AUE Exam 2 Fracture and Ligament Injuries Questions & answers | A Graded
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Course
AUE
Institution
AUE
What muscle is responsible for thumb opposition? - Adductor pollicis brevis
What innervates the adductor pollicis brevis? - median nerve
Which muscle of the hand has the longest moment arm and mechanical advantage leading
to destabilization of the CMC joint of the thumb? - adductor pollicis brev...
AUE Exam 2 Fracture and
Ligament Injuries Questions &
answers | A Graded
What muscle is responsible for thumb opposition? - ✔✔Adductor pollicis brevis
What innervates the adductor pollicis brevis? - ✔✔median nerve
Which muscle of the hand has the longest moment arm and mechanical advantage leading
to destabilization of the CMC joint of the thumb? - ✔✔adductor pollicis brevis
Dorsal dislocation of the middle phalanx of a digit will result in injury of what structure? - ✔✔volar
plate
Injury to UCL of the thumb would need protection against which forces? - ✔✔Radial forces
Collateral ligaments of the MP joints of the hand proide lateral stability when the MP joints are in.... -
✔✔flexion
Why is the safe position of the hand an antideformity position? - ✔✔maintains the length of
the collateral ligaments to prevent shortening in the claw hand deformity
What is the biomechanical role of the pulley system in digital flexion? - ✔✔Prevent bowstringing
Adds mechanical advantage
What does the pulley system of the hand consist of? - ✔✔5 annular pulleys
4 cruciates pulleys
, in each digit
Cut the A2 pulley = - ✔✔bowstringing
bowstringing = - ✔✔decreased PIP flexion
3 functions of campers chiasm - ✔✔1. provide pathway for FDP tendon
2. increase stability and baland of PIP
3. Prevents hyperextension of PIP joint
What causes mallet finger? - ✔✔forced flexion of extended finger
What causes jersey finger? - ✔✔forced extension of flexed finger
What causes UCL tear of thumb? - ✔✔
What causes sagittal band tear? - ✔✔
Management of boxers fracture - ✔✔Ulnar gutter othosis in safe position with as much flexion as
possible
Management of stable phalangeal fractures - ✔✔splint/buddy tape to adjacent finger for 4 weeks
Managment of minimally displaced phalangeal fractures - ✔✔hand based safe position splint 3-
7 weeks
AROM at 3-4 weeks
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