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Anatomy > Forearm > Flashcards

Forearm Flashcards

1
Q

Pronator teres IO Action Innervation

A

Origin:
* Humeral head: Medial epicondyle and adjacent supracondylar ridge of humerus via common flexor tendon
* Ulnar head: Medial aspect of coronoid process of ulna

Insertion:
* Middle 1/3rd of anterolateral aspect of radius

Action:
* Pronation of forearm
* Flexion of forearm at elbow

Innervation:
* Median nerve

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2
Q

Flexor carpi radialis IO action innervation

A

Origin:
* Medial epicondyle of humerus via common flexor tendon

Insertion:
* Palmar aspects of bases of 2nd and 3rd metacarpal bones

Action:
* Flexion of hand at wrist
* Radial Deviation of hand at wrist

Innervation:
* Median nerve

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3
Q

Flexor carpi ulnaris IO action innervation

A

Origin:
* Humeral head: Medial epicondyle of humerus via common flexor tendon
* Ulnar head: Proximal 2/3 body of ulna; Olecranon of ulna

Insertion:
* Pisiform bone
* Hook of hamate bone
* Palmar aspect of base of 5th metacarpal bone

Action
* Flexion of hand at wrist
* Ulnar deviation of hand at wrist

Innervation
* Ulnar nerve

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4
Q

Palmaris longus IO action innervation

A

Origin:
* Medial epicondyle of humerus via common flexor tendon

Insertion:
* Palmar aponeurosis of hand
* Flexor retinaculum of hand

Action:
* Flexion of hand at wrist
* Stabilization of palmar aponeurosis

Innervation:
* Median nerve

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5
Q

Flexor digitorum superficialis IO Innervation

A

Origin:
* Humeroulnar head: Medial epicondyle of humerus via common flexor tendon; Medial aspect of coronoid process of ulna; Ulnar collateral ligament

  • Radial head: Proximal ½ of anterior border of radius

Insertion:
* Palmar aspects of the bodies of middle phalanges of digits #2-5

Innervation:
* Median nerve

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6
Q

Flexor digitorum superficialis Action

A
  • Flexion of hand at wrist
  • Flexion of digits #2-5 at MP joints
  • Flexion of digits #2-5 at PIP joints
    Flexion of PIP joints #2-5 is the primary action of this muscle
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7
Q

Flexor digitorum profundus IO Innervation

A

Origin:
* Medial aspect of coronoid process of ulna
* Superior ¾ of anterior and medial surfaces of body of ulna
* Interosseus membrane

Insertion:
* Palmar aspects of bases of distal phalanges #2-5

Innervation:
* Medial 1/2: Ulnar nerve
* Lateral 1/2: Anterior interosseus nerve (branch of median nerve)

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8
Q

Flexor digitorum profundus Action

A
  • Flexion of hand at wrist
  • Flexion of digits #2-5 at MP joints
  • Flexion of digits #2-5 at IP joints
    Flexion of DIP joints #2-5 is the primary action of this muscle
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9
Q

Pronator quadratus IO Action Innervation

A

Origin:
* Anterior aspect of distal ¼ of ulna
Insertion:
* Anterior aspect of distal ¼ of radius

Action
* Pronation of forearm

Innervation
* Anterior interosseus nerve (branch of median nerve)

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10
Q

Flexor pollicis longus IO Action Innervation

A

Origin:
* Anterior surface of radius
* Adjacent interosseous membrane of forearm

Insertion:
* Palmar aspect of base of distal phalanx of thumb

Action
* Flexion of thumb at MCP joint
* Flexion of thumb at IP joint

Innervation
* Anterior interosseus nerve (branch of median nerve)

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11
Q

Anconeus IO Action Innervation

A

Origin:
* Posterior aspect of lateral epicondyle of humerus

Insertion:
* Olecranon
* Proximal end of body of ulna

Action
* Extension of forearm at elbow

Innervation
* Radial nerve

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12
Q

Brachioradialis IO Action Innervation

A

Origin:
* Superior 2/3 of lateral supracondylar ridge of humerus
Insertion:
* Lateral aspect of distal part of radius

