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Forearm Flashcards

(50 cards)

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1
Q

Osteology of Elbow and Forearm

A
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2
Q

Flexion-Extension Movement of Forearm

A
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3
Q

Supination-Pronation of the Forearm

A
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4
Q

Muscles of the Anterior Forearm known as

A

Flexors and pronators

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5
Q

Superficial Layer of Anterior Forearm Muscles (4)

A
  1. Pronator Teres
  2. Flexor Carpi Radialis
  3. Palmar longus
  4. Flexor Carpi Ulnaris
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6
Q

The 4 superficial layer of anterior forearm muscles all originate from _____ _______ tendon (attached to the medial epicondyle of humerus)

A

The 4 superficial layer of anterior forearm muscles all originate from common flexor tendon (attached to the medial epicondyle of humerus)

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7
Q

Identify this muscle

A

Pronator Teres

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8
Q

Pronator Teres

Origin:
Insertion:
Innervation:
Action:

A

Pronator Teres

Origin: Humeral head: medial epicondyle (via common flexor tendon)

Ulnar head: coronoid process

Insertion: Middle portion of the lateral radius

Innervation: Median nerve (C5-T1)

Action: Pronates and flexes forearm (at elbow)

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9
Q

Identify this muscle

A

Flexor Carpi Radialis (FCR)

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10
Q

Flexor Carpi Radialis (FCR)

Origin:
Insertion:
Innervation:
Action:

A

Flexor Carpi Radialis (FCR)

Origin: Medial epicondyle (via common flexor tendon)

Insertion: Base of 2nd metacarpal (pointer/index finger)

Innervation: Median nerve (C5-T1)

Action: Flexes and abducts hand at wrist

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11
Q

Identify this muscle

A

Palmaris Longus

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12
Q

Palmaris Longus

Origin:
Insertion:
Innervation:
Action:

A

Palmaris Longus

Origin: Medial epicondyle

Insertion Palmar aponeurosis (apex) and flexor retinaculum

Innervation: Median nerve (C5-T1)

Action: Flexes hand (at wrist); tenses palmar aponeurosis

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13
Q

Identify this muscle

A

Flexor Carpi Ulnaris

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14
Q

Flexor Carpi Ulnaris

Origin:
Insertion:
Innervation:
Action:

A

Flexor Carpi Ulnaris

DON’T WORRY – know that this comes from the medial side;

Origin: Humeral head: medial epicondyle (via common flexor tendon)

Ulnar head: Olecranon process
Insertion: Pisiform, hook of hamate, 5th metacarpal

Innervation: Ulnar Nerve (

Action: Flexes adducts (ulnar deviation) hand (at wrist)

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15
Q

Intermediate layer of anterior forearm consists of ____ muscle and ____ heads

A

Intermediate layer of anterior forearm consists of one muscle and 2 heads

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16
Q

What muscle is this?

A

Flexor Digitorum Superficialis

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17
Q

Flexor Digitorum Superficialis

Origin:
Insertion:
Innervation:
Action:

A

Flexor Digitorum Superficialis

Origin: Humeroulnar head: medial epicondyle, coronoid process

Radial head: superior portion of radius

Insertion: Intermediate phalanx, digits 2-5 (index to pinky)

Innervation: Median Nerve (C5-T1)

Action: Flexes middle phalanges at the PIP joint of digits 2-5; may assist in flexion of proximal phalanges at MPP joints

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18
Q

Muscles of the deep layer of the anterior forearm (3); innervated by the anterior ________ nerve, a branch of the _____ nerve

A

Muscles of the deep layer of the anterior forearm (3); innervated by the anterior interosseous nerve, a branch of the median nerve

  1. Flexor digitorum profundus
  2. Flexor pollicis (thumb) longus
  3. Pronator quadratus
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19
Q

What is this muscle?

A

Flexor digitorum profundus

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20
Q

Flexor digitorum profundus

Origin:
Insertion:
Innervation:
Action:

A

Flexor digitorum profundus

Origin: Proximal ulna and interosseous membrane

Insertion: Bases of distal phalanx of digits 2-5

Innervation: Digits 2-3: anterior interosseous nerve (branch of the median nerve)

Digits 4-5: (Ulnar nerve)

Action: Flexes distal phalanges at the DIP joint of digits 2-5

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21
Q

What is this muscle?

Study These Flashcards
A

Flexor pollicis (thumb) longus

22
Q

Flexor pollicis (thumb) longus

Origin:
Insertion:
Innervation:
Action:

Study These Flashcards
A

Flexor pollicis (thumb) longus

Origin: Radius, interosseous membrane

Insertion: Base of distal phalanx of digit 1 (pollex/index finger)

Innervation: Anterior interosseous nerve (branch of median nerve)

Action: Flexes phalanges of digit 1 (THUMB)

23
Q

What is this muscle?

