Final answer:
The leg controls postural sway in the sagittal plane, which is essential for maintaining balance during stationary standing and is managed by the muscles in the anterior and posterior parts of the legs. the correct option is A) Sagittal.
Step-by-step explanation:
The leg controls postural sway in the sagittal plane :
Postural sway is the horizontal movement around the center of gravity that occurs when a person stands in a stationary position. Understanding the planes of motion is crucial when discussing movement and balance. The sagittal plane divides the body into right and left portions and is associated with flexion and extension movements, such as walking and squatting.
Movements in the sagittal plane are controlled primarily by the muscles in the anterior and posterior parts of the legs. The leg muscles coordinate actions to maintain balance and counteract the natural sway that occurs due to gravity and other forces. This understanding helps in both clinical assessment and the development of rehabilitation programs for balance improvement.