Shoulder trauma during motor vehicle collisions is another common cause of brachial plexus avulsions. Soft tissue injuries include abrasions, lacerations, avulsions, bruises, burns and cold injuries. Microvascular surgery is another method of repair but is rarely used to treat eye avulsions. After several avulsions, the channel roughly followed the pre-1951 flood path. The researchers found tendon avulsions only among "Tyrannosaurus" and "Allosaurus". The most common avulsion injury, skin avulsions usually occur during motor vehicle collisions. Avulsions usually occur as a downstream to upstream process via head cutting erosion.