The arrow is pointing to the greater trochanter of the femur.
The greater trochanter is a large quadrilateral eminence which forms the site of origin and insertion for several muscles:
Origins: vastus lateralis
Insertions: gluteus medius, gluteus minimus, obturator internus, piriformis
The greater trochanter has two surfaces:
At the base of the greater trochanter is a deep depression known as the trochanteric fossa. Posteriorly is the intertrochanteric crest. The trochanteric fossa serves as the point of insertion for four muscles:
- Obturator externus
- Obturator internus
- Superior gemellus
- Inferior gemellus
The greater trochanter has four borders:
Learn all about the muscles of the thigh in this tutorial.
Learn all about the features of the femur in this tutorial.