Which physical examination technique involves striking the body to assess underlying structures?

The physical examination technique that involves striking the body to assess underlying structures is percussion. This method is used to produce sounds by tapping on the surface of the body, which helps in evaluating the size, shape, and density of underlying organs and tissues. The sound produced can indicate whether the underlying structure is solid, hollow, or filled with fluid, providing valuable diagnostic information.

In a clinical setting, percussion can be employed over various body regions, such as the chest or abdomen, to help diagnose conditions like pleural effusion or liver enlargement. It is particularly useful because it can reveal abnormalities that might not be immediately apparent through other techniques, allowing healthcare providers to gather more comprehensive data during a physical assessment.