Study These Flashcards
A

Pronator quadratus

24
Q

Pronator quadratus

Origin:
Insertion:
Innervation:
Action:

Study These Flashcards
A

Origin: Distal ulna

Insertion: Distal radius

Innervation: Anterior interosseous nerve (branch of median nerve)

Action: Pronates forearm; bind radius and ulna together

25
Muscles of the Posterior Arm are all innervated by branches of the ____ nerve
Muscles of the Posterior Arm are all innervated by branches of the radial nerve
26
Posterior compartment consists of 2 layers of extensors, abductors, adductors of wrist and ______ of digits
Posterior compartment consists of 2 layers of extensors, abductors, adductors of wrist and extensors of digits
27
What muscle is this?
Brachioradialis
28
Brachioradialis
Origin: Supracondylar ridge of humerus Insertion: Distal lateral radius Innervation: Radial nerve Action: Flexes (weakly) forearm at elbow but strong in mid-pronated position
29
What muscle is this?
Extensor Indicis Most medial of deep muscles in posterior forearm
30
Extensor Indicis Origin: Insertion: Innervation: Action:
Origin: Distal 1/3 of posterior ulna and interosseous membrane Insertion: Extensor expansion of digit 2 Innervation: Posterior interosseous nerve (continuation of the deep branch of the radial nerve) Action: Extends proximal phalanx of digit 2 also extends hands at wrist
31
What muscle is this?
Extensor digitii minimi
32
What muscle is this?
Abductor Pollicis Longus Origin: Insertion: Innervation: Action:
32
Extensor digitii minimi Origin: Insertion: Innervation: Action:
Origin: Distal 1/3 of posterior ulna and interosseous membrane Insertion: Extensor expansion of digit 2 Innervation: Posterior interosseous nerve (continuation of the deep branch of the radial nerve) Action: Extends proximal phalanx of digit 2 also extends hands at wrist
33
Abductor Pollicis Longus Origin Insertion Innervation Action
Origin: Proximal ½ of posterior ulna, radius, and interosseous membrane Insertion: Base of 1st metacarpal Innervation: Posterior interosseous nerve (continuation of deep branch of radial nerve) Action: Abducts thumb and extends it at carpometacarpal
34
What muscle is this?
Extensor Pollicis Brevis
35
Extensor Pollicis Brevis Origin: Insertion: Innervation: Action:
Extensor Pollicis Brevis Origin: Distal 1/3 of posterior radius and interosseous membrane Insertion: Base of proximal phalanx of digit 1 Innervation: Posterior interosseous nerve (continuation of the deep branch of the radial nerve Action: Extends proximal phalanx of thumb at the metacarpophalangeal joint; also extends
36
What is this muscle?
Extensor Pollicis Longus
37
Extensor Pollicis Longus Origin: Insertion: Innervation: Action:
Origin: Middle 1/3 of posterior ulna and interosseous membrane Insertion: Base of distal phalanx Innervation: Posterior interosseous nerve (continuation of the deep branch of the radial nerve Action: Extends distal phalanx of thumb of at interphalangeal joint; extends carpometacarpal and metacarpophalangeal joints
38
What is this muscle?
Flexor pollicis (thumb) longus
39
Flexor pollicis (thumb) longus Origin: Insertion: Innervation: Action:
Origin: Middle 1/3 of posterior ulna and interosseous membrane Insertion: Base of distal phalanx Innervation: Posterior interosseous nerve (continuation of the deep branch of the radial nerve Action: Extends distal phalanx of thumb of at interphalangeal joint; extends carpometacarpal and metacarpophalangeal joints
40
What muscle is this?
Extensor Carpi radialis longus
41
Extensor Carpi radialis longus Origin: Insertion: Innervation: Action:
Origin: Supracondylar ridge of humerus Insertion: Base of 2nd metacarpal Innervation: Radial nerve (C5-T1) Action: Extend and adduct (radial deviation) the hand at the wrist; fist clenching
42
Extensor carpi radialis brevis Origin: Insertion: Innervation: Action:
Extensor carpi radialis brevis Origin: Lateral epicondyle Insertion: Base of 3rd metacarpal Innervation: Deep branch of radial nerve Action: Extend and abduct (radial deviation) the hand at the wrist
43
What muscle is this?
Extensor digitorum
44
Extensor digitorum Origin: Insertion: Innervation: Action:
Extensor digitorum Origin: Lateral epicondyle Insertion: Extensor expansion of digits 2-5 Innervation: Deep branch of the radial nerve Action: Primary extension at metacarpophalangeal joint digits 2-5 Secondary extension at interphalangeal joints (distal, middle, and proximal phalanges)
45
What muscle is this?
Extensor Carpi Ulnaris
46
Extensor Carpi Ulnaris Origin: Insertion: Innervation: Action:
Origin: 2 heads: lateral epicondyle and posterior border of ulna Insertion: Base of 5th metacarpal Innervation: Deep branch of the radial nerve Action: Extends and adducts (ulnar deviation) the hand at wrist
47
What is this muscle
Supinator
48
Supinator Origin: Insertion: Innervation: Action:
Supinator Origin: Lateral epicondyle, radial collateral ad annular ligament, ulna Insertion: Proximal 1/3 of the radius Innervation: Deep branch of the radial nerve Action: Supinates forearm
49
Fascial Compartments of forearm

Anatomy (22 decks)

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