Lecture 7: The Arm & Forearm Flashcards

1
Q

Biceps Brachii long head OIA

A

O: supraglenoid tubercle of scapula

I: radial tuberosity

A: flexes/supinates forearm at elbow

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2
Q

Biceps Brachii short head OIA

A

O: caracoid process

I: bicipital aponeruosis & fascia of the medial forearm

A: flexes/supinates forearm at elbow

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3
Q

Brachialis OIA

A

O: body of humerus

I: ulnar tuberosity

A: flexes the forearm at the elbow

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4
Q

Triceps Brachii long head OIA

A

O: infraglenoid tubercle of the scapula

I: posterior olecranon process of the ulna

A: extends forearm at elbow, extends arm at shoulder

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5
Q

Triceps Brachii lateral head OIA

A

O: body of the humerus, superior to the radial groove

I: posterior olecranon process

A: extends the forearm at the elbow

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6
Q

Triceps brachii medial head OIA

A

O: body of the humerus, inferior to the radial groove

I: posterior olecranon process

A: extends the forearm at the elbow

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7
Q

flexors and pronators are found in the

A

anterior forearm

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8
Q

extensors and supinators are found in the

A

posterior forearm

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9
Q

Supination definition

A

palm up

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10
Q

Pronation definition

A

palm down

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11
Q

Supination muscles

A
  • supinator
  • biceps brachii
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12
Q

Pronation muscles

A
  • pronator teres
  • pronator quadratus
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13
Q

Pronator teres OIA

A

O: medial epicondyle of humerus

I: lateral surface of radius

A: pronates the forearm at elbow

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14
Q

Flexor carpi radialis OIA

A

O: medial epicondyle of humerus

I: base of the 2nd metacarpal

A: flexes hand at wrist, abducts hand at wrist

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15
Q

Palmaris longus OIA

A

O: medial epicondyle of humerus

I: palmar aponeurosis

A: flexes hand at wrist, tenses palmar aponeurosis

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16
Q

Flexor carpi ulnaris OIA

A

O: medial epicondyle of humerus, olecranon of ulna

I: base of 5th metacarpal, hamate/pisiform bones

A: flexes hand at wrist, adducts hand at wrist

17
Q

Flexor digitorum superficialis OIA

A

O: medial epicondyle of humerus, coronoid process of ulna, upper surface of the radius

I: middle phalanges of the hand

A: flexes middle phalanges, flexes hand at wrist

18
Q

Flexor digitorum profundus OIA

A

O: anterior surface of the ulna, interosseous membrane

I: distal phalanges of digits 2-5

A: flexes hand at wrist, flexes fingers

19
Q

Brachioradialis OIA

A

O: lateral supracondylar ridge of the humerus

I: styloid process of the radius

A: flexes arm at the elbow, pronates arm at the elbow

20
Q

Extensor carpi longus OIA

A

O: lateral supracondylear ridge of humerus

I: base of the 2nd metacarpal

A: extends hand at wrst, abducts hand at wrist

21
Q

Extensor carpi radialis brevis OIA

A

O: lateral epicondyle of humerus

I: base of 3rd metacarpal

A: extends hand at wrist, abducts hand at wrist

22
Q

Extensor digiti minimi OIA

A

O: lateral epicondyle of humerus

I: dorsal aponeurosis of 5th digit

A: extends 5th digit, contributes to extension of hand at wrist

23
Q

Extensor carpi ulnaris OIA

A

O: lateral epicondyle of humerus, posterior surface of ulna

I: base of 5th metacarpal

A: extends hand at wrst, adducts hand at wrist

24
Q

Anconeus OIA

A

O: lateral epicondyle of the humerus

I: olecranon of the ulna

A: extends the forearm at elbow, stablizers in pronation/supination

25
Supinator OIA
O: lateral epicondyle of humerus, supinator crest of ulna I: posterior surface of radius A: supinates forearm at elbow
26
Extensor Indicis OIA
O: posterior surface of ulna, interosseous membrane I: distal aponeurosis of 2nd digit A: extends the 2nd digit, extends hand at wrist
27
Coracobrachialis Action
- Flexes/Adducts arm at GHJ - Interally rotates arm at GHJ
28
Teres Major Action
Internal rotation/Adduction/Extension of the arm at the GHJ
29
Supraspinatus Action
External rotation/Abduction of the arm at the GHJ
30
Infraspinatus action
external rotation of the arm at the GHJ
31
Teres Minor Action
external roation of the arm at the GHJ
32
Subscapularis Action
internal rotation of the arm at the GHJ
33
Rotator Cuff Muscles and combined action
- subscapularis - supraspinatus - infraspinatus - teres minor CIRCUMDUCTION