definition of vastus intermedius
The vastus medialis (/ËvÃ¦stÉs ËmÉdiËeÉªláµ»s/ or /ËvÃ¦stÉs ËmÉdiËÃ¦láµ»s/) (vastus internus or teardrop muscle) is an extensor muscle located medially in the thigh that extends the knee. The vastus medialis is part of the quadriceps muscle group.