Chapter 9.2, Problem 11BYGO

Why can you lift a larger load when your elbow is slightly flexed and your biceps muscle is at an intermediate length than you can when your elbow is fully extended?

What type of lever is the vastus medialis? Support your answer with a free body diagram. The vasti muscles are used both for sit-to-stand AND stand-to-sit movements. Which of these two tasks represents a concentric contraction and which represents an eccentric contraction? Which muscle (vastus lateralis or medialis) do you think is more important for doing a slow, controlled stand-to-sit transition? If you witnessed your grandfather "plopping" (doing an uncontrolled sit) into a chair, would you recommend giving him eccentric or concentric strengthening exercises for his vasti muscles? Justify your answer.

Discuss the functions of the different types of levers found in our body. How do these different types of levers make our body more useful. Explain each type of lever, the position of the fulcrum, load, and applied force and give an example of each.

IF a patient is unable to dorsiflex his or her foot.Which muscle do you think would be involved in this condition? which muscle may have to compensate for lack of dorsiflexion during walking?

what movement does the hip joint make when starting the stance phase of a normal gait cycle?

Utilize the attached picture. She leads with her right leg. A. What motion is occurring in the left knee from A to B? B. What muscles are acting on the right knee from A to B? C. How is the knee musculature acting on the left knee from B to C? D. What plane of of motion is the exercise occurring in (lower extremity only)? E. What muscles are acting on the left knee joint from A to B? F. How is the right ankle musculature acting from A to B?

What movement does the hip joint make when starting the stance phase of a normal gait cycle? Moves from knee extension to mostly neutral Moves from hip extension to hip flexion Moves from hip flexion to hip extension Moves from dorsiflexion to plantar flexion

Consider only the effect of the brachioradialis muscle for these questions: If a weight is held in the hand and the forearm is flexed, whattype of lever system is in action? If the weight is placed on the forearm? Which system can lift more weight, and how far?

Which of the following is the antagonist when using a hand grip strengthener?  Flexor Digitorum superficialis Extensor Digitorum Longus Palmaris Longus Extensor Digitorum