginary line between medial and lateral epicondyle of humerus

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13
Q

Medial border of cubital fossa

A

The lateral boundary of pronator teres

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14
Q

Lateral border of cubital fossa

A

Medial border of brachioradialis

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15
Q

Which muscles do flexion of the elbow

A

Biceps brachii, brachialis, brachioradialis, pronator teres

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16
Q

Which muscle do extension of the elbow

A

Triceps brachii, anconeus

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17
Q

Muscle that supinates FA

A

Supinations, biceps brachii, brachioradialis

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18
Q

Muscles that pronate FA

A

Pronator teres, pronator quadratus (deep)

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19
Q

Origin of biceps brachii [long head]

A

Supraglenoid tubercle of the scapula

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20
Q

Origin of biceps brachii [short head]

A

Apex of the Coracoid process

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21
Q

Insertion of biceps brachii (both heads)

A

Radial tuberosity, and fascia of the FA via bicipital aponeurosis

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22
Q

Origin of brachialis

A

Distal aspect of humerus, deep to biceps brachii

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23
Q

Insertion of brachialis

A

Coronoid process and the ulnar tubersotiy

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24
Q

Innervation of biceps brachii

A

Musculocutaneous N (C5-7)

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25
Action of biceps brachii
Flexion of the elbow, shoulder, supination
26
Innervation of brachialis (dual)
Medially: musculocutaneous N (C5-6) Laterally: radial N C7
27
Action of brachialis
Flexion of the elbow, pronation
28
Origin of brachioradialis
Lateral Supracondylar ridge of the humerus and lateral inter muscular septum
29
Insertion of brachioradialis
Long tendon attach to Styloid process of radius
30
Innervation of brachioradialis
Radial N (C5-6)
31
Action of brachioradialis
Elbow flexion, sup&pro
32
Origin of Pronator teres (2 heads)
Humeral head: medial supracondylar ridge of humerus, common flexor tendon Ulnar head: medial side of coronoid process of ulna
33
Insertion of pronator teres
Middle of the lateral surface of radius
34
Innervation of pronator teres
Medial N (C6-7)
35
Action of pronator teres
Pronation, (assist) elbow flexion
36
Origin of Triceps brachii (long head)
Infraglenoid tubercle of scapula
37
Origin of Triceps brachii (lateral head)
Proximal portion of post humerus, sup to radial groove
38
Origin of Triceps brachii (medial head)
Inf 2/3 of Post humerus, inf to radial groove
39
Insertion of triceps brachii
All heads converge onto one tendon insert onto olecranon process of ulna
40
Innervation of triceps brachii
Radial N (C7-8)
41
Action of triceps
Elbow extension Extension and ADD at the shoulder joint (long heads only)
42
Origin of Anconeus Tips: supinators, small triangle muscle
Dorsal side of the lateral epicondyle of the humerus
43
Insertion of Anconeus Tips:, small triangle muscle
Olecranon process, and proximal 1/3 of post ulna
44
Innervation of Anconeus Tips: supinators, small triangle muscle
Radial N (C6-8)
45
Action of Anconeus Tips: supinators, small triangle muscle
Elbow extension, stabilize the ulna during FA pronation
46
Origin of Supinators (super hard)
Supinator crest, lateral epicondyle of humerus, RCL, annular ligament
47
Insertion of supinators
Anterolateral, post surfaces of proximal 1/3 of radius, distal to radial tuberosity
48
Innervation of supinator
Radial N -> post interosseous N (C5-6)
49
action of supinator
Supinate the FA in elbow flexion&extension
50
Origin of pronator quadratus (deep muscle)
Oblique ridge of the ant 1/4 of distal ulna
51
Insertion of pronator quadratus
Lateral border and ant 1/4 of distal radius
52
Innervation of pronator quadratus
ant interosseous N (C8-T1) a branch of Median N
53
Action of pronator quadratus
FA pronation (at radioulnar joint, pulling radius over ulna)
54
rock paper scissors ok sign test nerve
median N radial N ulnar N ant interosseous N (median)
55
thumbs up test nerve
radial N
56
special test: ligament stability tests (2)
MCL - valgus stress test LCL - varus stress test don't do the test when you know there's a dislocation!
57
test for latreal epicondylagia (tennis elbow) (3)
cozen's test maudsley's test grip strength test
58
test for medial epicondylagia (golfer's elbow)
golfer's elbow test
59
test for cubital tunnel syndrome (3)
tinels test forments test passive elbow flexion test
60
distal biceps rupture test
hook test
61