0 Recommended: Using your anatomy references, sketch a realistic (not schematic) figure of the muscles and bones in the knee. Label the components of the quadriceps, the patella, femur, femoral condyles, and tibia. Draw a stick figure of the body as seen from the side. Label the necessary joints, body weight, lengths, and angles. You may model the rotational centers for the hip, knee and ankle as simple (pinned) joints. Derive a simple formula for Mк,the moment that the body weight generates in the knee. Draw a side view section of the knee, including the bones, ligament(s), tendon(s), and muscle(s) that are relevant to the knee analysis. The femur should include the shaft and the condyles, even though they do not lie in exactly the same plane. Identify the specific attachment points (origin and insertion of the muscle/tendon) that you would use if you were modeling the muscle and patella as a multi-part cable, noting that most of them attach over some range, not a point. o Identify the center of rotation of the knee. Label the following lengths and forces as variables. Note that forces are vectors, so each one should be assigned a magnitude and an angle (or x and y components). Moment arm Ly from the center of 0 Force exerted by the vastus muscles on the quadriceps tendon (Fv) o Force exerted by the the patellar ligament on the tibia (FPL) o rotation to Fv. O 0 0 Moment arm LPL from the center of rotation to FPL. Note that Lvand LPL are not the lengths of the vastus muscle or patellar ligament. Derive simple expressions for Fv and FPL as a function of the moment in the knee. o Treat the patella as the free body, subject to forces Fy and FPL and the force due to the condyle on the patella (Fc). Do not assume that Facts horizontally, but it is fine if your calculations below show that it is horizontal. o Derive a simple expression for the force vector Fc.
0 Recommended: Using your anatomy references, sketch a realistic (not schematic) figure of the muscles and bones in the knee. Label the components of the quadriceps, the patella, femur, femoral condyles, and tibia. Draw a stick figure of the body as seen from the side. Label the necessary joints, body weight, lengths, and angles. You may model the rotational centers for the hip, knee and ankle as simple (pinned) joints. Derive a simple formula for Mк,the moment that the body weight generates in the knee. Draw a side view section of the knee, including the bones, ligament(s), tendon(s), and muscle(s) that are relevant to the knee analysis. The femur should include the shaft and the condyles, even though they do not lie in exactly the same plane. Identify the specific attachment points (origin and insertion of the muscle/tendon) that you would use if you were modeling the muscle and patella as a multi-part cable, noting that most of them attach over some range, not a point. o Identify the center of rotation of the knee. Label the following lengths and forces as variables. Note that forces are vectors, so each one should be assigned a magnitude and an angle (or x and y components). Moment arm Ly from the center of 0 Force exerted by the vastus muscles on the quadriceps tendon (Fv) o Force exerted by the the patellar ligament on the tibia (FPL) o rotation to Fv. O 0 0 Moment arm LPL from the center of rotation to FPL. Note that Lvand LPL are not the lengths of the vastus muscle or patellar ligament. Derive simple expressions for Fv and FPL as a function of the moment in the knee. o Treat the patella as the free body, subject to forces Fy and FPL and the force due to the condyle on the patella (Fc). Do not assume that Facts horizontally, but it is fine if your calculations below show that it is horizontal. o Derive a simple expression for the force vector Fc.
Chapter20: Radiology And Diagnostic Imaging
Section: Chapter Questions
Problem C1CRE
Related questions
Question
Please help with the pictures given a sketch for each bullet point and with the calculations.
Transcribed Image Text:0
Recommended: Using your anatomy references, sketch a realistic (not schematic)
figure of the muscles and bones in the knee. Label the components of the
quadriceps, the patella, femur, femoral condyles, and tibia.
Draw a stick figure of the body as seen from the side. Label the necessary joints,
body weight, lengths, and angles. You may model the rotational centers for the hip,
knee and ankle as simple (pinned) joints. Derive a simple formula for Mк,the
moment that the body weight generates in the knee.
Draw a side view section of the knee, including the bones, ligament(s), tendon(s),
and muscle(s) that are relevant to the knee analysis. The femur should include the
shaft and the condyles, even though they do not lie in exactly the same plane.
Identify the specific attachment points (origin and insertion of the muscle/tendon)
Transcribed Image Text:that you would use if you were modeling the muscle and patella as a multi-part
cable, noting that most of them attach over some range, not a point.
o Identify the center of rotation of the knee.
Label the following lengths and forces as variables. Note that forces are vectors, so
each one should be assigned a magnitude and an angle (or x and y components).
Moment arm Ly from the center of
0 Force exerted by the vastus muscles on the quadriceps tendon (Fv) o Force exerted
by the the patellar ligament on the tibia (FPL) o
rotation to Fv. O
0
0
Moment arm LPL from the center of rotation to FPL.
Note that Lvand LPL are not the lengths of the vastus muscle or patellar ligament.
Derive simple expressions for Fv and FPL as a function of the moment in the knee.
o Treat the patella as the free body, subject to forces Fy and FPL and the force due to the
condyle on the patella (Fc). Do not assume that Facts horizontally, but it is fine if
your calculations below show that it is horizontal. o Derive a simple expression
for the force vector Fc.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
Recommended textbooks for you