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Anatomy > Posterior Forearm Muscles > Flashcards

Posterior Forearm Muscles Flashcards

1
Q

Brachioradialis Origin

A

Proximal portion of lateral supracondylar ridge of humerus and adjacent lateral intermuscular septum

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2
Q

Brachioradialis Insertion

A

Lateral side, distal end of the radius, proximal to the radial styloid process

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3
Q

Brachioradialis Innervation

A

Radial nerve (C5/C6)

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4
Q

Brachioradialis Action

A

Elbow flexion, with forearm in mid-supination / Mid-pronation

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5
Q

Extensor Carpi Radialis Longus Origin

A

Distal portion of supracondular ridge of humerus bone and lateral intermuscular septum

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6
Q

Extensor Carpi Radialis Longus Insterion

A

Doral surface, base of MC #2

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7
Q

Extensor Carpi Radialis Longus Innervation

A

Radial Nerve (C6/C7)

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8
Q

Extensor Carpi Radialis Longus Action

A

Wrist extension and radial deviation

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9
Q

Extensor Carpi Radialis Brevis Origin

A

Lateral Epicondyle of humerus through Common Extensor Tendon (CET); Lateral/radial collateral ligament of elbow; and adjacent intermuscular septum

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10
Q

Extensor Carpi Radialis Brevis Insertion

A

Dorsal surface, base of MC #2 and #3

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11
Q

Extensor Carpi Radialis Brevis Innervation

A

Deep Radial Nerve (C7/C8)

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12
Q

Extensor Carpi Radialis Brevis Action

A

Wrist extension, radial deviation

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13
Q

Extensor Digitorum Origin

A

Lateral epicondyle through common extensor tendon (CET) and adjacent intermuscular septum

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14
Q

Extensor Digitorum Insertion

A

Dorsal Digital Expansion (DDE) of fingers 2-5 (essentially inserting on the dorsal aspect of bases of middle and distal phalanges)

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15
Q

Extensor Digitorum Innervation

A

Posterior Interosseous Nerve (C7/C8)

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16
Q

Extensor Digitorum Action

A

Extension of fingers 2-5, wrist extension

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17
Q

Extensor Digiti Minimi Origin

A

Lateral epicondyle of humerus by common extensor tendon (CET) and adjacent intermuscular septum

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18
Q

Extensor Digiti Minimi Insertion

A

Dorsal Digital Expansion (DDE) of little finger-medial side

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19
Q

Extensor Digiti Minimi Innervation

A

Posterior Interosseous Nerve (C7/C8)

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20
Q

Extensor Digiti Minimi Action

A

Extension of 5th finger, assists with wrist extension

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21
Q

Extensor Carpi Ulnaris Origin

A

Humeral Head: Lateral Epicondyle of the humerus via Common Extensor Tendon (CET)

Ulnar Head: Posterior border of ulna by aponeurosis

22
Q

Extensor Carpi Ulnaris Insertion

A

Base of MC #5, Medial side

23
Q

Extensor Carpi Ulnaris Innervation

A

Posterior interosseous Nerve (C7/C8)

24
Q

Extensor Carpi Ulnaris Action

A

Wrist extension, Ulnar deviation

25
Q

Aconeus Origin

A

Posterior surface of the lateral epicondyle of the humerus

26
Q

Aconeus Insertion

A

Lateral side of the olecranon process and upper posterior surface of ulna

27
Q

Aconeus Innervation

A

Radial nerve (C6/C7/C8)

28
Q

Aconeus Action

A

Abduction of ulna during pronation of forearm; assists with forearm extention

29
Q

Supinator Origin

A

Humeral Head: Lateral epicondyle of the humerus bone by Common Extensor Tendon; Radial collateral ligament and annular ligament of radius

Ulnar head: Supinator crest of the ulna

30
Q

Supinator Insertion

A

Lateral surface; Proximal 1/3 radius

31
Q

Supinator Innervation

A

Posterior Interosseous Nerve (C6/7)

32
Q

Supinator Action

A

forearm supination

33
Q

ABductor Pollicis Longus Origin

A

Posterior surface of ulna and radius and interosseous membrane (upper portion of ulna and middle 1/3 of radius)

34
Q

ABductor Pollicis Longus Insertion

A

Base of MC #1, lateral side

35
Q

ABductor Pollicis Longus Innervation

A

Posterior Interosseous Nerve - PIN (C7/C8)

36
Q

ABductor Pollicis Longus Action

A

Abduction of thumb at CM joint; Assists with thumb extension and radial deviation

37
Q

Extensor Pollicis Brevis Origin

A

Posterior surface of radius (below Abductor pollicis longus) and interosseous membrane.

38
Q

Extensor Pollicis Brevis Insertion

A

Base of proximal phalanx of thumb, dorsal surface

39
Q

Extensor Pollicis Brevis Innervation

A

Posterior Interosseous Nerve ( C7/C8)

40
Q

Extensor Pollicis Brevis Action

A

Extension of the thumb (at MP and CM joints) assists with wrist radial deviation.

41
Q

Extensor Pollicis Longus Origin

A

Posterior surface, middle 1/3 of ulna and interosseous membrane

42
Q

Extensor Pollicis Longus Insertion

A

Base of the distal phalanx of the thumb, dorsal side

43
Q

Extensor Pollicis Longus Innervation

A

Posterior Interosseous Nerve, (C7/C8)

44
Q

Extensor Pollicis Longus Action

A

Thumb extension at Ip, MP, and CM joints, rotates thumb laterally so pad is out.

45
Q

Extensor Indicis Origin

A

Posterior surface of the ulna (distal to the EPL) and interosseous membrane

46
Q

Extensor Indicis Insertion

A

Dorsal digital expansion. (DDE) of the index finger, medial side

47
Q

Extensor Indicis Innervation

A

Posterior interosseous nerve (C7/C8)

48
Q

Extensor Indicis Action

A

Extension of the index finger

49
Q

Superficial Posterior Forearm Muscles

A
  1. Brachioradialis
  2. Extensor Carpi Radialis Longus
  3. Extensor Carpi Radialis Brevis
  4. Extensor Digitorum
  5. Extensor Digiti Minimi
  6. Extensor Carpi Ulnaris
  7. Anconeous
50
Q

Deep Posterior Forearm Muscles

A
  1. Abductor pollicis Longus
  2. Extensor pollicis Brevis
  3. Extensor Pollicis Longus
  4. Supinator muscle
  5. Extensor indicis

Anatomy (18 decks)

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