Which movement describes spinal extension?

Spinal extension refers to the movement where the angle between the body parts increases. Specifically, when extending the spine, the back bends backward, allowing the thoracic and lumbar regions to open up, thereby increasing the angle between the upper and lower body. This movement is essential in various activities and helps maintain proper posture by counteracting the effects of flexion, which can occur due to sitting for long periods or other forward-bending activities. It's a critical component of spinal mobility and overall body mechanics.

This understanding of extension contrasts with other movements such as flexion, which decreases the angle between body parts; lateral movement, which involves side bending; or twisting, which involves rotational motion. Each of these movements serves a different purpose in spinal function and body mechanics.