What mechanical action does positional traction primarily seek to achieve?

Positional traction primarily aims to straighten the spine. This method of traction involves applying a gentle, sustained force to the spine in a specific position that encourages the natural alignment of vertebrae and the decompression of intervertebral discs. By using positioning to facilitate this stretching, it helps to relieve tension and pressure on the spinal structures.

While some other actions, like realignment of vertebrae, may be secondary effects of proper spinal positioning, the primary goal within the context of positional traction is indeed to enhance the straightness of the spine. The focus is on promoting proper posture and alleviating discomfort associated with misalignment or spinal deformities.

The other choices—compressing the spine or strengthening core muscles—do not accurately reflect the purpose of positional traction; in fact, compressing the spine would counteract the objectives of traction, while strengthening core muscles is typically addressed through different types of therapeutic exercises not related to traction techniques.