Hip Hip In vertebrate anatomy, hip (or "coxa" in medical terminology) refers to either an anatomical region or a joint. The hip region is located lateral and anterior to the gluteal region (i.e., the buttock), inferior to the iliac crest, and overlying the greater trochanter of the femur, or "thigh bone". In adults, three of the bones of the pelvis have fused into the hip bone or acetabulum which forms part of the hip region. The hip joint, scientifically referred to as the acetabulofemoral joint ("art. coxae"), is the joint between the femur and acetabulum of the pelvis and its primary
Muscles of the hip the tibia/fibula, have a large moment assisting with hip extension. Movements of the hip occur because multiple muscles activate at once. Most muscles are also responsible for more than one type of movement. Movements of the hip are described in anatomical terminology using anatomical terms of motion. The movement that brings the thighs close to the abdomen is called "flexion". When the legs open, such as in the lotus posture of yoga, this is called "lateral rotation", with the opposite movement called "medial rotation". Hip abduction occurs when the femur moves outward to the side, as in taking the thighs