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Anatomy > Antebrachial Extensors POINA > Flashcards

Antebrachial Extensors POINA Flashcards

1
Q

Extrinsic muscles: superficial layer

A

-Extensor carpi radialis longus and brevis
-Extensor carpi ulnaris
-Extensor digitorum
-Extensor digiti minimi

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2
Q

Extrinsic muscles: deep layer

A

-Extensor indicis
-Supinator

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3
Q

Extrinsic muscles: outcropping layer

A

-Abductor pollicis longus (apple)
-Extensor pollicis brevis (extra peanut butter)
-Extensor pollicis longus

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4
Q

Extensor Carpi Radialis Longus/Brevis Purposeful Action

A

Pickleball, painting a wall, stabilize wrist for strong grasp

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5
Q

Extensor Carpi Radialis Longus/Brevis Main Action

A

-Extend wrist (radiocarpal joint)
-Radial deviation (RC joint)
-ECRL active during fist clenching

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6
Q

Extensor Carpi Radialis Longus/Brevis Proximal Attachment

A

-L: lateral supraepicondylar ridge of humerus
-B: Lateral epicondyle of humerus (common extensor tendon)

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7
Q

Extensor Carpi Radialis Longus/Brevis Distal Attachment

A

-L: dorsal base of 2nd MC
B: dorsal base of 3rd MC

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8
Q

Extensor Carpi Radialis Longus/Brevis Innervation

A

Radial C6-C8

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9
Q

Extensor Digitorum Purposeful Action

A

Typing, swiping up on a smartphone

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10
Q

Extensor Digitorum Distal Attachment

A

Extensor expansions of medial four digits

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10
Q

Extensor Digitorum Main Action

A

Extend long digits (MCP primary, IP secondary)

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11
Q

Extensor Digitorum Proximal Attachment

A

Lateral epicondyle (common extensor tendon)

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12
Q

Extensor Digitorum Innervation

A

Deep branch of radial (C7-C8)

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13
Q

Extensor Digiti Minimi Purposeful Action

A

Drinking hot tea in England with queen

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14
Q

Extensor Digiti Minimi Main Action

A

Extend 5th digit (MCP primary, IP secondary)

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15
Q

Extensor Digiti Minimi Proximal Attachment

A

Lateral epicondyle (common extensor origin)

16
Q

Extensor Digiti Minimi Distal Attachment

A

Extensor expansion of 5th digit

17
Q

Extensor Digiti Minimi Innervation

A

Radial nerve (deep branch, C7-C8)

18
Q

Extensor Carpi Ulnaris Purposeful Action

A

Hammering, playing violin, writing

19
Q

Extensor Carpi Ulnaris Main Action

A

-Extend wrist (radiocarpal joint)
-Ulnar deviation (radiocarpal joint)
-Active during fist clenching

20
Q

Extensor Carpi Ulnaris Proximal Attachment

A

Lateral epicondyle (common extensor tendon)

21
Q

Extensor Carpi Ulnaris Distal Attachment

A

Base of 5th metacarpal

22
Q

Extensor Carpi Ulnaris Innervation

A

Radial nerve (C7-C8)

23
Q

Extensor Indicis Purposeful Action

A

Pointing at something

24
Q

Extensor Indicis Main Action

A

-Extend second digit (MCP joint)
-May assist to extend wrist (radiocarpal joint)

25
Q

Extensor Indicis Proximal Attachment

A

Posterior distal ulna and interosseous membrane

26
Q

Extensor Indicis Distal Attachment

A

Extensor expansion (2nd digit)

27
Q

Extensor Indicis Innervation

A

Radial (PIN) C7-C8

28
Q

Abductor Pollicis Longus Purposeful Action

A

Texting, picking up infant

29
Q

Abductor Pollicis Longus Main Action

A

-Radial deviation of thumb (CMC joint)
-Extend thumb (CMC joint)

30
Q

Abductor Pollicis Longus Proximal Attachment

A

Posterior proximal ulna, radius, and interosseous membrane

31
Q

Abductor Pollicis Longus Distal Attachment

A

Base of 1st MC

32
Q

Abductor Pollicis Longus Innervation

A

Radial nerve (PIN, C7-C8)

33
Q

Extensor Pollicis Brevis and Longus Purposeful Action

A

Giving thumbs up, flipping coin

34
Q

Extensor Pollicis Brevis and Longus Main Action

A

-Extend thumb (IP joint, EPL only)
-Extend thumb (MCP and CMC joints)

35
Q

Extensor Pollicis Brevis and Longus Proximal Attachment

A

-Longus: posterior ulna and interosseous membrane
-Brevis: posterior radius and interosseous membrane

36
Q

Extensor Pollicis Brevis and Longus Distal Attachment

A

-Longus: base of distal phalanx of thumb
-Brevis: base of proximal phalanx of thumb

37
Q

Extensor Pollicis Brevis and Longus Innervation

A

Radial (PIN, C7-C8)

Anatomy (15 decks)

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