Which term is listed as a plane of motion?

Which term is listed as a plane of motion?

• A. Saggittal
• B. Diagonal
• C. Circular
• D. Spiral

Answer: (A)

Planes of motion are fixed surfaces that categorize how we move. The sagittal plane divides the body into left and right halves and is where flexion and extension occur, such as bending at the elbow or lifting the leg forward. The axis associated with these movements runs side to side (mediolateral). The other terms describe movement patterns rather than fixed planes—diagonal, circular, and spiral refer to paths or trajectories, not a defined anatomical plane. Therefore, the term listed as a plane of motion is sagittal.

Planes of motion are fixed surfaces that categorize how we move. The sagittal plane divides the body into left and right halves and is where flexion and extension occur, such as bending at the elbow or lifting the leg forward. The axis associated with these movements runs side to side (mediolateral). The other terms describe movement patterns rather than fixed planes—diagonal, circular, and spiral refer to paths or trajectories, not a defined anatomical plane. Therefore, the term listed as a plane of motion is sagittal.