The quadriceps femoris (also called the quadriceps extensor, quadriceps or quads) is a large muscle group that includes the four prevailing muscles on the front of the thigh.
股四头肌（也 称为 股四头肌伸肌 或 四头肌）是 一个 大肌肉群，包括 大腿 前部的 四个 主要 肌肉。
