Biceps Femoris origin?

Biceps Femoris origin?

• A. Iliac crest
• B. Pubic symphysis
• C. Greater trochanter
• D. Ischial tuberosity

Answer: (D)

The biceps femoris has two heads, and the one that crosses both the hip and knee joints—the long head—originates from the ischial tuberosity, the sit bone. The short head, by contrast, arises from the linea aspera of the femur. This is why the ischial tuberosity is the correct origin for the biceps femoris. Other sites listed correspond to different muscles: the iliac crest attaches to muscles like the tensor fasciae latae and gluteus medius, the pubic symphysis to adductors, and the greater trochanter to gluteus medius/minimus and some external rotators.

The biceps femoris has two heads, and the one that crosses both the hip and knee joints—the long head—originates from the ischial tuberosity, the sit bone. The short head, by contrast, arises from the linea aspera of the femur. This is why the ischial tuberosity is the correct origin for the biceps femoris. Other sites listed correspond to different muscles: the iliac crest attaches to muscles like the tensor fasciae latae and gluteus medius, the pubic symphysis to adductors, and the greater trochanter to gluteus medius/minimus and some external rotators.