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OS 203 > OS 203 2 Elbow, Forearm, Wrist, Hand - Sheet1 > Flashcards

OS 203 2 Elbow, Forearm, Wrist, Hand - Sheet1 Flashcards

1
Q

Attachment of forearm flexors

A

Medial epicondyle (and supracondylar ridge)

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2
Q

Attachment of forearm extensors

A

Lateral epicondyle (and supracondylar ridge)

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3
Q

Parts of the humerus that are in contact with nerves (4)

A

Axillary - surgical neck; Radial - radial nerve; Median - distal; Ulnar - Medial epicondyle

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4
Q

Intercondylar fracture can result from?

A

severe fall from flexed arm (may lead to separation of parts of the humeral shaft)

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5
Q

Attachment of brachialis tendon on the ulna

A

Ulnar tuberosity

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6
Q

Attachment of deep part of supinator

A

Supinator crest & fossa (next to the tuberosity)

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7
Q

Accomodates scaphoid and lunate carpals

A

Styloid process of radius

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8
Q

Passage of tendons of forearm muscles (radius)

A

Dorsal tuberosity (Lister’s tubercle)

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9
Q

Attachment of biceps brachii

A

Radial tuberosity

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10
Q

Transfers force from radius and ulna to humerus

A

Middle radioulnar (articulation)

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11
Q

3 ligaments in the elbow

A

Ulnar collateral, Lateral/radial collateral, Annular

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12
Q

3 bands ulnar collateral ligament (strongest, weakest, deepens trochlea)

A

Anterior oblique ulnar (strongest), Posterior oblique (weakest), Transverse/Oblique ulnar (deepens trochlea)

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13
Q

Chief (2) and secondary (2) flexors of the elbow

A

Chief - brachialis and biceps brachii; Secondary - brachioradialis and pronator teres

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14
Q

Chief extensor of elbow

A

Triceps brachii (medial head)

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15
Q

Extensor retinaculum is continuous with?

A

Palmar carpal ligament (anterior)

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16
Q

Prime mover of forearm pronation

A

Pronator quadratus (assisted by teres)

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17
Q

Superficial layer = (3)

A

Brachioradialis + ECRL + ECRB

18
Q

The only muscles of the posterior compartment that do not cross (2). Can these act at the wrist?

A

Brachioradialis, supinator. Nope.

19
Q

Extensor carpi ulnaris has 2 heads…

A

Humeral head (from common extensory tendon), Ulnar head (arising from common aponeurosis attached to posterior ulna, shared with FCU & FDP)

20
Q

Indispensable when clenching the fist (2)

A

ECRL, ECU

21
Q

Elbow pain (2)

A

Tennis elbow (pain in lateral epicondyle); Golfer’s elbow (pain in medial epicondyle)

22
Q

Functional contribution to total hand fxn (5)

A

Thumb 40, Index 20, Middle 20, Ring 10, Little 10

23
Q

Loss of hand fxn equates to (2)

A

Loss 90 upper ex fxn, Loss 54 entire fxn

24
Q

Nerves: power grip, precision grip

A

power - ulnar; precision - median

25
Q

May be injured in hamate fracture

A

Ulnar nerve and artery (compromise grip strength)

26
Q

What kind of joint? Radiocarpal

A

Condyloid

27
Q

What kind of joint? Intercarpal

A

Arthrodial (gliding joint/plane join)

28
Q

What kind of joint? 1st carpometacarpal joint

A

Sellar (saddle)

29
Q

What kidn of joint? Metacarpophalangeal joint

A

Ginglymus

30
Q

Flexor retinaculum and palmaris longus tendon are continuous with

A

Palmar aponeurosis

31
Q

Palmar aponeurosis is thick in the fingers… what is it called?

A

Digital sheaths

32
Q

Base of palmar aponeurosis

A

Superficial transverse metacarpal ligament

33
Q

Skin ligaments that hold the palmar skin close to the aponeurosis

A

Retinacula cutis

34
Q

Tendon deepest and most radial in the forearm

A

Flexor pollicis longus

35
Q

Involved in trigger finger

A

A1

36
Q

Most impt annular ligaments

A

A2, 4

37
Q

Annular ligaments prevent what

A

Bowstringing of tendons when extended

38
Q

Compartments of the hand (5)

A

Thenar, Adductor (ad poll), Hypothenar, Central (lumbricals), Interosseus (interossei)

39
Q

Only muscles that originate and insert into other tendons

A

Lumbricals

40
Q

If musculocutaneous nerve is damaged, can elbow still be flexed and forearm be supined? Sensation?

A

Yes, though weakly. Kahit wala na yung coracob, biceps, and brachialis, meron pa ring brachioradialis and supinator. However, loss of sensation may occur sa lateral surface ng forearm (supplied by antebrachial cutaneous nerve).

41
Q

Hand circulation comes from? (2)

A

30% radial 70% ulnar

OS 203 (7 decks)

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