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CRNA- Anatomy > Muscles of Forearm > Flashcards

Muscles of Forearm Flashcards

(25 cards)

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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

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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

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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

Study These Flashcards
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

Study These Flashcards
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

Study These Flashcards
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

Study These Flashcards
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

Study These Flashcards
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

Study These Flashcards
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

Study These Flashcards
A
  1. Brachioradialis
  2. Extensor carpi radialis longus and brevis
  3. Extensor digitorum
  4. Extensor digiti minimi
  5. Extensor carpi ulnaris
25
Extensor Deep Layer
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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