The relationship between additional heads of the quadriceps femoris, the vasti muscles, and the patellar ligament

Figure 2

Scheme of type II quadriceps femoris. (a) Type IIA quadriceps femoris: TVI: tensor vastus intermedius; SVL: superficial part of the vastus lateralis; IVL: intermediate part of the vastus lateralis; VI: vastus intermedius, VM: vastus medialis. (b) Type IIB quadriceps femoris: TVI: tensor vastus intermedius; SVL: superficial part of the vastus lateralis; IVL: intermediate part of the vastus lateralis; VI: vastus intermedius; VM: vastus medialis. (c) Type IIC quadriceps femoris: TVI: tensor vastus intermedius; SVL: superficial part of the vastus lateralis; IVL: intermediate part of the vastus lateralis; GM: gluteus minimus; tGM: gluteus minimus tendon.

(a)

(b)

(c)