Powerpoints Flashcards
What is the function of the distal radio-ulnar joint?
help transmit loads from hand to forearm
What is the purpose of the TFCC?
binds radius and ulna together
What are the normal ranges for ulnar and radial deviation?
ulnar deviation: 20-30 degrees
radial deviation: 10-20 degrees
What is contained in the first dorsal compartment?
EPB and APL
What is contained in the second dorsal compartment?
ECRL and ECRB
What is contained in the third dorsal compartment?
EPL
What is contained in the fourth dorsal compartment?
ED and EI
What is contained in the fifth dorsal compartment?
EDM
What is contained in the sixth dorsal compartment?
ECU
What is associated with lateral epicondylitis?
pain with wrist extension, weak grip
What muscles is most commonly involved with lateral epicondylitis?
ECRB
What is associated with wrist drop?
trouble extending wrist; radial nerve damage
What is associated with DeQuervain’s Syndrome?
inflammation of the 1st compartment
How would you test for DeQuervain’s Syndrome?
make a fist with thumb to palm and perform ulnar deviation
pain is indicitive
What is the function of the wrist?
provides stable base for hand to function
promotes gripping; assists with positioning for fine motor activities
What are the motions of the radiocarpal joint?
flexion/extension, radial/ulnar deviation, and circumduction
What are the motions of the intercarpal joints?
flexion/extension and radial deviation
What are the ligaments at the wrist joint?
anterior/posterior ligaments and radial/ulnar collateral ligaments
What is the purpose of the anterior/posterior ligaments of the wrist?
help strengthen joint capsule
Where is the ulnar collateral ligament of the wrist?
ulnar styloid process to triquetrum
Where is the radial collateral ligament of the wrist?
radial styloid process to scaphoid
What are the ligaments at the midcarpal joint?
anterior, posterior, and interosseous ligaments
What passes through the Guyon’s canal?
ulnar nerve and artery
What supplies the MCP joint?
deep digital arteries from superficial palmar arches
When are collateral ligaments of the MCP joint taut?
70-90 degrees flexion
When are collateral ligaments of the PIP joint taut?
25 degrees flexion
What are the ligaments of the CMC thumb joint?
radial and ulnar collateral; anterior and posterior oblique; intermetacarpal
What are the ligaments of the MCP thumb joint?
collateral and palmar ligaments
The superficial ulnar artery gives rise to what structure?
superficial palmar arch
What arises from the superficial palmar arch?
3 common digital arteries;
common palmar, palmar metacarpal, proper palmar digital
What structures are part of the extensor mechanism?
ORL, ED, lumbricals, and interossei
When is the ORL taut?
during DIP flexion, which pulls PIP into flexion
What happens when extending the PIP joints?
pulls DIP via ORL into extension
