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Anatomy > Posterior Forearm Muscles > Flashcards

Posterior Forearm Muscles Flashcards

1
Q

What is the Location of Supinator

A

Floor of the Cubital Fossa

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2
Q

What are the Origins of the Supinator

A

Lateral Epicondyle, Radial Collateral and Anular Ligament, Proximal Ulna (Supinator fossa and Supinator crest)

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3
Q

What are the Insertions of Supinator

A

Posterior, Lateral and Anterior surfaces of the Proximal Radius

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4
Q

What is the Action of Supinator

A

Primary Supinator of the Forearm

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5
Q

What is the Innervation of Supinator

A

Radial Nerve

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6
Q

What is the Location of Extensor Carpi Ulnaris

A

Most Medial of the group, Tendon lies just Medial to the Ulnar Styloid Process at the Wrist

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7
Q

What are the Origins of Extensor Carpi Ulnaris

A

Humeral Head - CET

Ulnar Head - Posterior Border of the Ulna

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8
Q

What is the Insertion of Extensor Carpi Ulnaris

A

Base of the 5th Metacarpal

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9
Q

What are the Actions of Extensor Carpi Ulnaris

A

Extends wrist (with ECRL and ECRB) and Adducts the Wrist (with FCU)

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10
Q

What is the Innervation of Extensor Carpi Ulnaris

A

Radial Nerve

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11
Q

What is the Location of Abductor Pollicis Longus

A

Tendon travels in a common synovial sheath with Extensor Pollicis Brevis

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12
Q

What are the Origins of Abductor Pollicis Longus

A

Posterior surface of the Radius, Ulna and Interosseous Membrane

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13
Q

What is the Insertion of Abductor Pollicis Longus

A

Base of 1st Metacarpal

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14
Q

What are the Actions of Abductor Pollicis Longus

A

Abducts thumb, Assists with wrist and Thumb Extension

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15
Q

What is the Innervation of Abductor Pollicis Longus

A

Radial Nerve

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16
Q

What is the Location of Extensor Pollicis Longus

A

Tendon travels Medial to Lister’s Tubercle

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17
Q

What are the Origins of Extensor Pollicis Longus

A

Posterior surface of Ulna and Interosseous Membrane

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18
Q

What is the Insertion of Extensor Pollicis Longus

A

Base of Distal Phalanx of Thumb (only extensor muscle to attach here)

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19
Q

What are the Actions of Extensor Pollicis Longus

A

Extends the IP, and MCP joints of Thumb, Extends Wrist

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20
Q

What is the Innervation of Extensor Pollicis Longus

A

Radial Nerve

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21
Q

What is the Location of Extensor Carpi Radialis Brevis

A

Slightly Medial and Deep to ECRL, Lateral to Lister’s Tubercle on Radius

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22
Q

What is the Origin of Extensor Carpi Radialis Brevis

A

CET (Lateral Epicondyle of Humerus)

23
Q

What is the Insertion of Extensor Carpi Radialis Brevis

A

Base of the 3rd Metacarpal

24
Q

What are the Actions of Extensor Carpi Radialis Brevis

A

Extends and Abducts (radially deviates) the Wrist with ECRL

25
Q

What is the Innervation of Extensor Carpi Radialis Brevis

A

Radial Nerve

26
Q

What is the Location of Extensor Indicis

A

Medial to Extensor Pollicis Longus; Tendon travels Medial to Extensor Digitorum Tendon of the 2nd Digit

27
Q

What are the Origins of Extensor Indicis

A

Posterior surface of Ulna and Interosseous Membrane

28
Q

What is the Insertion of Extensor Indicis

A

Extensor expansion of the 2nd digit

29
Q

What are the Actions of Extensor Indicis

A

Extends MCP, PIP and DIP Joints of the 2nd Digit, Assists Wrist Extension

30
Q

What is the Innervation of Extensor Indicis

A

Radial Nerve

31
Q

What is the Location of Extensor Digiti Minimi

A

Between Extensor Carpi Ulnaris and Extensor Digitorum

32
Q

What is the Origin of Extensor Digiti Minimi

A

CET

33
Q

What is the Insertion of Extensor Digiti Minimi

A

Extensor Expansion of Digit 5

34
Q

What are the Actions of Extensor Digiti Minimi

A

Extends the 5th Digit at the MCP, PIP and DIP Joints

35
Q

What is the Innervation of Extensor Digit Minimi

A

Radial Nerve

36
Q

What is the Location of Extensor Digitorum

A

Medial to Extensor Carpi Radialis Brevis

37
Q

What is the Origin of Extensor Digitorum

A

CET, Lateral Supracondylar Ridge on Humerus

38
Q

What is the Insertion of Extensor Digitorum

A

By 4 Tendons (1 for each finger) that attach to the Extensor Expansion of Digits 2-5

39
Q

What are the Actions of Extensor Digitorum

A

Primary Extensor of Fingers, Extends Wrist, Abducts Fingers

40
Q

What is the Innervation of Extensor Digitorum

A

Radial Nerve

41
Q

What is the Location of Extensor Carpi Radialis Longus

A

Tendon lies Lateral to Lister’s Tubercle on the Radius and ECRB

42
Q

What is the Origin of Extensor Carpi Radialis Longus

A

Lateral Supracondylar Ridge of the Humerus (inferior to Brachioradialis)

43
Q

What is the Insertion of Extensor Carpi Radialis Longus

A

Base of 2nd Metacarpal

44
Q

What are the Actions of Extensor Carpi Radialis Longus

A

Extends and Abducts the Wrist

45
Q

What is the Innervation of Extensor Carpi Radialis Longus

A

Radial Nerve

46
Q

What is the Origin of Brachioradialis

A

Proximal 2/3 of Lateral Supracondylar Ridge of the Humerus

47
Q

What is the Insertion of Brachioradialis

A

Lateral aspect of Distal Radius

48
Q

What is the Action of Brachioradialis

A

Flexion of the Forearm at the Elbow when Forearm is semi-Pronated

49
Q

What is the Innervation of Brachioradialis

A

Radial Nerve

50
Q

What is the Location of Extensor Pollicis Brevis

A

Intermediate to EPL and APL

51
Q

What are the Origins of Extensor Pollicis Brevis

A

Posterior surface of Distal Radius and Interosseous Membrane

52
Q

What is the Insertion of Extensor Pollicis Brevis

A

Base of Proximal Phalanx of Thumb

53
Q

What are the Actions of Extensor Pollicis Brevis

A

Extends Thumb at MCP Joint, Extends Wrist

54
Q

What is the Innervation of Extensor Pollicis Brevis

A

Radial Nerve

Anatomy (30 decks)

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