A rickshaw is run over legs of a child making markings of tyre on the legs. Which type of injury is this?

Patterned abrasion. Patterning of abrasions The patterning of abrasions is clearer than that of bruises because abrasions frequently take a fairly detailed impression of the shape of the object causing them and, once inflicted, do not extend or gravitate; therefore, they indicate precisely the area of application of force. An abrasion (or a graze) is a superficial injury involving only the outer layers of the skin and not penetrating the full thickness of the epidermis. Patterned Abrasions: Patterned abrasions occur when the force is applied at or around right angle to the surface of skin. The classical example of this is seen in traffic accidents when tyre of a motor car passes over the skin leaving the pattern when the skin has been squeezed into the grooves of the rubber tread. Pressure Abrasions (Imprint Abrasions): When the impact is veical to the skin surface, the epidermis gets crushed and pressure type of abrasions result and the imprint of the impacting object may be produced. These may be seen in manual strangulation (abrasions produced by fingernails) and in hanging, where the weave of the ligature material may be reproduced.