Lacerations (or open wounds), such as tears, generally include either external or internal injuries. The severity of brain trauma is usually more obvious on the opposite side of impact because, upon contact with a blunt object, the brain will slide to the opposite side of the skull. Signs of brain contusions are less noticeable and, thus, more difficult to analyze. Initially, victims may feel weakness and pain, and show signs of perspiration. The amount and degree of such discolorations can vary by the victim's weight, where obese people show color more than lean people. As a result, the unbroken skin surrounding the fragmented blood vessels swells and turns dark shades of blue, red, and purple as blood runs into neighboring tissues. The injury occurs when the small blood vessels located beneath the skin are damaged. The signs of contusions appear as a bruise beneath the skin or may not appear at all, only showing up through the use of imaging examinations. Contusions can be caused by blows to the abdomen, chest, or head with a blunt object such as a fist. These injuries are the result of powerful trauma that injures an internal bodily structure (such as the rib cage) without actually breaking the skin. The signs of abrasions usually appear as lines of scraped skin with small areas of bleeding.Ĭontusions usually include either external or internal injuries. These injuries result when the skin is rubbed away by contact with a blunt object (such as a block of wood) or rough surface (such as being dragged across a concrete floor). If severe enough, however, blunt injuries sustained to the head can cause death primarily due to blood clots in the lungs that cause blockage of the major pulmonary arteries or foreign objects that flow to the brain.Ībrasions normally include only external injuries. For the most part, blunt injuries to the human body cause pain and discomfort. The general form of such lesions usually assumes the pattern or characteristic of the impacting blunt object. For the investigations performed by forensic scientists, lesions are usually found to result from assaults and beatings of a victim often in the form of hitting, kicking, punching, or clubbing but they can also occur from accidents such as falls. Blunt injury lesions occur when the skin of the human body makes contact with a blunted object in the form of a crushing impact or penetrating blow. The signs of blunt injuries (also called blunt trauma or blunt force trauma injuries) include lesions such as abrasions (scrapes), contusions (bruises), and lacerations (cuts), but can also include bone fractures and organ ruptures.
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