BIO ENG C119 Study Guide - Erector Spinae Muscles, Fibular Collateral Ligament, Osteoporosis
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Please write all answers in the space provided. If you need additional space, write on the back sides. Indicate your answer as clearly as possible for each question. Write your name at the top of each page as indicated. _____________________________________________________________________________: (15 points total) forces and moments at joints, estimate the force (in terms of body weight) acting in the erector spinae muscles (spine extensors) for holding a weight of one-tenth body-weight with arms outstretched and back bent. State all assumptions: development of abdominal pressure is thought to decrease loading of the spine, but this is controversial. Briefly explain this controversy using free-body diagrams to support your analysis. Figure 1 shows a simplified diagram of the head, rotating in the counter clockwise direction about the fixed point o, which is the center of the occipital condylar joint at the base of the head.
