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Clinical Anatomy 1 Aryssara > Posterior Forearm And Dorsum Of Hand > Flashcards

Posterior Forearm And Dorsum Of Hand Flashcards

1
Q

What separates the forearm into posterior and anterior compartments?

A

Interosseous membrane between ulna and radius.

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2
Q

What muscles are in the posterior compartment of the forearm?

A

Brachioradialis, ECRL, ECRB, Extensor Indices, Extensor Digiti minimi, Extensor Digitorum, Supinator, Abductor pollicis longus, EPL, EPB, Anconeous, ECU.

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3
Q

What nerve innervates the posterior compartment of the forearm?

A

Radial Nerve

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4
Q

When the deep branch of the radial nerve pierces the supinator, it exits as _____________.

A

The posterior interosseous nerve.

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5
Q

What are the attachments of the anconeus?

A

Lateral epicondyle of the humerus to lateral surface of the olecranon

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6
Q

What are the actions and innervation of anconeus?

A

Actions- elbow extension

Innervation- radial nerve

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7
Q

What are the attachments of abductor pollicis longus?

A

From proximal posterior radius, ulna, and interosseous membrane to the base of the 1st metacarpal & trapezium

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8
Q

What are the actions and innervation of abductor pollicis longus?

A

Actions- Abducts and extends thumb at carpometacarpal joint and abducts hand at wrist (radial deviation)

Innervation- radial nerve

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9
Q

What are the spinal segments of anconeus?

A

C7-8

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10
Q

What are the spinal segments of abductor pollicis longus?

A

C6-8

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11
Q

What are the attachments of brachioradialis?

A

From the lateral supracondylar ridge of the humerus to the distal radius lateral to the styloid process.

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12
Q

What are the actions and spinal segments of brachioradialis?

A

Actions- flexes the elbow

Spinal Segments- C5-6

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13
Q

What are the attachments of extensor carpi radialis longus?

A

From the lateral supracondylar ridge of the humerus to the base of the 2nd metacarpal.

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14
Q

What are the actions and spinal segments of ECR-Longus?

A

Extends and abducts hand at wrist (radial deviation) & assists in flexion of the elbow.

Spinal Segments- C6-8

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15
Q

What are the attachments of ECR-Brevis

A

From the lateral epicondyle of the humerus to the base of the 3rd metacarpal.

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16
Q

What are the actions and spinal segments of ECR-Brevis?

A

Actions- Extends and abducts hand at wrist (radial deviation)

Spinal Segments- C6-8

17
Q

What are the attachments of EC-Ulnaris?

A

From the lateral epicondyle of the humerus to the base of the 5th metacarpal

18
Q

What are the actions and spinal segments of EC-Ulnaris?

A

Actions- Extends and adducts hand at wrist (ulnar deviation)

Spinal Segments- C6-8

19
Q

What are the attachments of extensor digitorum?

A

From the lateral epicondyle to the extensor expansions of digits 2-5.

20
Q

What are the actions and spinal segments of extensor digitorum?

A

Actions- extends phalanges (primarily at metacarpophalangeal, secondarily at interphalangeal) and hand at wrist

Spinal Segments- C6-8

21
Q

What are the attachments of extensor digiti minimi?

A

From the lateral epicondyle to the digital expansion of the 5th digit.

22
Q

What are the actions and spinal segments of extensor digiti minimi?

A

Actions- Extends 5th digit (metacarpophalangeal and interphalangeal)

Spinal segments- C7-8

23
Q

What are the attachments of extensor indicis?

A

From the posterior radial surface of the ulna and interosseous membrane to the digital expansion of the 2nd digit.

24
Q

What are the actions and spinal segments of extensor indicis?

A

Actions- Extends 2nd digit metacarpophalangeal and interphalangeal)

Spinal Segments- C7-8

25
Q

What are the attachments of extensor pollicis brevis?

A

From the posterior radial surface & interosseous membrane to the base of the 1st proximal phalanx

26
Q

What are the actions and spinal segments of extensor pollicis brevis?

A

Actions- Extends thumb (metacarpophalangeal) & extends & abducts CMC joint

Spinal Segments- C6-8

27
Q

What are the attachments of extensor pollicis longus?

A

From the middle 1/3 of the posterior surface of the ulna & interosseous membrane to the base of the 1st distal phalanx

28
Q

What are the actions and spinal segments of extensor pollicis longus?

A

Actions- extends thumb (CMC & metacarpophalangeal & interphalangeal)

Spinal Segments- C6-8

29
Q

What are the attachments of the supinator?

A

From the lateral epicondyle , radial collateral ligament & supinator crest of the ulna to the lateral surface of the proximal radius

30
Q

What are the actions and spinal segments of the supinator?

A

Actions- supinates forearm

Spinal Segments- C5-6

31
Q

What are the attachments of the dorsal interossei muscles of the hand?

A

From the adjacent sides of the metacarpals to the proximal phalangeal bases and dorsal digital expansions of digits 2-4

32
Q

What are the actions, innervation, and spinal segments of the dorsal interossei muscles?

A

Actions- Abducts (metacarpophalangeal), flexes (metacarpophalangeal) & extends (interphalangeal) digits 2-4.

Innervation- deep branch of ulnar nerve

Spinal Segments-C8-T1

Clinical Anatomy 1 Aryssara (16 decks)

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