More examples. The principal aim of this meeting is to reach a decision that we all agree on. The diaphragm is the principal muscle of respiration. I would like to earn more, but this isn't my principal reason for leaving the job. He can't give up teaching, it's his principal source of income.
Quadriceps femoris. The quadriceps femoris is a group of muscles located in the front of the thigh. The Latin translation of quadriceps is four headed, as the group contains four separate muscles: the vastus lateralis, vastus medialis, vastus intermedius, and the rectus femoris.uadriceps femoris. The quadriceps femoris is a group of muscles located in the front of the thigh. The Latin translation of quadriceps is four headed, as the group contains four separate muscles: the vastus lateralis, vastus medialis, vastus intermedius, and the rectus femoris.
One of your quadricep muscles, the rectus femoris, helps to flex your hip. Other hip flexors include the iliopsoas muscles in your upper thigh and lower back; the tensor fasciae latae on your outer hips; the adductor longus, adductor brevis and pectineus along your upper, inner thighs; and the sartorius.he four quadriceps muscles in the front of each thigh are primarily responsible for extending your knee. When your foot moves forward and your leg straightens during your sprinting stride, that's the quadriceps hard at work.