During a wheelie performed for pressure relief, which anatomical structure bears the load?

During a wheelie performed for pressure relief, which anatomical structure bears the load?

• A. Sacrum and coccyx
• B. Spinous processes of the spine
• C. Greater trochanters
• D. Posterior superior iliac spines

Answer: (B)

In a wheelie for pressure relief, the weight shifts toward the posterior spine, and the load is transmitted along the vertebral column. The spinous processes are the posterior bony projections that align along the midline of the spine and are the main structures that bear axial compressive load when you lean back and hold that position. They act as the contact interface along the back, distributing weight along the spine. The sacrum and coccyx sit at the base of the spine and pelvis and are not the primary load-bearing contact in this posture. The greater trochanters and posterior superior iliac spines are part of the pelvis and hip region and do not take the main axial load during a wheelie.

In a wheelie for pressure relief, the weight shifts toward the posterior spine, and the load is transmitted along the vertebral column. The spinous processes are the posterior bony projections that align along the midline of the spine and are the main structures that bear axial compressive load when you lean back and hold that position. They act as the contact interface along the back, distributing weight along the spine.

The sacrum and coccyx sit at the base of the spine and pelvis and are not the primary load-bearing contact in this posture. The greater trochanters and posterior superior iliac spines are part of the pelvis and hip region and do not take the main axial load during a wheelie.