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Musculoskeletal > 1.4.1 Posterior Forearm > Flashcards

1.4.1 Posterior Forearm Flashcards

1
Q

The two compartments of the forearm are separated by?

A

The two bones (radius and ulna) and the interossues membrane

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2
Q

Muscles in the posterior compartment of the forearm originate from the?

A

Lateral epicondyle and epicondyle ridge of the humerus

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3
Q

Muscles in the posterior compartment of the forearm function as?

A

Extensors and supinators

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4
Q

What nerve innervates the posterior compartment of the forearm?

A

The radial nerve

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5
Q

What muscle flexes the elbow joint?

A

Brachioradialis

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6
Q

What muscles extend, abduct, or adduct the wrist joint?

A

Extensor carpi radialis longus and brevis, extensor carpi ulnaris

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7
Q

What muscles extend the medial four digits? (3)

A

Extensor digitorum, extensor indicis, and extensor digiti minimi

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8
Q

What muscles extend or abduct the thumb? (3)

A

Abductor pollicis longus

Extensor pollicis brevis

Extensor pollicis longus

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9
Q

What muscles supinate the forearm?

A

Supinator

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10
Q

These muscle have proximal attachment to the supracondylar ridge of the humerus?

A

Brachioradialis and extensor carpi radialis longus

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11
Q

These muscles have common extensor tendon attach to lateral epicondyle.

A

Extensor carpi radialis brevis, extensor digitorum, Extensor digiti minimi, and extensor carpi ulnaris

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12
Q

Brachioradialis has what function?

A

Flexes the elbow joint/forearm

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13
Q

What is the origin of the brachioradialis?

A

Suprarepicondylar ridge

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14
Q

Where does the brachioradialis insert?

A

Lateral surface of radius

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15
Q

What is the origin of the extensor carpi radialis longus?

A

Lateral supraepicondylar ridge

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16
Q

Where does the extensor carpi radialis longus insert?

A

Base of 2nd metacarpal

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17
Q

What is the origin of the extensor carpi radialis brevis?

A

Lateral epicondylar ridge

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18
Q

Where does the extensor carpi radialis brevis insert?

A

Into the base of the 3rd metacarpal

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19
Q

What is the function of the extensor carpi radialis?

A

Extend and abduct/radial deviates the wrist

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20
Q

What is the function of the Abductor Pollicis longus?

A

Abduct the thumb at the carpomatacarpal joint

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21
Q

Where does the abductor pollicis longus insert?

A

Base of the 1st metacarpal

22
Q

Where does the abductor pollicis longus originate?

A

Post Surface of ulna, radius, inteross membrane

23
Q

What is the function of the extensor pollicis brevis?

A

Extend the thumb

24
Q

Where does the extensor pollicis brevis insert?

A

it lies parallel to the APL tendon, but it travels further and inserts to the base of the proximal phalanx of the thumb

25
Q

What are the covered parts and what do they make up?

A

These make up the anatomical snuff box

26
Q

Where do the extensor pollicis brevis and longus originate from?

A

Posterior radius

Interosseus membrane

27
Q

Where does the extensor pollicis longus insert?

A

The base of the distal phalanx

28
Q

What is the function of the extensor pollicis longus?

A

Extends interphalangeal joint and metacarpophalangeal joint of the thumb

29
Q

What are the contents of the anatomical snuff box?

A

Extensor pollicis longus and brevis

Radial artery

Scaphoid

30
Q

Extensor digitorum functions to?

A

Extend the medial four digits

31
Q

Extensor digitorum originates from the?

A

Lateral epicondyle

32
Q

Extensor digitorum inserts?

A

On the extensor expansion

33
Q

Extensor tendons enter the hand through a _______ which lies deep to the _______.

A

Common Synovial sheath; extensor retinaculum

34
Q
A
35
Q

Describe the extensor digitorum at the distal metacarpal.

A
36
Q

Describe the extensor digitorum at the proximal phalanx.

A
37
Q

Compare the flexors and extensor hand insertions.

A
38
Q

The extensor digiti minimi enters the hand deep to the ______ in its own _____.

A

Extensor retinaculum; synovial sheath

39
Q

The extensor digiti minimi functions?

A

To extend

40
Q

The extensor carpi ulnaris inserts?

A

Inserts on the base of the 5th metacarpal

41
Q

The extensor indicis origin?

A

Ulna interos membrane

42
Q

The extensor indicis enters the hand deep to the extensor retinaculum ___________.

A

WIthin the common synovial sheath together with the extensor digitorum

43
Q

The extensor indicis tendon is located on the _______ side of the extensor digitorum tendon

A

Medial/ulnar side

44
Q

The supinator muscle originates?

A

Partially originates from lateral epicondyle and also from radial collateral ligament and anular ligament

45
Q

Where does the supinator insert?

A

It inserts into lateral, anterior/posterior surface of radius

46
Q

What is the function of the supinator?

A

Supinates the forearm by rotating radius

47
Q

What are the characteristics of elbow tendonitis (Lateral epicondylitis)?

A
48
Q

What is a synovial cyst of the wrist?

A
49
Q

What are the characteristics of the superficial branch of the radial nerve?

A
50
Q

What are the characteristics of the deep branch of the radial nerve?

A
51
Q
A

Musculoskeletal (53 decks)

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