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Anatomy - BPT04 > Myology of the arm and forearm > Flashcards

Myology of the arm and forearm Flashcards

1
Q

Biceps Brachii

A
  • Origin: Long head: Supraglenoid tubercle of the scapula.
    Short head: Coracoid process.
  • Insertion: Radial tuberosity, and bicipital aponeurosis
  • Action: Elbow: flexion, Forearm: supination.
    Long head: Shoulder abduction and flexion.
  • Innervation: Musculocutaneous nerve.
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2
Q

Brachialis

A
  • Origin: Anterior surface of the humerus, intermuscular
    septum.
  • Insertion: Ulnar tuberosity, Coronoid process.
  • Action: Elbow: flexion.
  • Innervation: Musculocutaneous nerve.
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3
Q

Triceps Brachii

A
  • Origin: Long head: infraglenoid tubercle of the scapula.
    Medial head: posterior surface of humerus, medial
    intermuscular septum.
    Lateral head: posterior surface of humerus, lateral
    intermuscular septum.
  • Insertion: Olecranon.
  • Action Elbow extension, and shoulder extension (Long
    head).
  • Innervation: Radial nerve.
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4
Q

Anconeus

A
  • Origin: Lateral epicondyle of the humerus.
  • Insertion: Olecranon.
  • Action: Elbow: extension.
  • Innervation: Radial nerve.
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5
Q

Pronator Teres

A
  • Origin: Humeral head: Medial epicondyle (common flexor
    tendon) .
  • Ulnar head: coronoid process of ulna.
  • Insertion: Lateral surface of the radius.
  • Action: Elbow: weakly flexion; Forearm: pronation.
  • Innervation: Median nerve.
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6
Q

Flexor Digitorum Superficialis

A
  • Origin: Humeroulnar head: medial epicondyle of the
    humerus (common flexor tendon).
    Radial head: Radial tuberosity.
  • Insertion: Middle phalanges II-V.
  • Action: Wrist: flexion; MCP and PIP II-V: flexion.
  • Innervation: Median nerve.
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7
Q

Flexor Digitorum profundus

A
  • Origin: Interosseus membrane, proximal 3/4 of the
    anterior surface of the ulna.
  • Insertion: Palmar surface of the distal phalanges II-V.
  • Action: Wrist, MCP, PIP, DIP II-V: flexion.
  • Innervation: Median and ulnar nerves.
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8
Q

Flexor Carpi Radialis

A
  • Origin: Medial epicondyle of the humerus (common flexor
    tendon).
  • Insertion: Base of the metacarpal II.
  • Action: Elbow flexion, forearm pronation. Wrist flexion and
    abduction.
  • Innervation: Median nerve.
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9
Q

Flexor Carpi Ulnaris

A
  • Origin: Humeral head: Medial epicondyle of the
    humerus (common flexor tendon).
    Ulnar head: Olecranon, and proximal 2/3
    of posterior surface of ulna.
  • Insertion: Hook of the hamate, base of metacarpal V,
    pisiformis.
  • Action: Wrist: flexion and adduction. Elbow: flexion.
  • Innervation: Ulnar nerve.
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10
Q

Palmaris Longus

A
  • Origin: Medial epicondyle of humerus.
  • Insertion: Palmar aponeurosis.
  • Action: Wrist: flexion by tightening the aponeurosis.
  • Innervation: Median nerve.
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11
Q

Brachioradialis

A
  • Origin: Lateral surface of the distal humerus,
    intermuscular septum.
  • Insertion: Styloid process of the radius.
  • Action: Elbow: flexion. Forearm: pronation/supination.
  • Innervation: Radial nerve.
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12
Q

Extensor Carpi Radialis Longus

A
  • Origin: Lateral supracondylar crest.
  • Insertion: Dorsal surface of metacarpal II.
  • Action: Wrist: extension and abduction Elbow: flexion.
  • Innervation: Radial nerve.
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13
Q

Extensor Carpi Radialis Brevis

A
  • Origin: Lateral epicondyle of the humerus.
  • Insertion: Dorsal surface of the metacarpal III.
  • Action: Wrist: extension and abduction. Elbow: flexion.
  • Innervation: Radial nerve.
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14
Q

Extensor Digitorum

A
  • Origin: Lateral epicondyle of humerus.
  • Insertion: Medial and distal phalanges II-V via dorsal
    aponeurosis.
  • Action: Wrist: extension. MCP, PIP, DIP: extension,
    abduction.
  • Innervation: Radial nerve.
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15
Q

Extensor Carpi Ulnaris

A
  • Origin: Common head: lateral epicondyle of humerus.
    Ulnar head: posterior surface of ulna.
  • Insertion: Base metacarpal V.
  • Action: Wrist: extension, adduction. Elbow: extension.
  • Innervation: Radial nerve.
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16
Q

Supinator

A
  • Origin: Supinator crest, Lateral epicondyle of humerus.
  • Insertion: Proximal third of radius.
  • Action: Radioulnar joint: supination.
  • Innervation: Radial nerve.
17
Q

Pronator Quadratus

A
  • Origin: Distal ¼ of anterior surface of the ulna.
  • Insertion: Distal ¼ of anterior surface of the radius.
  • Action: Radioulnar joint: pronation.
  • Innervation: Median nerve.
18
Q

Common Flexor Tendon

A

Attaches on the medial epicondyle of the humerus.
- Pronator Teres
- Flexor Carpi Radialis
- Flexor carpi Ulnaris
- Palmaris Longus
- Flexor digitorum superficialis
With the exception of Pronator Teres, all are wrist flexors.

19
Q

Common extensor tendon

A 
Attaches to the lateral epicondyle of the humerus.
- Extensor Carpi radialis brevis
- Extensor Digitorum 
- Extensor Digiti minimi
- Extensor Carpi ulnaris
All are wrist extensors.

Anatomy - BPT04 (28 decks)

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