Lateral flexion primarily takes place in which plane?

• A. Coronal
• B. Sagittal
• C. Transverse
• D. Vertical

Answer: (A)

Lateral flexion primarily occurs in the coronal plane, also known as the frontal plane. This plane divides the body into front (anterior) and back (posterior) portions. When lateral flexion takes place, such as when a person bends their torso to the side, the movement is side-to-side in relation to the body's midline, which perfectly aligns with the characteristics of the coronal plane. This movement contrasts with others such as flexion and extension, which occur in the sagittal plane, or rotational movements that occur in the transverse plane. Therefore, understanding the spatial orientation provided by the coronal plane is essential for accurately describing lateral flexion movements in biomechanics.