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CRNA- Anatomy > Muscles of Forearm > Flashcards

Muscles of Forearm Flashcards

1
Q

Boundaries of Cubital Fossa

A

Superiorly: an imaginary line connecting medial and lateral epicondyles

Medially: pronator teres

Laterally: brachioradialis

Floor: brachialis and supinator

Roof: cubital fascia and skin

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2
Q

Cubital Fossa Contents

A
  1. Brachial artery
  2. Biceps tendon
  3. Median nerve
  4. Radial nerve
  5. Median Cubital vein
  6. Medial and lateral cutaneous nerves
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3
Q

Superficial layer of Flexor Region

A
  1. Pronator teres
  2. Flexor Carpi radialis
  3. Palmaris longus
  4. Flexor carpi unlaris
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4
Q

Intermediate layer of Flexor Region

A
  1. Flexor digitorum superficialis
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5
Q

Deep layer of Flexor Region

A
  1. Flexor digitorum profundus
  2. Flexor pollicis longus
  3. Pronator quadratus
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6
Q

Pronator teres

A

Proximal: coronoid process of ulna

Distal: lateral surface of radius

Innervation: median nerve

Main action: pronates forearm

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7
Q

Flexor carpi radialis

A

Proximal: medial epicondyle of humerus

Distal: base of 2nd & 3rd metacarpals

Innervation: median nerve

Main action: flex ion and abduction of hand

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8
Q

Palmaris longus

A

Proximal: medial epicondyle

Distal: palmar aponeurosis

Innervation: median nerve

Main action: hand flexion and tenses palmar aponeurosis

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9
Q

Flexor carpi ulnaris

A

Proximal: olecranon process

Distal: pisiform, hook of hamate, 5th metacarpal

Innervation: ulnar nerve

Main action: adduction and flexion of hand at wrist

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10
Q

Flexor digitorum superficialis

A

Proximal: medial epicondyle, coronoid process of ulna and anterior radius

Distal: middle phalanges of medial four fingers (2-5)

Innervation: median nerve

Main action: flexion of proximal inter-phalangeal (PIP) joints of fingers 2-5

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11
Q

Flexor digitorum profundus

A

Proximal: ulna and interosseous membrane

Distal: base of digital phalanges of fingers (2-5)

Innervation: lateral part (finger 2,3) by median nerve; medial part (finger 4,5) by ulnar nerve [median nerve lies b/w FDS & FDP]

Main action: flexion of distal inter-phalangeal (DIP) joints of fingers 2-5

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12
Q

Flexor pollicis longus

A

Proximal: radius and interosseous membrane

Distal: base of distal phalanx of thumb

Innervation: anterior interosseous nerve (branch of median nerve)

Main action: thumb flexion

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13
Q

Pronator quadratus

A

Proximal: distal ulna

Distal: distal radius

Innervation: anterior interosseous nerve (branch of median)

Main action: probate forearm

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14
Q

Brachioradialis

A

Proximal: lateral supracondylar ridge of humerus

Distal: stylus process of radius

Innervation: radial nerve

Main action: weak flexion of elbow joint

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15
Q

Extensor carpi radialis longus and brevis

A

Proximal: lateral supracondylar ridge of humerus (longus) and laterally epicondyle (brevis)

Distal: base of 2nd (longus) and 3rd (brevis) metacarpal

Innervation: radial nerve

Main action: extend and abduction wrist joint

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16
Q

Extensor digitorum

A

Proximal: lateral epicondyle of humerus

Distal: extensor expansion of the medial four fingers 2-5

Innervation: posterior interosseous nerve (branch of radial nerve)

Main action: extends 2nd, 3rd, and 4th fingers

17
Q

Extensor digiti minimi

A

Proximal: lateral epicondyle (common belly with extensor digitorum)

Distal: extensor expansion of 5th finger (pinky finger)

Innervation: posterior interosseous nerve (branch of radial)

Main action: extends wrist joint, extends 5th finger

18
Q

Extensor carpi ulnaris

A

Proximal: lateral epicondyle of humerus

Distal: base of 5th metacarpal

Innervation: posterior interosseous nerve (branch of radial)

Main action: extends and adducts hand

19
Q

Supinator

A

Short shiny muscle with diagonally running fibers

Proximal: lateral epicondyle of humerus

Distal: proximal radius

Innervation: radial nerve

Main action: supinates forearm

20
Q

Extensor pollicis longus

A

Proximal: ulna, IM

Distal: base of distal phalanx of thumb

Innervation: posterior interosseous nerve (branch of radial)

Main action: extends distal phalanx of thumb

21
Q

Extensor pollicis brevis

A

Proximal: distal radius, IM

Distal: base of proximal phalanx of thumb

Innervation: posterior interosseous nerve (branch of radial nerve)

Main action: extends proximal phalanx of thumb

22
Q

Abductor pollicis longus

A

Proximal: ulna, radius, IM

Distal: base of 1st metacarpal

Innervation: posterior interosseous nerve (branch of radial nerve)

Main action: abduct thumb

23
Q

Extensor indicis

A

Proximal: distal ulna, IM

Distal: extensor expansion of 2nd finger

Innervation: posterior interosseous nerve (radial)

Main action: extends 2nd finger

24
Q

Extensor Superficial Layer

A
  1. Brachioradialis
  2. Extensor carpi radialis longus and brevis
  3. Extensor digitorum
  4. Extensor digiti minimi
  5. Extensor carpi ulnaris
25
Q

Extensor Deep Layer

A
  1. Supinator
  2. Extensor pollicis longus
  3. Extensor pollicis brevis
  4. Abductor pollicis longus
  5. Extensor indicis

CRNA- Anatomy (9 decks)

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