2nd wrist Flashcards
(34 cards)
a. What is a dorsal wrist?
a. Occasionally a cystic, pea-sized swelling (ganglion)
b. Can occur on the dorsal or volar aspect of the wrist
c. Small tiny tear in the joint capsule allowing fluid to escape
b. What causes dorsal wrist?
a. Perhaps biomechanical alterations
a. What is a mallet finger?
a. Terminal phalanx of the finger is permanently flexed at the DISTAL joint
b. Cannot be voluntarily extended
a. Of the anatomic snuff box: what is the floor, ulnar border, radial border
a. Scaphoid
b. Extensory pollicus longus
c. Abductor polllicus longus
a. What may repetitive and overuse of ulnar and radial deviation lead to?
a. De quervains disease aka stenosing tenosynovitis
b. Swelling and inflammation in tunnel 1
c. Abductor pollics longusand extensory pollicus brevis involved.
a. De quervains disease is more common in woman, T/F
a. True
b. What do patients report when with de quervains disease?
a. Pain at dorsolateral aspect of the wrist
b. Thumb and/or lateral forearm
a. What are the short muscles of the thumb?
a. Abductor pollicus brevis
b. Flexor pollicus brevis
c. Opponens pollicis
d. Adductor pollicis
a. What is skiers thumb?
a. Ulnar collateral ligament avulsion of the MCP joint
b. Aka: gamekeeprs thumb
a. What are the short muscles of the 5th digit?
a. Abductor digiti minimi
b. Flexor digiti minimi
c. Opponens digit minimi
a. What are the interosseous muscles of the hand?
a. Three palmar interossei
i. Each adduct the digit toward the middle digit
b. Four dorsal interossei
i. Abduct the index, middle and ring fingers from the midline of hand
a. What do lumbricales function as?
a. To perform the motion of IP joint extension with the MCP joint held in extension
b. Can assist the MCP flexion
a. What is the trasnverse arch formed by?
a. Within palmar concavity of the carpal bones
b. Scaphoid and trapezium laterally
c. Pisiform and hamate medially
b. What is the metacarpal arch formed by?
a. Formed by metacarpal heads
c. What forms the longtiudinal arch?
a. 3rd and 5th digit
b. Spans lengthwise keystone at MCP joint
d. What forms the oblique arches?
a. Thumb in opposition to the other fingers
a. What are the 3 peripheral nerves that supply the skin and muscles of wrist and hand?
a. Median
b. Ulnar
c. Radial nerve
a. What are the vascular arches of the hand?
a. Dorsal arches
b. Palmar arches
a. What is keinbochs disease?
a. Aka avascular necrosis of lunate
b. Occupational excessive dominant hand use
c. Localized and radiating wrist pain, swelling and disability
i. Unilateral
d. Entrapment neuropathy, DJD
e. Increased lunate density
i. Short ulnar bone in 75% of cases
ii. Replace lunate with plastic implant
iii. Treatment: reduction of hand trauma
a. Pronation of the forearm causes :
a. Concave ulnar notch of the radius glides around the peripheral surface of the relatively fixed convex ulnar head
b. Limited by bony impaction between the radius and the ulna
a. What is supination limited by?
a. Interosseous membran
b. Bony impaction between the ulnar notch of the radius and
c. the ulnar styloid process
a. Where does wrist flexion take place?
a. Midcarpal joint
b. Slight ulnar deviation and supination of forearm
b. Where does wrist extension take place?
a. Radiocarpal joint
b. Slight radial deviation and pronation of forearm
a. Where does radial deviation occur? What is it limited by?
a. Between the proximal and distal rows of the carpal bones
b. Limited by impact of scaphoid onto the radial styloid and ulnar collateral ligament
