Scalp injury

The scalp is a surface barrier against external violence in the skull and brain. It has great elasticity and toughness, and has strong resistance to stress and tension. Therefore, violence can be introduced into the skull through the scalp and skull, causing damage to brain tissue, while the scalp is intact or slightly damaged. The structure of the scalp is significantly different from the skin of other parts of the body. The surface layer is dense with hair, rich in blood flow, and the subcutaneous tissue structure is dense. There is a short fiber septum that connects the surface layer, subcutaneous tissue layer and cap-shaped aponeurosis layer. The trinity is not easy to separate. In the meantime, it is rich in fat particles and has a certain protective effect. There is a loose connective tissue gap between the cap-shaped aponeurosis and the skull periosteum, which allows the scalp to slide, so it has the effect of buffering external violence. Scalp injury is the most common type of primary craniocerebral injury, and it can range from a slight abrasion to avulsion of the entire scalp. The significance is that the scalp injury helps to determine the location and severity of the brain injury. Scalp injuries often have varying degrees of skull and brain tissue damage, which can be used as an invasion portal for intracranial infections and cause secondary lesions in the skull. Therefore, reconstruction of scalp injuries has received increasing attention.