OINA: Back/Shoulder/Triceps (Posterior forearm) Flashcards

1
Q

Superficial group

A
  • Extensor carpi radialis brevis
  • Extensor Digitorum
  • Extensor Digiti minimi
  • Extensor carpi ulnaris
  • Anconeus

These muscles posses a common tendon of origin, which is attached to the lateral epicondyle of the humerus

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2
Q

Deep Group

A
  • Supinator
  • Abductor Pollicis Longus
  • Extensor Pollicis brevis
  • Extensor Pollicis longus
  • Extensor Indicis
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3
Q

Blood supply

A
  • Posterior Interosseous artery

- Anterior Interosseous arteries

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4
Q

Nerve Supply

A

-All innervated by the Deep Branch of the Radial Nerve

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5
Q

Extensor Carpi Radialis Brevis

A

O: —-

I: Posterior surface of base of 3rd metacarpal bone

N: —–

A: Extends and abducts hand at wrist jt.

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6
Q

Extensor Digitorum

A

O: —-

I: Middle and distal phalanges of medial four fingers

N: —-

A: Extends fingers and hand

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7
Q

Anconeus

A

O: —-

I: Lateral surface of olecranon process of ulna

N: Radial Nerve

A: Assists triceps in extending forearm; stabilizes elbow joint; abducts ulna during pronation

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8
Q

Extensor digiti minimi

A

O: —-

I: Extensor expansion of little finger

N: —-

A: Extends metacarpal phalangeal joint of little finger

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9
Q

Extensor carpi ulnaris

A

O: —-

I: Base of 5th metacarpal bone

N: —-

A: Extends and adducts hand at wrist

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10
Q

Supinator

A

O: Lateral epicondyle of the humerus, the radical collateral ligament, the supinator crest of the ulna, and the radial collateral and annular ligaments.

I: Proximal portion of the anterolateral surface of the radius

N: deep branch of radial nerve C7,C8 and C5,C6

A: Supination of forearm

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11
Q

Abductor Pollicis Longus

A

O: Posterior surface of shafts of radius and ulna

I:Base of first metacarpal bone

N: —-

A: Abducts and extends thumb

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12
Q

Extensor Pollicis Brevis

A

O: Posterior surface of shaft of ulna

I: Base of distal phalanx of thumb

A: Extends distal phalanx of thumb

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13
Q

Extensor Indicis

A

O: Posterior surface of shaft of ulna

I: Extensor expansion of index finger

A: Extends metacarpophalengeal joint of index finger

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