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ESA 2 > MSK - Anterior forearm muscles > Flashcards

MSK - Anterior forearm muscles Flashcards

1
Q

Name the muscles of the superficial compartment of the anterior forearm (4)

A
  • Pronator teres
  • Flexor carpi radialis
  • Palmaris longus
  • Flexor carpi ulnaris
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2
Q

What is the origin of pronator teres?

A
  • Medial epicondyle

- Coronoid process of the ulna

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3
Q

Where does pronator teres insert?

A

Laterally to the mid-shaft of the radius

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4
Q

What is the innervation of pronator teres?

A

Median nerve (C6 and C7)

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5
Q

What are the actions of pronator teres?

A
  • Pronation of the forearm

- Weak flexion of the forearm at the elbow

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6
Q

What is the origin of flexor carpi radialis?

A

Medial epicondyle

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7
Q

Where does flexor carpi radialis insert?

A

Base of metacarpals 2 and 3

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8
Q

What is the innervation of flexor carpi radialis?

A

Median nerve (C6, C7)

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9
Q

What are the actions of flexor carpi radialis?

A
  • Flexion of the wrist

- Radial deviation at the wrist

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10
Q

What is the origin of palmaris longus?

A

Medial epicondyle

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11
Q

Where does palmaris longus insert?

A
  • Flexor retinaculum of the wrist

- Palmar aponeurosis

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12
Q

What is the innervation of palmaris longus?

A

Median nerve (C7, C8)

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13
Q

What are the actions of palmaris longus?

A
  • Flexion of the hand at the wrist

- Tenses palmar aponeurosis

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14
Q

What is the origin of flexor carpi ulnaris?

A
  • Medial epicondyle
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15
Q

Where does flexor carpi ulnaris insert?

A
  • Pisiform carpal bone
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16
Q

What is the innervation of flexor carpi ulnaris?

A
  • Ulnar nerve (C8, T1)
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17
Q

What are the actions of flexor carpi ulnaris?

A
  • Flexion of the hand at the wrist

- Ulnar deviation (adduction)

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18
Q

Name the muscle of the intermediate compartment of the forearm

A

Flexor digitorum superficialis

19
Q

What is the origin of flexor digitorum superficialis?

A
  • One head originates from medial epicondyle

- One head originates from the radius

20
Q

Where does flexor digitorum superficialis insert?

A
  • Splits into four tendons

- Inserts at middle phalanges of digits 2-5 (four fingers)

21
Q

What is the innervation of flexor digitorum superficialis?

A

Median nerve (C7, C8, T1)

22
Q

What are the actions of flexor digitorum superficialis?

A
  • Flexion of metacarpopharangeal joints
  • Flexion of proximal interphalangeal joints
  • Flexion of the hand at the wrist
23
Q

Name the THREE muscles of the deep compartment of the forearm

A
  • Flexor digitorum profundus
  • Flexor pollicus longus
  • Pronator quadratus
24
Q

What is the origin of flexor digitorum profundus?

A
  • Upper 3/4 of anteriomedial ulna

- And surrounding interosseous membrane

25
Q

Where does flexor digitorum profundus insert?

A
  • Splits into four tendons

- Distal phalanges of digits 2-5 (four fingers)

26
Q

What is the innervation of flexor digitorum profundus?

A
  • Medial half (digits 4&5) = ulnar nerve

- Lateral half (digits 2&3) = anterior interosseous branch of the median nerve

27
Q

What are the actions of flexor digitorum profundus?

A
  • Flexion of distal interphalangeal joints
  • Flexion of metacarpophalangeal joints
  • Flexion of the hand at the wrist
28
Q

What is the origin of flexor pollicus longus?

A
  • Anterior surface of the radius and surrounding membrane
29
Q

Where does flexor pollicus longus insert?

A

Base of the distal phalanx of the thumb

30
Q

What is the innvervation of flexor pollicus longus?

A

Anterior interosseous branch of the median nerve

31
Q

What are the actions of flexor pollicus longus?

A
  • Flexion of the interphalangeal joint of the thumb

- Flexion of the metacarpophalangeal joint of the thumb

32
Q

What is the origin of pronator quadratus?

A

Anterior surface of the ulna

33
Q

Where does pronator quadratus insert?

A

Anterior surface of the radius

34
Q

What is the innervation of pronator quadratus?

A

Anterior interosseous branch of the median nerve

35
Q

What are the actions of pronator quadratus?

A

Pronation of the forearm

36
Q

What is the blood supply of pronator teres?

A
  • Ulnar artery

- Anterior recurrent ulnar artery

37
Q

What is the blood supply of flexor carpi radialis?

A

Ulnar artery

38
Q

What is the blood supply of palmaris longus?

A

Ulnar artery

39
Q

What is the blood supply of flexor carpi ulnaris?

A

Ulnar artery

40
Q

What is the blood supply of flexor digitorum superficialis?

A

Ulnar artery

41
Q

What is the blood supply of flexor digitorum profundus?

A

Ulnar and anterior interosseous arteries

42
Q

What is the blood supply of flexor pollicus longus?

A

Anterior interosseous artery

43
Q

What is the blood supply of pronator quadratus?

A

Anterior interosseous artery

ESA 2 (63 decks)

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