010-111 · Question #230
In what plane does the lower leg move during the seated knee extension?
The correct answer is A. Sagittal. The seated knee extension moves the lower leg anteriorly through a flexion-to-extension arc, which is a movement occurring entirely within the sagittal plane.
Question
In what plane does the lower leg move during the seated knee extension?
Options
- ASagittal
- BFrontal
- CTransverse
- DMedian
How the community answered
(16 responses)- A69% (11)
- B19% (3)
- C6% (1)
- D6% (1)
Why each option
The seated knee extension moves the lower leg anteriorly through a flexion-to-extension arc, which is a movement occurring entirely within the sagittal plane.
The sagittal plane divides the body into left and right halves, and all flexion-extension movements occur within it. During seated knee extension, the lower leg swings anteriorly from a flexed position to full extension - a movement confined entirely to the sagittal plane with no lateral or rotational component.
The frontal plane governs abduction and adduction movements; knee extension does not move the leg medially or laterally.
The transverse plane governs rotational movements around a vertical axis; knee extension involves no axial rotation.
The median plane is a specific mid-sagittal reference plane through the body's centerline, not a standard anatomical classification used to describe joint movement direction.
Concept tested: Anatomical planes of motion - sagittal plane flexion-extension
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