Definition of principal for English Language Learners. : 1  the person in charge of a public school. : 2  the person in charge of a university or college. : 3  an amount of money that is put in a bank or lent to someone and that can earn interest.
A quadriceps contusion is one of the more common injuries seen in athletes competing in contact sports and results from a direct blow to the front of the thigh.This type of injury often goes undertreated and may result in serious complications for the athlete.ecause of the location of the quadriceps, they can be subject to direct blows during sports competition. A deep quadriceps contusion can be one of the most disabling injuries for an athlete because injury to these muscles can severely impact an athleteâs ability to effectively use his/her leg.
The quadriceps are a group of muscles on the front of your thighs. As you may guess from the name, there are four distinct muscles that make up the quadriceps muscles. These muscles are called the vastus intermedius, the vastus medialis, the vastus lateralis, and the rectus femoris. The quadriceps are also known simply as the quads. If you sit in a chair and straighten your knee a few times, you can see and feel the quads in action on the front part of your thigh.