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Gross Anatomy > Muscles of the Forearm > Flashcards

Muscles of the Forearm Flashcards

1
Q

Pronator teres

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Coronoid process of ulna and medial epicondyle
  • Distal Attachment: Radius
  • Action: Pronates forearm
  • Innervation: Median nerve
  • Blood Supply: Anterior ulnar recurrent artery
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2
Q

Flexor carpi radialis

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Medial humeral epicondyle
  • Distal Attachment: Base of 2nd metacarpal
  • Action: Flexes and abducts hand at wrist (radia deviation)
  • Innervation: Median nerve
  • Blood Supply: Radial artery
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3
Q

Palmaris longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Medial epicondyle of humerus
  • Distal Attachment: Flexor retinaculum, palmar aponeurosis
  • Action: Flexes hand at wrist and tenses palmar aponeurosis
  • Innervation: Median nerve
  • Blood Supply: Posterior ulnar recurrent artery
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4
Q

Flexor carpi ulnaris

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Olecranon process of ulna
  • Distal Attachment: Pisiform, hook of hamate, 5th metacarpal
  • Action: Flexes and adducts hand at wrist (ulnar deviation)
  • Innervation: Ulnar nerve
  • Blood Supply: Posterior ulnar recurrent artery
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5
Q

Flexor digitorum superficialis

Proximal Attachment

Distal Attachment

Action

Innervation

Bloody Supply

A
  • Proximal Attachment: Medial humeral epicondyle
  • Distal Attachment: Middle phalanges of digits 2-5
  • Action: Flexes middle phalanx at proximal interphalangeal (PIP) joint of digits 2-5
  • Innervation: Median nerve
  • Bloody Supply: Ulnar and radial arteries
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6
Q

Flexor digitorum profundus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Anterior ulna and interosseus membrane
  • Distal Attachment: Distal phalanges of digits 2-5
  • Action: Flexes distal phalanx at distal interphalangeal (DIP) joint of digits 2-5
  • Innervation:
    • Lateral part (digits 2-3) - median nerve
    • Medail part (digits 4-5) - ulnar nerve
  • Blood Supply: Anterior interosseus artery, ulnar artery
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7
Q

Flexor pollicis longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Anterior radius
  • Distal Attachment: Base of distal phalanx of thumb
  • Action: Flexes 1st digit (thumb)
  • Innervation: Median nerve
  • Blood Supply: Anterior interosseus artery
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8
Q

Pronator quadratus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Anterior ulna
  • Distal Attachment: Anterior radius
  • Action: Pronates forearm
  • Innervation: Median nerve
  • Blood Supply: Anterior interosseus artery
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9
Q

Brachioradialus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Lateral supracondylar ridge of humerus
  • Distal Attachment: Distal radius
  • Action: Flexes forearm
  • Innervation: Radial nerve
  • Blood Supply: Radia recurrent artery
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10
Q

Extensor carpi radialis longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Lateral supracondylar ridge of humerus
  • Distal Attachment: Dorsal aspect of 2nd metacarpal
  • Action: Extend and abduct hand at wrist
  • Innervation: Radial nerve
  • Blood Supply: Radial artery, radial recurrent artery
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11
Q

Extensor carpi radialis brevis

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Lateral epicondyle of humerus
  • Distal Attachment: Dorsal aspect of base of 3rd metacarpal
  • Action: Extend and abduct hand at wrist
  • Innervation: Deep branch of radial nerve
  • Blood Supply: Radial artery, radial recurrent artery
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12
Q

Extensor digitorum

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Lateral epicondyle of humerus
  • Distal Attachment: Extensor expansion of digits 2-5
  • Action: Extends digits 2-5 at metacarpophalangeal joints
  • Innervation: Posterior interosseus nerve
  • Blood Supply: Posterior interosseus artery
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13
Q

Extensor digit minimi

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Lateral epicondyle of humerus
  • Distal Attachment: Extensor expansion of digit 5
  • Action: Extends digit 5 at metacarpophalangeal joint
  • Innervation: Posterior interosseus nerve
  • Blood Supply: Posterior interosseus artery
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14
Q

Extensor carpi ulnaris

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Lateral epicondyle of humerus
  • Distal Attachment: Dorsal aspect of base of 5th metacarpal
  • Action: Extends and adducts hand at wrist
  • Innervation: Posterior interosseus nerve
  • Blood Supply: Posterior interosseus artery
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15
Q

Supinator

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Lateral epicondyle of humerus
  • Distal Attachment: Proximal radius
  • Action: Supinates forearm
  • Innervation: Radial nerve (deep branch)
  • Blood Supply: Radial recurrent artery, posterior interosseus arteries
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16
Q

Abductor pollicis longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Posterior ulna and radius
  • Distal Attachment: Base of 1st metacarpal
  • Action: Abducts thumb
  • Innervation: Posterior interosseus nerve
  • Blood Supply: Posterior interosseus artery
17
Q

Extensor pollicis brevis

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Posterior radius
  • Distal Attachment: Base of proximal phalanx of thumb
  • Action: Extends proximal phalanx of thumb at metacarpophalangeal joint
  • Innervation: Posterior interosseus nerve
  • Blood Supply: Posterior interosseus artery
18
Q

Extensor pollicis longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Posterior ulna
  • Distal Attachment: Base of distal phalanx of thumb
  • Action: Extends distal phalanx of thumb
  • Innervation: Posterior interosseus nerve
  • Blood Supply: Posterior interosseus artery
19
Q

Extensor indicis

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Posterior ulna
  • Distal Attachment: Extensor expansion of digit 2
  • Action: Extends digit 2
  • Innervation: Posterior interosseus nerve
  • Blood Supply: Posterior interosseus artery
20
Q

Anatomical Snuffbox

Lateral Boundary

Medial Boundary

Contents

Common Injury

A
  • Lateral Boundary:
    • Abductor pollicis longus
    • Extensor pollicis brevis
  • Medial Boundary: Extensor pollicis longus
  • Contents:
    • Radial artery
    • Base of 1st metacarpal
    • Scaphoid and trapezium
    • Radial styloid process
  • Common Injury: Scaphoid is most commonly fractured carpal bone. Yields tenderness over snuffbox.
21
Q

Cubital Fossa

Medial Boundary

Lateral Boundary

Superior Boundary

Floor

Roof

Contents

A
  • Medial Boundary: Pronator teres
  • Lateral Boundary: Brachioradialis
  • Superior Boundary: Line connecting medial and lateral humeral epicondyles
  • Floor: Brachialis and supinator muscles
  • Roof: Bicipital aponeurosis (median cubital vein crosses this superficially)
  • Contents:
    • Biceps brachii tendon
    • Brachial artery and vein
    • Proximal radial and ulnar arteries and veins
    • Median and radial nerves

Gross Anatomy (21 decks)

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