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2018

Lower Extremity

QuestionAnswer
Where should the CR enter for a lateral projection of the ankle? medial malleolus
Where should the CR enter for a lateral projection of the foot? base of the third metatarsal
How much should the the plantar surface of the foot be rotated on an AP oblique projection of the foot in either medial or lateral rotation, 30 -40 degrees
Where should the CR enter for an AP projection of the ankle? ankle joint, midway between the malleoli
Where should the CR enter for AP projection of the toes? third MTP joint
How should the plantar surface of the foot be placed for an axial projection of the calcaneus? 90 degrees from the plane of the IR
How many bones are in the foot? 26
How many bones make up the leg? 2
How many degrees of angulation are required to open the IP joint spaces of the toes on an AP projection? 15 degrees
How many metatarsal bones are in the foot? 5
How many phalanges are in the great toe? 2
How many tarsal bones are in the foot? 7
How much is the knee flexed for a lateral projection? 20 to 30 degrees
On which aspect of the foot does the cuboid lie? lateral
Where is the central ray directed for the tangential projection (Settegast method) of the patella? Through the patellofemoral joint space
What are the two flat, superior surfaces of the tibia are called ? tibial plateaus
How many degrees and which direction do the tibial plateaus slope? posteriorly 10 to 20 degrees
What is the prominent process on the anterior surface of the tibia called? tibial tuberosity
What are the circular fibrocartilage disks or pads that lie on the tibial plateaus called? menisci
If the knee is flexed 40 degrees for the PA axial intercondylar fossa (Camp-Coventry) projection, how should the central ray be angled? 40 degrees
What are the essential oblique projections of the ankle? AP oblique, 45-degree medial rotation and AP oblique, 15- to 20-degree medial rotation for the ankle mortise
To demonstrate the ankle mortise, the leg and foot should be rotated medially how many degrees? 15 to 20 degrees
When the malleoli of the ankle are positioned parallel with the IR, the ankle is in position for which projection? AP oblique, 15- to 20-degree medial rotation for the ankle mortise
Created by: Mwalker2
 

 



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