Week 3 Flashcards
What is 1 gait cycle
Heel strike of 1 foot to heel strike of the same foot
During walking, stance phase is
60% of gait cycle
Is when the foot is in contact with the ground
During walking, swing phase is
40% of gait cycle
Is when the foot is not contacting the ground
Double limb support in walking makes up
20%
Single limb support in walking makes up
80%
A step is
heel strike on 1 side to heel strike on opposite side
A stride is
Right and left step (1 gait cycle)
Step width is measured from
The middle of the foot (2nd toe)
Someone who has a larger than average step width and shorter than average step and stride length indicates what
The person is trying to improve their base support
Maybe due to weak hips or lack of stability
What are the technical considerations of 2D motion analysis
Camera position - plane, tilt and field of view
Camera image quality
Frame rate - minimum 30 Hz
Anatomical position is
The standard reference position
Joint angles (clinical angles) are
Zero in anatomical position
The absolute angle is
almost never the clinical angle
Frontal plane angles involve what type of movements
Inversion
Eversion
Abduction
Adduction
Angle at initial contact is
The very first angle when the foot first touches the ground
Peak angle is
The most extreme angle
How do you get “normal data”
Published in literature
Collect your own data and find the average
Use a program with normative data built in
During walking, heel strike of one limb to heel strike of the other (contralateral) limb is called a ___________
Step
Swing phase comprises what percentage of the gait cycle
40%
Only one limb is in contact with the ground (as opposed to both limbs) for approximately what percentage of the gait cycle
80%
At the end of swing phase, your leg decelerates before the next heelstrike
True
Step width is the horizontal distance from the outside edge of the left foot to the outside edge of the right foot during one step
False
What is generally considered the minimum acceptable frame rate for 2D motion analysis? (Hint: this is the frame rate most of you used during lab)
30 frames/sec
More often than not, the absolute angle you measure between segments during 2D motion analysis is also the clinical angle
False
How can you tell if a patient’s kinematic gait data is “normal”
Collect a bunch of data on healthy individuals, yourself and find the average
Fancy program that has normative data programmed into it
Compare data to what is in the literature
If an individual feels unstable during walking, their gait may be characterized by
Shorter and wider steps
The frontal plane hip angle (hip ab/adduction) is measured in reference to a 90-degree angle between the pelvis and thigh
True
