When viewing the leg from the side, which bony landmarks should align?

When viewing the leg from the side, which bony landmarks should align?

• A. Center of Lumbar Spine; Center of Knee; Center of Ankle
• B. Top of Iliac Crest; Center of Knee Cap; Just behind the Medial Malleolus
• C. Top of Iliac Crest; Center of Side of Knee; Just in front of Lateral Malleolus
• D. Top of Iliac Crest; Center of Knee Cap; Just behind Lateral Malleolus

Answer: (C)

When viewing the leg from the side, you want a straight, vertical line that stacks from hip to knee to ankle. The landmarks used for this plumb line should be stable and in the correct positions: the top of the iliac crest (hip height) as the starting point, the center of the side of the knee as the knee reference, and a point just in front of the lateral malleolus to indicate ankle alignment. This combination keeps the knee over the ankle and the pelvis level, which is essential for proper weight bearing and knee tracking in movements. Choosing top of the iliac crest, center of the side of the knee, and just in front of the lateral malleolus provides that aligned, vertical reference. Using the center of the knee cap would shift the line anteriorly and not reflect a true leg plumb line, and placing the line behind the malleolus would misplace the ankle reference. Similarly, starting from the lumbar spine shifts the reference away from the leg itself.

When viewing the leg from the side, you want a straight, vertical line that stacks from hip to knee to ankle. The landmarks used for this plumb line should be stable and in the correct positions: the top of the iliac crest (hip height) as the starting point, the center of the side of the knee as the knee reference, and a point just in front of the lateral malleolus to indicate ankle alignment. This combination keeps the knee over the ankle and the pelvis level, which is essential for proper weight bearing and knee tracking in movements.

Choosing top of the iliac crest, center of the side of the knee, and just in front of the lateral malleolus provides that aligned, vertical reference. Using the center of the knee cap would shift the line anteriorly and not reflect a true leg plumb line, and placing the line behind the malleolus would misplace the ankle reference. Similarly, starting from the lumbar spine shifts the reference away from the leg itself.