AUGUST 2017 Sub. Code :2406
B.Sc. PROSTHETICS AND ORTHOTICS
FIRST YEAR
PAPER VI BIOMECHANICS I
Q.P. Code: 802406
Time: Three Hours Maximum 100 Marks
Answer All questions
I. Elaborate on: x 10 30)
1. What is a joint? Discuss structural and functional classification of a Bone.
2. Explain with the help of a diagram, kinematics of hip joint during one gait cycle.
3. How many rockers are present in one gait cycle? Explain them with the help
of a labeled range of motion graph.
II. Write notes on: x 5 40)
1. Why is skin preparation needed before you record surface EMG?
2. What is whip? Discuss the reasons for whip in trans femoral prosthesis user.
3. Discuss third law of motion by citing an example?
4. Draw a labeled diagram and explain load deformation curve for connective tissue.
5. What do you understand by eccentric contraction of a muscle? Explain with an
example.
6. Explain stress relaxation with an example?
7. Define degree of freedom? How many degrees of freedom does hip joint have?
Show them with the help of diagram.
8. A block of mass 100 Kg in weight, tied to a string is pulled by three persons B
and C in the directions as shown in the fig 1. What will be the resultant force
acting on the mass and what will be its direction?
Figure 1
Person C 100 N
Person A 100 N
Person B 100 N
450
100 Kg
450
III. Short answers on: (10 x 3 30)
1. Define Energy. What is its SI unit and dimension?
2. Is velocity a vector or a scalar quantity? Justify with an example.
3. What is osteokinematics?
4. What is the advantage of instrumental gait analysis over conventional video gait
analysis?
5. Write short notes on biomechanics of Symes prosthesis. Explain with the help of a
diagram.
6. If a trans femoral prosthetic user exerts 750 N against the ground during push off
phase of the gait. How much force will the ground exerts on the person? Assume
the weight and height is 62Kg and 160cm respectively.
7. Consider the partial knee illustrated in the figure 2. The forces applied by
quadriceps FQ =10 N and patella tendon Fp 10 N respectively. Calculate the
magnitude and direction of the resultant force on the patella due to forces applied
by quadriceps and patella tendon.
8. In which plane will you record movement of medial and lateral rotation of pelvis?
Draw the corresponding plane showing this movement.
9. What do you mean by concurrent forces? Comment on the direction of resultant
force if two concurrent forces are acting on a object in opposite direction?
10. Name the different arches of foot?