Physical Therapy Assistant Practice Exam 2026 – Complete Prep Guide

In the supine position, the body is aligned horizontally on its back, which affects how pressure is distributed across various bony prominences. The spinous processes, which are the bony protrusions along the spinal column, are generally protected in this position due to their alignment and less direct contact with the support surface.

Unlike other bony prominences, such as the patella, anterior superior iliac spine, and anterior shoulder, which make direct contact with the bed or surface and can experience increased pressure from body weight, the spinous processes are cushioned by the surrounding musculature and soft tissues. This reduces the risk of pressure sores in the area. Understanding this anatomical relationship is crucial in physical therapy and patient care, particularly in preventing pressure injuries in individuals who may have limited mobility.