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SOPHIE'S ESA 2 > MSK Session 4- Anterior And Posterior Forearm > Flashcards

MSK Session 4- Anterior And Posterior Forearm Flashcards

1
Q

Name the four superficial anterior muscles of the forearm. (Lateral to medial)

A
  • pronator teres
  • flexor carpi radialis
  • palmaris longus
  • flexor carpi ulnaris
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2
Q

What is the action and innervation of pronator teres?

A

Action- pronates and flexes the forearm

Innervation- median nerve

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3
Q

What is action and innervation of flexor carpi radialis?

A

Action- flexion and abduction of the wrist

Innervation- median nerve

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4
Q

What is the action and innervation of palmaris longus?

A

Action- flexion of the wrist

Innervation- median nerve

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5
Q

What is the action and innervation of flexor carpi ulnaris?

A

Action- flexion and Adduction of the wrist

Innervation- ulnar nerve

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6
Q

What is the intermediate muscle of the anterior forearm?

What is its action and innervation?

A

Flexor digitorum superficialis
Action- flexion of the medial 4 digits at the proximal interphalangeal joint.
Innervation- median nerve

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7
Q

What are the 3 deep muscles of the anterior forearm?

A

Flexor digitorum profundus
Pronator quadratus
Flexor pollicis longus

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8
Q

What is the action and innervation of flexor digitorum profundus?

A

Action- flexion of the distal interphalangeal joints of the medial 4 digits.
Innervation- medial 1/2- ulnar nerve, rest- anterior interosseous nerve

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9
Q

What is the action and innervation of pronator quadratus?

A

Action- pronation

Innervation- anterior interosseous nerve

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10
Q

What is the action and innervation of flexor pollicis longus?

A

Action- flexion of the thumb

Innervation- anterior interosseous nerve

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11
Q

How many muscle layers are there in the posterior forearm?

A

3

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12
Q

What are the 6 superficial posterior forearm muscles? (Lateral to medial)

A 
Brachioradialis 
Extensor carpi radialis longus 
Extensor carpi radialis brevis 
Extensor digitorum 
Extensor digiti minimi 
Extensor carpi ulnaris
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13
Q

What is the action and innervation of extensor carpi radialis longus?

A

Action- extension and abduction of the wrist

Innervation- radial nerve

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14
Q

What is the action and innervation of extensor carpi radialis brevis?

A

Action- extension and abduction of the wrist

Innervation- deep branch of radial nerve

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15
Q

What is the action and innervation of the extensor digitorum?

A

Action- extension of the 4 medial digits at the metacarpophalangeal joints.
Innervation- deep branch of radial nerve

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16
Q

What is the action and innervation of extensor digit minimi?

A

Action- extension of the 5th digit at the metacarpophalangeal joint
Innervation- deep branch of radial

17
Q

What is the action and innervation of extensor carpi ulnaris?

A

Action- extension and adduction of the wrist.

Innervation- deep radial

18
Q

What are the two deep muscles of the posterior forearm? What are their actions and innervations?

A 
Supinator 
-action - supinates the forearm 
-innervation- deep radial nerve 
Extensor indicis 
-action - extension of the index finger 
-innervation- posterior interosseous nerve
19
Q

What are the 3 outcropping muscles of the deep layer of the posterior forearm? (Lateral to medial)

A
  • adductor pollicis longus
  • extensor pollicis brevis
  • extensor pollicis longus
20
Q

What is the action and innervation of abductor pollicis longus?

A

Action- abducts and extends thumb at carpometacarpal joint

Innervation- posterior interosseous nerve

21
Q

What is the action and innervation of extensor pollicis brevis?

A

Action- extends distal phalanx of thumb at interphalangeal joint
Innervation- posterior interosseous nerve

22
Q

What is the action and innervation of extensor pollicis longus?

A

Action- extends the proximal phalanx of the thumb at the metacarpophalangeal joint.
Innervation- posterior interosseous nerve

23
Q

What is the floor of the anatomical snuffbox? (2)

A

Scaphoid and trapezium

24
Q

What is the medial border of the anatomical snuffbox?

A

Extensor pollicis longus

25
Q

What is the lateral border of the anatomical snuffbox? (2)

A

Abductor pollicis longus and extensor pollicis brevis

26
Q

What runs through the anatomical snuffbox? (2)

A

Radial artery and nerve

27
Q

How many layers of muscles are there in the anterior forearm?

A

3

SOPHIE'S ESA 2 (74 decks)

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