Frame of Reference Video Flashcards
Frame of reference helps us to define where ___?
Something is in space and how to view movement.
Frame of Reference
A way to describe an objects position in space and whole body orientation alone and with respect to external landmarks.
T/F Frame of reference helps us to define where something is and how to view movement
True
What two FOR do we use?
Global and local (egocentric)
T/F Egocentric (local) frame of reference is referring to the person themselves and allows us to define what is up/down, forward/backward (front/back) and left/right.
True
Plane
In mathematics, a plane is a fundamental two-dimensional object. Intuitively, it may be visualized as a flat sheet of paper of infinite size.
Mid-sagittal plane
Cuts the body into left an right positioned in the middle
Sagittal plane (Medial or midline plane)
Cuts the body into left and right
Any plane parallel to the mid-sagittal plane is called the ____ plane?
Para-sagittal plane or just sagittal
What movements are useful to see from the sagittal plane?
-Running, jumping, olympic lifting
Frontal plane (Coronal) is ____ to the sagittal plane?
Perpendicular
What movements are useful to from the frontal plane?
Tennis, volleyball, agility tests
Transverse plane
Cuts our top from our bottom and is orthogonal (perpendicular) to both the frontal and sagittal planes
What movements are useful to see from the transverse plane?
Rotational movements (i.e. volleyball, soccer, baseball, ballet)
What is an axis?
- Straight line where two planes intersect
- Is a line in which an object may rotate.
- The distance an object is along a certain axis is an important reference position
Where can be define our 0,0 coordinate at?
Where all 3 axis intersect
The intersection of what planes make the Z axis?
Any distance along this axis is measured as an up and down
Frontal and sagittal
The line of intersection of what planes create the Y axis?Any distance along this axis is measured as left and right
Frontal and transverse
The line of intersection of what planes make the x-axis?
Distance along this axis is a measure of front and back
Sagittal and transverse
T/F A global and egocentric axis system is based on a landmark such as the corner of a room, layout of a field or court or a piece of equipment can be used to visualize and instruct movement
True
T/F FOR allows us to guide our observation by aiding us in choosing appropriate viewing angles in order to capture all critical movements within a plane of view.
True
T/F Viewing from different planes will give different perspectives?
True
Where to observe?
- Determine the principal plane of movement
- Or the plane that captures the most important feature of skill - Make sure the line of site (i.e. camera) is perpendicular to the line of movement (i.e. plane)
- Set up other cameras to view the secondary planes of movement (i.e. for sprinting you would set up a camera in the frontal and sagittal plane)
T/F Use parallel axes (parallel lines) to view motion in the frontal, sagittal and transverse planes. You can draw lines in different places on the body (i.e. shoulders, hips, knee, elbows, ankles). In standard anatomical position, these should be in parallel alignment. If not, it could represent improper body alignment.
True
Is the strategy of using parallel lines used to determine postural abnormalities in the frontal plane because drawing the lines enhances the asymmetry?
Yes, it allows the observer to see posture abnormalities
Where do you see improper body alignment in the body with parallel lines in the transverse plane?
Hip and shoulder problems
What about in the sagittal plane?
You can observe pelvic or lumbar tilt (lordosis)
T/F We can also view different styles and performancewith parallel lines
True
T/F We can also view different styles and performance with parallel lines
True
