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0 Exakte Antworten 84 Text Antworten 0 Multiple Choice Antworten
Fenster schliessen
State the two functions of the joints of the lower limb.
The two main functions of the joints of the lower limb are movement and weight bearing.
Fenster schliessen
What type of joint is the hip joint?
The hip joint is a ball-and-socket type synovial joint.
Fenster schliessen
What are the two functions of synovial fluid?
Synovial fluid lubricates the joint and provides nutrients to the articular cartilage.
Fenster schliessen
Why is the hip joint intrinsically stable?
The hip joint is intrinsically stable due to its shape, its strong joint capsule and the surrounding ligaments and muscles.
Fenster schliessen
In which plane does the greatest range of motion of the hip joint occur?
The greatest range of hip joint motion occurs in the sagittal plane.
Fenster schliessen
Typically, what range of motion is required at the hip joint to stand up and sit down?
Typically around 110° of flexion-extension, 20° of abduction-adduction and 15° of rotation is required to stand up and sit down.
Fenster schliessen
Express the magnitude of abductor muscle force as a ratio of the subject’s total body weight.
The abductor muscle force is 1880 N and the subject's total body weight is 800 N thus the magnitude of the abductor muscle force is equal to 2.4 times the subject's total body weight.
Fenster schliessen
How does the abductor muscle activity affect the hip joint force during unilateral stance compared to bilateral stance?
Muscle activity generally increases the magnitude of the joint forces by pulling the two sides of the joint together. During unilateral stance the contraction of the hip joint abductors acts in this way, causing a large increase in the joint force as compared to bilateral stance when there is usually no muscle activity.