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

Figure 8

Types of TVI muscles according to Grob et al. [4]. (a) Independent type. (b) VI type. (c) VL type. (d) Common type. (e) Two muscle bellies type. P: patella; VL: vastus lateralis muscle; VI: vastus intermedius; VM: vastus medialis; TVI: tensor vastus intermedius.

(a)

(b)

(c)

(d)

(e)