Biom 1.4 Flashcards
Define center of mass
Point in space where the mass of an object is evenly distributed
Define moment of inertia
Resistance of a body to rotation about a given axis
The military applications are?
Aircraft
Spacecraft
Equipment
The application of biomechanical are
Crash test dummies
Inverse dynamics
Simulations
What are the typical measures needed and why?
Segment mass
Location of center of mass
Moment of inertia
With this information we can perform an analysis of limb motion
The methods of measurement are?
Amputation
What are the physical methods of measurement
Cadavers
The figuratively method of measurement are
Estimate segment shapes and imaging
What did imaging method do? And what was the problem with imaging methods
Imaging techniques allow determination of tissue volume and density
The problem was time and access
What is a model
A model is a representation of a system in a useable form
What is a physical model
Physical objects represent the systems
What is a mathematical model
Equation are used to describe the system, variables represent the input and output of the system
Advantages and disadvantages of crash test dummies
ad-
Can’t perform test with humans
Dis-
Difficult to determine what injures would have occurred
What are the two example of the parameters to a model
Projectile motion-direct physical representation
Muscle function-cannot be predicted
What are the properties of a good model
- robust
- easy to use and understand
- state assumptions clearly
- simple
What is the goal of modeling
Measuring things that cannot be measured
Produce a more complete understanding of a phenomena
Determine what muscles are active
What are the application of modeling in biomechanics
- Investigate sport techniques
- Design better replacement joints
- Used to investigate muscle of joint function
- hypothetical surgeries
What are the some benefits of investigating sport technique
Safer than just trying it and easy to validate
What are some benefits of design better joint replacement
Predict lifetime of replacement and range of motion
Dis- very difficult to test in real life
Benefits of muscle function
Compare model results to measured values from real muscles
Benefits of hypothetical surgeries
Can perform as many surgeries as necessary
Define anthropometry
Measurement of the human body
