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Gross Anatomy Muscle Attachments > Muscles of the Upper Extremity: Extensor-Supinator Compartment of the Foremarm > Flashcards

Muscles of the Upper Extremity: Extensor-Supinator Compartment of the Foremarm Flashcards

1
Q

Brachioradialis Proximal Attachment

A

Proximal 2/3 of the lateral supracondylar ridge of the humerus

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2
Q

Brachioradialis Distal Attachment

A

Styloid process of the radius

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3
Q

Brachioradialis Innervation

A

Radial n. [C5,*C6,C7]

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4
Q

Brachioradialis Action

A

Flexes the elbow
Assists with:
-Forearm pronation and supination against resitance

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5
Q

Extensor Carpi Radialis Longus Proximal Attachment

A

Distal third of lateral supracondylar ridge of humerus

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6
Q

Extensor Carpi Radialis Longus Distal Attachment

A

Bases of metacarpal II

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7
Q

Extensor Carpi Radialis Longus Innervation

A

Radial n. [*C6,C7]

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8
Q

Extensor Carpi Radialis Longus Action

A

Extends the wrist
Abducts the wrist
Assists with:
-Elbow flexion

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9
Q

Extensor Carpi Radialis Brevis Proximal Attachment

A

Common extensor tendon at the lateral epicondyle of the humerus

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10
Q

Extensor Carpi Radialis Brevis Distal Attachment

A

Base of metacarpal III

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11
Q

Extensor Carpi Radialis Brevis Innervation

A

Radial n. [*C6,C7]

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12
Q

Extensor Carpi Radialis Brevis Action

A

Extends the wrist
Abducts the wrist
Assists with:
-Elbow flexion

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13
Q

Extensor Digitorum Proximal Attachment

A

Common extensor tendon at the lateral epicondyle of the humerus

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14
Q

Extensor Digitorum Distal Attachment

A

Dorsal surfaces of digits II-V via extensor hood (by central slip to the base of the middle phalanx, and by lateral bands to the base of the distal phalanx)

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15
Q

Extensor Digitorum Innervation

A

Posterior Interosseous n. (Radial) [*C7,C8]

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16
Q

Extensor Digitorum Action

A

Extends the MCP, PIP, & DIP joints of digits 2-5
Assists with:
-Wrist extension

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17
Q

Extensor Carpi Ulnaris Proximal Attachment

A

Common extensor tendon at the lateral epicondyle of humerus, and posterior border of ulna

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18
Q

Extensor Carpi Ulnaris Distal Attachment

A

Metacarpal V

19
Q

Extensor Carpi Ulnaris Innervation

A

Posterior Interosseous n. (Radial) [*C7,C8]

20
Q

Extensor Carpi Ulnaris Action

A

Extends the wrist

Adducts the wrist

21
Q

Extensor Digiti Minimi Proximal Attachment

A

Common extensor tendon at the lateral epicondyle of the humerus

22
Q

Extensor Digiti Minimi Distal Attachment

A

Extensor hood of digit V with ED tendon

23
Q

Extensor Digiti Minimi Innervation

A

Posterior Interosseous n. (Radial) [*C7,C8]

24
Q

Extensor Digiti Minimi Action

A

Extends MCP, PIP, & DIP joints of the little finger

25
Q

Supinator Proximal Attachment

A

Lateral epicondyle of the humerus radial collateral ligament, annular ligament, and supinator crest of the ulna

26
Q

Supinator Distal Attachment

A

Lateral surface of the proximal third of the radius

27
Q

Supinator Innervation

A

Radial n. [*C6,C7]

28
Q

Supinator Action

A

Supinates the forearm

29
Q

Abductor Pollicis Longus Proximal Attachment

A

Midway along the posterior surface of the radius and ulna and interosseous membrane

30
Q

Abductor Pollicis Longus Distal Attachment

A

Base of metacarpal I

31
Q

Abductor Pollicis Longus Innervation

A

Posterior Interosseous n. (Radial) [*C7,C8]

32
Q

Abductor Pollicis Longus Action

A 
Abducts CMC joint of the thumb
Extends CMC joint of the thumb
Assists with:
-Wrist abduction
-Wrist flexion
33
Q

Extensor Pollicis Brevis Proximal Attachment

A

Posterior surface of the distal radius

34
Q

Extensor Pollicis Brevis Distal Attachment

A

Base of the proximal phalanx of the thumb

35
Q

Extensor Pollicis Brevis Innervation

A

Posterior Interosseous n. (Radial) [*C7,C8]

36
Q

Extensor Pollicis Brevis Action

A

Extends CMC & MCP joint of the thumb
Abducts CMS joint of the thumb
Assists with:
-Wrist abduction

37
Q

Extensor Pollicis Longus Proximal Attachment

A

Middle of the posterior surface of the ulna

38
Q

Extensor Pollicis Longus Distal Attachment

A

Base of the distal phalanx of the thumb

39
Q

Extensor Pollicis Longus Innervation

A

Posterior Interosseous n. (Radial) [*C7,C8]

40
Q

Extensor Pollicis Longus Action

A

Extends CMC, MCP, & IP joints of the thumb
Assists with:
-Wrist abduction

41
Q

Extensor Indicis Proximal Attachment

A

Posterior surface of the ulna, distal to the origin of extensor pollicis longus

42
Q

Extensor Indicis Distal Attachment

A

Extensor hood of digit I with ED tendon

43
Q

Extensor Indicis Innervation

A

Posterior Interosseous n. (Radial) [*C7,C8]

44
Q

Extensor Indicis Action

A

Extends MCP, PIP, & DIP joints of the index finger
Adducts MCP joint of the index finger
Assists with:
-Wrist extension

Gross Anatomy Muscle Attachments (21 decks)

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