The spine curves away from the middle or sideways.

During lordosis, the spine curves so that the apex points in the ventral direction.

When the spine curves too far inward, the condition is called lordosis or swayback.

The spine curves to the anterior, keeping the head lifted to focus straight forward to diagonally up.

Scoliosis is a condition in which the spine curves abnormally from side to side, rather than being straight.

In most mammals, the lumbar region of the spine curves outward.

When the upper spine curves, the lower back makes adjustments to keep the body in balance, which may cause muscle pain.

But when a person has scoliosis, the spine curves from side to side, often in an S or C shape.

To varying degrees, the spine curves from side-to-side, and some of the spinal bones may rotate slightly, making the hips or shoulders appear uneven.

The spine curves from side to side rather than being straight.