1 - Hand And Wrist (1) Flashcards
What is location of insertion for flexor digitorum superficialis?
Middle phalanx
What are the muscles in the compartment affected by DeQuervian Tenosynovitis?
Abductor Pollicis Longus and Extensor Pollicis Brevis
Name the muscles of the 1st tendon compartment of the wrist:
Abductor pollicis longus
Extensor pillicis brevis
Name the muscles of the 2nd tendon compartment of the wrist:
Extensor carpi radialis longus and brevis
Name the muscles of the 3rd tendon compartment of the wrist:
Extensor pollicis longus
Name the muscles of the fourth tendon compartment of the wrist:
Extensor digitorum
Extensor indicis
Name muscles of the fifth tendon compartment of the wrist:
Extensor digiti minimi
Name the muscles of the sixth tendon compartment of the wrist:
Extensor carpi ulnaris
Which tendon compartments extend the wrist?
Two and six
Which tendon compartment extends all four fingers?
Four
What are juncturae tendinum?
Tendon interconnections
Can complicate locating a specific injury
Kinda like collateral circulation
For the proximal, middle, and distal phalanx, where are the growth plates?
On the proximal end
For the metacarpals, which end is the growth plate on?
Distal end
Lunate fx’s commonly produce what type of fx?
Die punch
Hamate fx’s are commonly associated with which sport?
Tennis (FOOSH)
Triquetrum fx’s commonly produce what type of fx?
Avulsion
Ganglion cysts commonly emerge as a result of a tear in the:
Scapholunate ligament
What is Kienbock disease?
Idiopathic necrosis of the lunate
How will Kienbock disease appear on radiograph?
Sclerotic lunate (more radiopaque than the other carpals)
What are the three areas that must be palpated as part of a wrist exam for suspected scaphoid fx?
- Snuffbox with wrist in ulnar deviation
- Dorsoradiocarpal joint at scapholunate interval
- Scaphoid tubercle
DDx radial-sided wrist pain (list five):
- Thumb base (carpometacarpal joint 1) OA
- Scaphoid fx
- de Quervain tenosynovitis
- Intersection syndrome
- Scapholunate ligament insufficiency
DDx ulnar-sided wrist pain (list six):
- TFCC injury
- DRUJ instability
- Ulnar impaction syndrome
- Kienbock disease
- Ulnar neuropathy at Guyon canal
- ECU tendon subluxation
TFCC stands for:
Triangular fibrocartilage complex
DRUJ stands for:
Distal radioulnar joint
ECU stands for:
Extensor carpi ulnaris
What are the components of the TFCC?
- The articular disc
- The dorsal and volar radioulnar ligaments
- The meniscus homologue
- The extensor carpi ulnaris tendon sheath
- The ulnocarpal ligaments
What tendons border the anatomical snuffbox:
Extensor pollicis brevis
Extensor pollicis longus
What intersection syndrome?
Pain due to inflammation at the crossing of extensor pollicis longus over extensor carpi radialis longus and brevis
Common in weigh lifters, d/t repetitive wrist extension
Describe Dupuytren’s Contracture:
Thickened nodule on palmar aponeurosis, proximal to the MCP
Grade 1 - nodule
Grade 2 - some flexion
Grade 3 - full forced flexure
Which type of arthritis often presents with ulnar deviation in late-stage dz?
RA
Which type of arthritis typically affects the PIPs and DIPs?
OA
Thenar atropy is associated with which nerve?
Median