One of the most important aspects of the human bipedal gait is the forward propulsion generated by the extension of the leg behind the body (movement of the leg anterior to the body is referred to as flexion). The primary muscle involved in this action is the gluteus maximus, the largest muscle in the human body.While one leg is extending backwards, the other leg is moving forward. A group of muscles that includes the gluteus medius (which inserts into the greater trochanter of the femur) help stabilize the hip joing during this "swing phase," preventing the hip from dipping inferiorly.Looking at the posterior surface of the proximal human femur above, the attachment of the gluteus maximus (the posterior/inferior margin of the greater trochanter, extending inferiorly in a raised bony structure called the linea aspera) and the gluteus medius (the superior margin of the greater trochanter) are both visible.Thinking about the locomotor posture and behavior of a chimpanzee, would you expect to see the same pattern of morphology on the femur of a chimp?
A: Yes
B: No
A: Yes
B: No
举一反三
- When practicing the movements on the bar, if one hand on the bar, the leg which is away from the bar leg and does all kinds of open and return to the original action is considered as the power leg; the leg which is close to the bar or responsible for carrying the body weight is called the main leg.
- 中国大学MOOC: Which of the following is a palpable sign of femur on the body surface?
- A horizontal plane divides the body into which of the following? A: superior and inferior portions B: distal and proximal portions C: anterior and posterior portions D: internal and external portions
- Rapid travel has a ____ greater influence on the human body than we imagine.
- The correct position of leg extension is to keep the main leg tight and straight while the other leg responsible for providing strength stretches the foot and the toe stretches and pulls the main leg to the knee.