Frequently Asked Questions about Clinical Gait Analysis
So how do you go about teaching them something new? By mixing what they
know with what they don't know. Then, when they see vaguely in their fog
something they recognize, they think, "Ah, I know that." And then it's
just one more step to, "Ah, I know the whole thing." And their mind thrusts
forward into the unknown and they begin to recognize what they didn't know
before and they increase their powers of understanding.
Pablo Picasso, in Life with Picasso (Francoise Gilot and Carton
Lake, 1965)
Introductory
textbooks on gait
analysis
history of biomechanics,
gait and motion analysis
Gait Analysis Courses
around the world
Classification
of Gait Abnormalities
Gait
Cycle Terminology
Concept map for understanding
gait biomechanics
Clinical Issues & Observational Gait Analysis
gait symptoms
observational gait
analysis
painful & antalgic
gait
10 main pointers to
look for
The limping
child: diagnosis and management
adults with cerebral
palsy
Practical difficulties
how big does a gait
lab need to be?
hitting the force-platform
estimating foot
contact and toe-off with kinematic data
effect of walkway
carpeting
effect of shoes
methods for attaching
markers
reliability of marker
placement
effect of walking aids
effect of arm-swing
on gait
gait analysis with
orthoses
physiological cost index
(PCI)
making simple foot
switches
centrifugal force
& inertial frames
treadmill gait
turning gait
digital video camcorders
statistics
what's
wrong with significance testing?
Identifying segment locations
2D angle calculation - notes,
spreadsheet
methods for representing
3D angles
foot models
The Direct Linear
Transform
marker identification
marker-less tracking
common marker sets
choice of marker
set
hip joint center defintion
varus/valgus artifact
& Cleveland marker set
marker-skin motion
coefficient of variation
Smoothing & differentiation
interpolation of missing markers
optimal filtering
vs. fixed cutoff frequency
choice of cut-off
frequency
accuracy of differentiation
EMG
quantification
measures
determination of
onset times
Normalisation
normal data for adults
and children
gender effects
Body mass
& Stature or limb-length
Time
Velocity, cadence
& stride length
Variability in joint
moment & power patterns
Anthropometry & Modeling
Joint centre estimation
Hip-joint centre estimation
Knee anthropometry
measurement vs. regression estimation
Accuracy requirements
Prostheses
Modeling techniques used
in gait analysis
Understanding gait
kinematics
the Determinants
of Gait
forces &
moments
friction &
resolving forces
origin of ground reaction
forces
center of pressure
calculating the centre of pressure
inverse-dynamics
hip activity around initial
contact
passive vs. active
dynamics
interpretation of joint moments and powers
segment powers
balance
control of motion
& locomotion
central pattern generators
(CPGs)
the spinal engine
how many steps do
we take in a year?
femoral anteversion
& tibial torsion
File Formats
the C3D file format
the GCD and DST format
And frequent administrative questions...
how much to charge
for a gait analysis, how many patients per week?
how to start a gait-lab?
how big does a gait
lab need to be?
applications
of clinical gait analysis
prevalence of
joint symptoms in US
what to call a gait
lab?
Back to Clinical Gait
Analysis home page
Maintained byDr
Chris Kirtley
Last modified on 16-Feb-2005