UF_Lecture_4_Systems-level_Approaches

Accurate prediction of muscle forces depends on p p

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Unformatted text preview: curate prediction of muscle forces depends on p p correct values of model parameters that are difficult or impossible to measure. Description of joint mechanics has a significant impact on calculated muscle forces. Why? Choice of optimization cost function can have a significant impact on calculated muscle forces. What is the right cost function for normal and impaired subjects? Direct validation of predicted muscle forces is impossible. Buchanan et al (2004) Overview al. Four Step P F -St Process to Estimate Muscle Forces Fourt E ti t M l F Step 1: Neural signal to muscle activation Step 2: Muscle activation to muscle force Step 3: Muscle force to muscle moment Step 4: Muscle moment to skeletal motion External Forces and Moments Neural Command C 1 , 2 Musculotendon d Dynamics F1 F2 Musculoskeletal Geometry G t (moment arms) T1 T2 Eqns 1 of 2 Motion 1 2 1 2 Buchanan et al (2004) Overview al. Four Step P F -St Process to Estimate Muscle Forces Fourt E ti t M l F Step 1: Neural signal to muscle activation Step 2: Muscle activation to muscle force Step 3: Muscle force to muscle moment Step 4: Muscle moment to skeletal motion Emphasis is on the first two steps. Why? The authors obviously...
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This note was uploaded on 02/15/2012 for the course EML 5595 taught by Professor Staff during the Spring '08 term at University of Florida.

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