List and describe the four quadriceps muscles, including location, actions, and possible injury implications in the case of imbalance.
Rectus femoris- Action:extension of the knee.
Vastus lateralis-
Vastus medialis-
Vastus intermedius-
All: extends the knee, attaches distally to the patellar tendon, and inserts on the tibia.
Injury: Will compromise balance in the knee