Hi, welcome to all of physio's helping hand (physiogk) family members. Today we will discuss how to write the answers to 5 marks question Angle of pull
Contents:-
In exercise therapy, this question is frequently asked in university exams or internal exams also. If you will answer it properly you can score a good mark. So in this blog, we tried to explain how to write the answer of angle of pull.
Introduction and Definition of angle of pull
It is an angle formed between the line of pull of a muscle and the longitudinal axis of the bone in which the muscle is acting.
Mainly it is used to describe the angle of any muscle and the bone to which it is attached.
This term is frequently used by medical professionals such as physiotherapists and orthopedists and also used by weight lifters and bodybuilder
The physiotherapist uses the angle of pull to measure a patient's rehabilitation progress over the time
Mechanical efficiency of muscles
Mechanically, when the muscle is inserted at the right angle to the bone the pool/force is most efficient
This efficiency is decreased as the angle of pull is reduced because some of the force is used in pulling the bone of insertion toward the joint representing the fulcrum.
The approximation of the articular surface has a stabilizing effect upon the joint which is greatest when the direction of the pull of the muscles is longitudinal.
The mechanical efficiency of muscle pull is also reduced when the angle of insertion is increased from the right angle joint because joints become less stable as the angle increases.
Ex- Triceps Siri insert on calcaneum perpendicular provide large moment of arm
The efficiency of a resistance
When a force is applied at right angles to the lever against the movement, the resistance to that force is maximum.
If the angle of pull is greater or less than 90 degrees then the resistance will decrease.
A force offering resistance to the movement of one of the body's levers may be applied by means of a rope or by the hand of a physiotherapist.
The effect of this resistance force is maximum when it is applied at right angle to the moving bone.
During the course of movement when the angle of pull must vary, the right angle pull is employed in that part of the range that requires maximum resistance.
Tips for exam
This question comes in 5 marks question so write it in the proper heading and subheading. You must add at least one diagram, it will help you grab extra marks from others.
Terms used in this blog:-
1. What is line of pull of a muscle
2. The longitudinal axis of the bone
3. Mechanical efficiency
Thank you
physio's Helping Hand
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