Step 1: Understanding the Concept:
The vertebral column (spine) has natural curves in the sagittal plane (front-to-back), but when viewed from the posterior (behind), it should appear perfectly straight.
Any deviation from this vertical straight line is a spinal deformity.
Step 2: Detailed Explanation:
The question describes a lateral (sideways) curvature.
When the spine bends to the side, it often takes an "S" or "C" shape.
This shift causes the following visible symptoms:
1. Uneven Shoulders: One scapula (shoulder blade) appears higher or more prominent than the other.
2. Uneven Waist: One hip may appear higher than the other.
3. Rib Hump: When the athlete leans forward, one side of the rib cage may protrude more than the other (Adam's Forward Bend Test).
This condition is called Scoliosis.
Comparison with other spinal deformities:
- Kyphosis (Hunchback): This is an excessive outward curve of the upper (thoracic) spine. It makes the person look hunched over.
- Lordosis (Swayback): This is an excessive inward curve of the lower (lumbar) spine. It causes the stomach to stick out and the tailbone to stick back.
- Flat Foot: This is a collapse of the arches of the feet and has nothing to do with the spine directly, though it can cause secondary back pain.
Scoliosis can be caused by unequal leg length, carrying heavy bags on one shoulder, or congenital issues. It is often treated with physiotherapy, swimming, or in severe cases, bracing or surgery.
Step 3: Final Answer:
The lateral (sideways) curvature causing uneven shoulders is known as Scoliosis.