Trochanteric fossa

Trochanteric fossa is a deep, cup-shaped depression located at the upper and back part of the femur, specifically on the medial side of the greater trochanter. It is also known as the digital fossa due to its resemblance to a finger impression.

Etymology

The term "trochanteric" is derived from the Greek word "trokhántēr" which means "runner." The term "fossa" is derived from the Latin word "fossa," which means "ditch" or "trench."

Anatomy

The trochanteric fossa is a significant anatomical feature of the femur, the longest and strongest bone in the human body. It is located on the medial side of the greater trochanter, a large, irregular, quadrilateral eminence that is palpable in the upper, outer part of the thigh. The fossa is directed medially and downward, and it is bounded by three prominences, two of which can be traced to the posterior border of the base of the neck of the femur.

Clinical Significance

The trochanteric fossa is a site of attachment for several muscles, including the obturator internus and gemelli muscles, which are part of the lateral rotator group of the hip muscles. These muscles play a crucial role in the movement and stability of the hip joint. Any injury or disease affecting these muscles or their attachment to the trochanteric fossa can lead to hip pain and mobility issues.

Related Terms

• Femur: The thigh bone, the longest and strongest bone in the human body.
• Trochanter: One of two bony prominences near the top of the femur.
• Obturator internus: A muscle in the pelvic region that helps rotate the hip.
• Gemelli muscles: A pair of small muscles in the hip region that assist in rotating the thigh.

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