Wrist and hand anatomy, pathologies, diagnoses, exams, treatments.

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NPTE NPTE Flashcards on Wrist and hand anatomy, pathologies, diagnoses, exams, treatments., created by Mia Li on 05/06/2019.
Mia Li
Flashcards by Mia Li, updated more than 1 year ago
Mia Li
Created by Mia Li over 5 years ago
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Question Answer
Which styloid process is more distal? Radial.
What structures form the cubital tunnel? 1. medial epicondyle of the humerus 2. arcuate ligament 3. Osborne's fascia
Which nerve gets entrapped easily in the cubital tunnel? The ulnar nerve.
List the proximal row of carpal bones (lateral to medial) 1. scaphoid 2. lunate 3. triquetrum 4. pisiform
List the distal row of carpal bones (lateral to medial) 1. trapezium 2. trapezoid 3. capitate 4. hamate
To which carpal bones does the flexor retinaculum attach? 1. scaphoid 2. trapezium
Most frequently fractured carpal bone? Scaphoid.
Name the 3 arches of the hand. 1. longitudinal arch 2. metacarpophalangeal transverse 3. carpal transvers
The radiocarpal joint is stabilized laterally by the _____ and medially by the _______. lateral: radial collateral ligament medial: triangular fibrocartilage complex
Attachment of the TFCC 1. ulna 2. lunate 3. triquetrum
Load bearing ratio at the distal radioulnar joint. radius 60: ulnar 40
T/F: there are 3 degrees of movement by the pisiform. F. It rests on triquetrum and does not participate in intercarpal motion.
Which direction is common for lunate displacement? Which nerve might be impinged? Anterior displacement. Median nerve.
Main joint for wrist extension. Radiocarpal joint.
Main joint for wrist flexion. Mid carpal joint.
Which muscle is the most active during gripping? Extensor carpi radialis (holds wrist in slight extension)
The three 'stabilizers' of the wrist that are active during both flexion and extension. 1. extensor carpi ulnaris 2. extensor pollicis brevis 3. abductor pollicis longus
Which two muscles are major wrist flexors? Flexor carpi radialis Flexor carpi ulnaris
Three groups of anterior forearm muscles. 1. pronators 2. Hand flexors 3. Digit flexors
Which muscles in the forearm pronate the wrist? pronator teres, pronator quaratus
Which muscles in the forearm flex the hand? 1. flexor carpi radialis 2. flexor carpi ulnaris 3. palmaris longus
Which muscles in the forearm flex the digits? 1. flexor digitorum superficialis and profundus 2. flexor pollicis longus
Which muscles in the posterior forearm extend the hand and wrist? 1. extensor carpi radialis longus/brevis 2. extensor carpi ulnaris
Which muscles in the posterior forearm extend the medial 4 digits? 1. extensor digitorum 2. extensor indicis 3. extensor digiti minimi
Which muscles in the posterior forearm extend the thumb? 1. abductor pollicis longus 2. extensor pollicis brevis and longus
The collateral ligaments of the metacarpophalangeal joints become tight during _______. Flexion.
T/F: the IP collateral ligaments also become tight in flexion. F. They do not.
Optimal use of hand requires ___ deg extension. 20 - 30
The ______ muscles extend IPs and MCP joints. The _____ muscle and ____ place tension on the extensor expansion to allow IP extension. Extensor digitorum muscles. Interossei and lumbricals place tension.
Which muscle causes IP and MCP extension at CMC retroposition? Extensor pollicis longus.
When the MCP joints are stable, the FDS flexes the _______. PIP
When the PIPs are stable, the FDP flexes the _____s. DIPs.
Which muscle can hollow the paln when holding a cup of water? Oppones digiti minimi
The inability to maintain a functional wrist position and the inability to release object is most likely damage of the ______ nerve. Radial.
The inability to flex 2nd and 3rd digits and unable to perform a precision grip is most likely caused by damage of the ______. Median nerve.
The inability to flex the 4th and 5th digits and unable to perform the power grip is most likely due to damage of the ______. Ulnar nerve.
Which actions does the dorsal radiocarpal ligament restrict? flexion, pronation radial deviation
Which actions does the palma ulnocarpal ligament restrict? extension, supination
During finger flexion, the digits rotate _____ to assist grasping. Radially.
