6 Questions
What does the neutral zero method refer to?
A method to measure range of motion starting from 0 degrees to 180 degrees
Which is considered the starting position for measuring range of motion?
Anatomical position with some exceptions
When evaluating active range of motion, what does it specifically measure?
The arc of motion during voluntary muscular contraction
Why should substitute/trick movements be avoided when assessing range of motion?
They provide inaccurate measurements of joint motion
What does it mean when a movement is measured from 0 degrees in rotation?
Halfway between medial and lateral rotation
In what situations would active assisted range of motion be most beneficial?
When muscles are weak and joint movement causes discomfort
Study Notes
Range of Motion (ROM)
- The arc of motion that occurs at a joint or a series of joints.
Measuring Range of Motion
- The starting position for measuring ROM is the anatomical position (except for rotation in the transverse plane).
- The neutral zero method uses a 0-180-degree rotation system, where joints are at 0 degrees for flexion-extension and abduction-adduction when the body is in anatomical position.
- For rotation, 0 degrees is halfway between medial and lateral rotation.
Types of Range of Motion
- Active ROM: The arc of motion attained by a subject during unassisted voluntary motion with active muscular contraction.
- Active Assisted ROM: The arc of motion with a combination of active muscular contraction and external force, used when muscles are weak and joint movement causes discomfort.
- Passive ROM: The arc of motion attained without assistance from the subject by an external force.
Evaluating Range of Motion
- Active ROM should be evaluated to determine the quality and quantity of joint motion comparable to the uninjured limb.
- Active ROM should be assessed in all planes of motion.
- Substitute/trick movements should be avoided to assess the quality of the movement.
Test your knowledge on the normal range of motion of joints with this quiz. Questions cover concepts such as the definition of range of motion, starting position for measuring range of motion, and the neutral zero method for joint rotation.
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