Action
* Flexion of forearm at elbow

Innervation
* Radial nerve

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13
Q

Extensor carpi radialis longus IO Action Innervation

A

Origin:
* Inferior 1/3 of lateral supracondylar ridge of humerus

Insertion:
* Dorsal aspect of base of 2nd metacarpal bone

Action:
* Extension of hand at wrist
* Radial Deviation of hand at wrist

Innervation:
* Radial nerve (before division into deep and superficial branches)

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14
Q

Extensor carpi radialis brevis IO Action Innervation

A

Origin:
* Lateral epicondyle of humerus via common extensor tendon

Insertion:
* Dorsal aspect of base of 3rd metacarpal bone

Action
* Extension of hand at wrist
* Radial Deviation of hand at wrist

Innervation
* Deep branch of radial nerve

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15
Q

Extensor carpi ulnaris IO Action Innervation

A

Origin:
* Lateral epicondyle of humerus via common extensor tendon

Insertion:
* Medial aspect of base of 5th metacarpal bone

Action
* Extension of hand at wrist
* Ulnar Deviation of hand at wrist

Innervation
* Posterior interosseus nerve (branch of radial nerve)

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16
Q

Extensor digitorum IO Action Innervation

A

Origin:
* Lateral epicondyle of humerus via common extensor tendon

Insertion:
* Dorsal aspect of base of both middle and distal phalanges of digits #2-5

Action
* Extension of hand at wrist
* Extension of digits #2-5 at MP joints
* Extension of digits #2-5 at IP joints

Innervation
* Posterior interosseus nerve (branch of radial nerve)

17
Q

Extensor digiti minimi IO Action Innervation

A

Origin:
* Lateral epicondyle of humerus via common extensor tendon

Insertion:
* Extensor expansion of 5th digit

Action:
* Extension of 5th digit at MP joint
* Extension of 5th digit at IP joints

Innervation:
* Posterior interosseus nerve (branch of radial nerve)

18
Q

Supinator IO Action Innervation

A

Origin:
* Lateral epicondyle of humerus
* Radial collateral and annular ligaments
* Supinator crest and supinator fossa of ulna

Insertion:
* Anterior, lateral and posterior aspects of proximal 1/3 of radius

Action
* Supination of forearm

Innervation
* Posterior interosseus nerve (branch of radial nerve)

19
Q

Abductor pollicis longus IO Action Innervation

A

Origin:
* Posterior aspect of proximal ½ of ulna
* Posterior aspect of middle 1/3 of radius
* Adjacent interosseous membrane of forearm

Insertion:
* Lateral aspect of base of 1st metacarpal bone

Action
* Abduction of thumb at CMC joint
* Extension of thumb at CMC joint

Innervation
* Posterior interosseus nerve (branch of radial nerve)

20
Q

Extensor pollicis longus IO Action Innervation

A

Origin:
* Posterior aspect of middle ½ of ulna
* Adjacent interosseous membrane of forearm

Insertion:
* Dorsal aspect of base of distal phalanx of thumb

Action
* Extension of thumb at IP joint
* Extension of thumb at MCP joint
* Extension of thumb at CMC joint

Innervation
* Posterior interosseus nerve (branch of radial nerve)

21
Q

Extensor pollicis brevis IO Action Innervation

A

Origin:
* Posterior surface of distal 1/2 of radius
* Adjacent interosseous membrane of forearm

Insertion:
* Dorsal aspect of base of proximal phalanx of thumb

Action:
* Extension of thumb at MCP joint
* Extension of thumb at CMC joint

Innervation:
* Posterior interosseus nerve (branch of radial nerve

22
Q

Extensor indices IO Action Innervation

A

Origin:
* Posterior surface of distal 1/3 of ulna
* Adjacent interosseous membrane of forearm

Insertion:
* Extensor expansion of 2nd digit

Action:
* Extension of 2nd digit at MCP joint
* Extension of 2nd digit at IP joints

Innervation
* Posterior interosseus nerve (branch of radial nerve)

Anatomy (10 decks)

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