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Flashcards in Dorsal Forearm And Hand Deck (29):
0

What artery would be damaged with a fracture above the epicondyles?

Brachial artery

1

Name the carpal bones

Scaphoid, Lunate, Triquetrum, Pisiform, Trapezium, Trapezoid, Capitate, Hamate

2

What type of joint is the DRUJ?

Synovial pivot
Supination and pronation

3

What is the role of the TFCC in the DRUJ?

Binds ends of radius and ulna together

4

What is the functional importance of the DRUJ?

Helps transmit loads from hand to forearm

5

Superficial (6) muscles of posterior forearm

Brachioradialis
ECRL
ECRB
Extensor digitorum
Extensor digiti minimi
ECU

6

Deep muscles (5) of posterior forearm

Supinator
APL
EPL
EPB
Extensor indicis

7

1st posterior compartment

EPB (extensor pollicis brevis)
APL (abductor pollicis longus)

8

2nd posterior compartment

ECRL (extensor carpi radialis longus)
ECRB (extensor carpi radialis brevis)

9

3rd posterior compartment

EPL (extensor pollicis longus)

10

4th posterior compartment

Extensor digitorum

11

5th posterior compartment

EDM (extensor digiti minimi)

12

6th posterior compartment

ECU (extensor carpi ulnaris)

13

Contents of snuffbox

EPL
EPB
Scaphoid
Radial artery
Superficial radial nerve

14

Which two muscles extend wrist on radial side?

ECRL and ECRB

15

Which two muscles both extend and abduct thumb?

APL and EPB

16

What muscles are involved with lateral epicondylosis (tennis elbow)?

Extensors attached to lateral epicondyle
Specifically ECRB

17

What is the cause and effect of tennis elbow?

Cause: overuse injury
Effects: pain with wrist extension, pain on lateral side of elbow, weak grip, weakness in scapular muscles

18

What nerve is damaged with Wrist Drop and what is a possible cause of this?

Radial nerve
Spiral fracture of humerus

19

What is DeQuervain's Syndrome and it's symptoms?

Inflammation of structures in 1st posterior compartment (EPB and APL)
Stretching causes increased pain

20

Who does DeQuervain's syndrome usually effect? How is it tested?

New Mothers and day care workers
(Hand extended and abducted when holding babies)

Will hurt when wrapping fingers around thumb and then flexing toward ulna

21

What is the functional purpose of the dorsal tubercle of the radius?

Allows passage of tendons of the forearm

Serves as trochlear pulley for tendon of long extensor of thumb

22

What is the functional purpose of the extensor retinaculum?

Prevents bow stringing of tendons when hand is extended

23

What is the purpose of synovial tendon sheaths?

Covers tendons on dorsal wrist to Reduce friction for tendons when traversing attachment of extensor retinaculum

24

What are intertendinous connections in the fingers and what do they restrict?

Link adjacent tendons to MCP joints
Restrict independent extension of fingers

*why one finger can't stay flexed as others are extended

25

What separates the cavity of DRUJ from the cavity of the wrist joint?

Articular disc

26

What is the purpose of the sacciform recess in the DRUJ?

Extension of synovial membrane that accommodates twisting of capsule during pron/supin

27

What muscles are involved with supination of the DRUJ?

Supinator (no resistance)
Biceps brachii (resistance)
EPL and ECRL (some assistance)

28

What muscles are involved with pronation of the DRUJ?

Pronator quadratus (primary)
Pronator teres (secondary)
FCR, palmaris longus, brachioradialis (some assistance)...when 1/2 pronated