Anthropometry Flashcards
(42 cards)
Anthropometry
Measurement of the human body segments
Anthrompometric Measures
-mass
-moment of inertia
-COM
mass
amount of matter in a body, it’s resistance to acceleration
COM
center of mass: balance point about which free rotation occurs, all mass is equally distributed
MOI
moment of intertia: property describing resistance to angular acceleration, increases as mass is located farther from axis of rotation
inertial properties
mass, moi, com
body segments
-rigid body structures
-may be composed of small segments
-may be combined (HAT)
examples of body segments
feet, shank, thigh, trunk, upper arm, forearm, hands, head
Sum of Segment
mass * total mass
Segment average
(x1+x2)/2 =
COM Formulae
xcom
x coordinate com
m1
mass of first segment
m2
mass of second segment
mb
mass of whole body
x1
x coordinate of first segment COM
x2
x coordinate of second segment center of mass
ycom
y coordinate COM
y1
y coordinate of first segment com
y2
y coordinate of second segment com
Commonly Used Alternatives For Segment Estimations
-cadaver
-mathmatical modesl
-scanning/imaging
-kinematic techniques
How much does your thigh weight?
~9.7% of body weight
Format of Dempster Studies
8 older males
Cadaver study -cockpit design
Harless Studies
Cadaver Study
2 decapitaded males