Thumb movement: (examprep page 12): (concave/convex) on (concave/convex) during flexion/extension. concave on convex.
Thumb movement: (examprep page 12): (concave/convex) on (concave/convex) during abduction/adduction. convex on concave.
Capsular pattern for wrist: flexion = extension
Capsular pattern for midcarpal and carpometacarpal joints. Equal in all directions
Capsular pattern for trapeziometacarpal joint abduction more limited than extension
Which test is for the TFCC integrity? ulnomeniscotriquetral dorsal glide test
What does the Watson test assess? Carpal instabiity.
Which two tests are specifically for de Quervain's tenosynovitis? 1. Eichhoff's test 2. Finkelstein's test
How long is the Phalen's test? 1 min
What is normal for the two-point discrimination test? successfully detect less than 6mm.
Describe the Allen test. 1. open-close hand quickly then make a fist 2. compress both radial and ulnar arteries - open fist- let go of radial compression - observe refill 3. repeat on the ulnar side.
Describe the Bunnel-Littler test 1. keep MCP extended, measure maximal PIP flexion 2. flex MCP then measure maximal PIP flexion If both tight: caspular tightness If only (1) is tight: tight intrinsic hand muscles
The 'Bunnel-Littler' test for DIP joint. If both tight: capsule tightness If DIP tighter during PIP extension: retinaculum is tight.
For Carpal tunnel syndrome, (pg 64), What should you rule out first? 1. c-spine 2. peripheral nerve entrapment elsewhere 3. TOS
Some common comorbidities of carpal tunnel syndrome? 1. pregnancy 2. diabetes 3. RA
Weakness pattern of carpal tunnel syndrome? 1. thenar muscles 2. lateral 2 lumbricals
De Quervain's tenosynovitis affects mainly ________ and _______ tendons. 1. extensor pollicis brevis 2. abductor pollicis longus
Possible MOI for de Quervain's tenosynovitis? 1. repetitive microtrauma 2. swelling during pregnancy
De Quervain's tenosynovitis involves pain at ______, decreased ____ strength, and a positive ______ test. Pain at [anatomical snuffbox] , decreased [grip] strength, and a positive [Finkelstein's] test.
How long is the Colles' fracture site immobilized after the incident? 5-8 weeks.
What is it called if the distal radius is volarly displaced during a wrist fracture? Smith's fracture
Which carpal bone fractures the easiest? Scaphoid
How long should the carpals be immobilized after a scaphoid fracture? 4- 8 weeks.
Dupytren's contracture, if patient has DM, most likely _______ fingers. If no DM, most likely _____ fingers. DM: 3rd and 4th fingers No DM: 4th and 5th fingers
Comparing Boutonniere deformity and swan neck deformity: Where is the tear? Boutonniere: [central] tendinous slip of extensor hood. Swan neck: dorsal subluxation of [lateral] extensor tendons
Comparing Boutonniere deformity and swan neck deformity: MCP, PIP and DIP positions? Boutonniere: PIP flexed, MCP and DIP extended. Swan neck: PIP extended, MCP and DIP flexed.
Ape hand deformity is an aspect of _____ nerve palsy. Median.
Rupture of the extensor tendon at its insertion into distal phalanx of digits is called ________. Mallet finger
Finger positioning for Mallet finger. Flexed DIP.
Your patient is referred here for 'gamekeeper's thumb', which structure should you examine? Ulnar colateral ligament of MCP joints of the 1st digit.
Boxer's fracture is at the neck of _____. usually casted for _____. 5th metacarpal cast for 2-4 weeks.
What is the test for lunotriquetral ligament called? Regan's test.
Which tendon is possibly ruptured if the patient presents with the jersey finger sign? flexor tendon at the distal phalanx.
Which test, if positive, suggests ulnar nerve damage resulting in flexor pollicis brevis weakness? Froment's sign
Which Arthritis: 1. painful at rest 2. swelling at DIPs 3. swelling at PIP, MCP, wrist in women 20 - 40. 1. bacterial arthritis 2. OA 3. RA
T/F: carpal tunnel affects both radial and ulnar side equally. F. mainly affects radial side.
Wrist pain and sensory changes with lunate tenderness might be due to Kienbock's disease. (avascular necrosis of the Lunate)
Any ROM restriction in Kienbock's disease? Yes. progressive limitation of wrist ROM.
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