Homec4science
Diffusion MMS_shoulder (master) Browse

msm_ul/ShoulderModel/TOOLBOX_Subject_Specific/SUBJECT_TOOL_Update_Weight.m
361f5b9174f4master

Last Change
Raw File

SUBJECT_TOOL_Update_Weight.m
View Options

function [DYDATA, MWDATA] = SUBJECT_TOOL_Update_Weight(SGUIHandle, DYDATAin, MWDATAin)
%{
Function for updating the inertia properties of the generic model based on
the subject weight and height
--------------------------------------------------------------------------
Syntax :
SUBJECT_TOOL_Update_PCSA(SGUIHandle, MWDATA)
--------------------------------------------------------------------------
File Description :
The scaling factors here are mainly choosen from: "R. Dumas et al. / Journal
of Biomechanics 40 (2007) 543?553".
For those properties such as scpula mass which there was not the associated
information in that paper I simply defined the scaling factor such that we
can have the same value for at least the generic model. This can be
improved later on easily in case we had the associated scaling factors for
these bones. Clavicle, ulna, and radius have the same story. Clavicle and
scapula keep their generic inertia values
--------------------------------------------------------------------------
%}
DYDATA = DYDATAin; % initialize the inputs
MWDATA = MWDATAin;
Subject_Gender = get(SGUIHandle.Gender_Selection.Gender,'Value'); % import the subject's gender?from the GUI
Subject_Weight = str2double(get(SGUIHandle.Weight_Selection.Weight,'String')); % import the subject's weight [Kg]?from the GUI
Subject_Height = str2double(get(SGUIHandle.Height_Selection.Height,'String')); % import the subject's height [m]?from the GUI
DYDATA.Height_Scaling_Factor = [Subject_Height/1.86 0 0; 0 Subject_Height/1.86 0; 0 0 Subject_Height/1.86]; % define the scaling factor to scale the bony landmarks
%DYDATA.Height_Scaling_Factor = [1 0 0; 0 1 0; 0 0 Subject_Height/1.86]; % define the scaling factor to scale the bony landmarks
BMI = Subject_Weight/(Subject_Height^2); % BMI of the understudy subject
R_m_g = 1-(-0.09 + 0.0149*(85.5/(1.86^2)) - 0.00009*((85.5/(1.86^2))^2)); % body muscle percentage of the generic model
if Subject_Gender == 2 % male subject
% for scaling the PCSA based on the body weight
R_f = -0.09 + 0.0149*BMI - 0.00009*(BMI^2);
R_m = 1 - R_f;
PCSA_scaling_factor = R_m/R_m_g;
% save this for the EMG assisted load-sharing
DYDATA.PCSA_scaling_factor = PCSA_scaling_factor;
DYDATA.Inertia(1,1) = 0.18e-2*Subject_Weight; % Mc
DYDATA.Inertia(1,2) = 0.82e-2*Subject_Weight; % Ms
DYDATA.Inertia(1,3) = 2.4e-2*Subject_Weight; % Mh
DYDATA.Inertia(1,4) = 0.62*1.7e-2*Subject_Weight; % Mu: This one is a bit messy, because the forearm is mentioned in the BSIP studies and I deceided to consider 62% of the forearm mass as the ulna
DYDATA.Inertia(1,5) = 0.38*1.7e-2*Subject_Weight; % Mr: The same as above.
% DYDATA.Inertia(2,1) = % Ict: Clavicle and scapula keep their generic inertia values
% DYDATA.Inertia(2,2) = % Icl
% DYDATA.Inertia(3,1) = % Ist
% DYDATA.Inertia(3,2) = % Isl
DYDATA.Segments_Lenghts.Humerus = (27.1/177)*Subject_Height; % scale the humerus lenght according to the body height
DYDATA.Segments_Lenghts.Ulna = (28.3/177)*Subject_Height; % scale the ulna lenght according to the body height
DYDATA.Segments_Lenghts.Radius = (28.3/177)*Subject_Height; % scale the radius lenght according to the body height
DYDATA.Inertia(4,1) = (0.315*DYDATA.Segments_Lenghts.Humerus)^2*2.4e-2*Subject_Weight; % Iht
DYDATA.Inertia(4,2) = (0.14*DYDATA.Segments_Lenghts.Humerus)^2*2.4e-2*Subject_Weight; % Ihl
DYDATA.Inertia(5,1) = (0.275*DYDATA.Segments_Lenghts.Ulna)^2*0.62*1.7e-2*Subject_Weight; % Iut
DYDATA.Inertia(5,2) = (0.11*DYDATA.Segments_Lenghts.Ulna)^2*0.62*1.7e-2*Subject_Weight; % Iul
DYDATA.Inertia(6,1) = (0.275*DYDATA.Segments_Lenghts.Radius)^2*0.38*1.7e-2*Subject_Weight; % Irt
DYDATA.Inertia(6,2) = (0.11*DYDATA.Segments_Lenghts.Radius)^2*0.38*1.7e-2*Subject_Weight; % Irl
elseif Subject_Gender == 3 % female subject
% for scaling the PCSA using the body weight
R_f = -0.08 + 0.0203*BMI - 0.000156*(BMI^2);
R_m = 1 - R_f;
PCSA_scaling_factor = R_m/R_m_g;
% save this for the EMG assisted load-sharing
DYDATA.PCSA_scaling_factor = PCSA_scaling_factor;
DYDATA.Inertia(1,1) = 0.18e-2*Subject_Weight; % Mc
DYDATA.Inertia(1,2) = 0.82e-2*Subject_Weight; % Ms
DYDATA.Inertia(1,3) = 2.2e-2*Subject_Weight; % Mh
DYDATA.Inertia(1,4) = 0.62*1.3e-2*Subject_Weight; % Mu
DYDATA.Inertia(1,5) = 0.38*1.3e-2*Subject_Weight; % Mr
% DYDATA.Inertia(2,1) = % Ict
% DYDATA.Inertia(2,2) = % Icl
% DYDATA.Inertia(3,1) = % Ist
% DYDATA.Inertia(3,2) = % Isl
DYDATA.Segments_Lenghts.Humerus = (24.3/161)*Subject_Height; % scale the humerus lenght according to the body height
DYDATA.Segments_Lenghts.Ulna = (24.7/161)*Subject_Height; % scale the ulna lenght according to the body height
DYDATA.Segments_Lenghts.Radius = (24.7/161)*Subject_Height; % scale the radius lenght according to the body height
DYDATA.Inertia(4,1) = (0.33*DYDATA.Segments_Lenghts.Humerus)^2*2.2e-2*Subject_Weight; % Iht
DYDATA.Inertia(4,2) = (0.17*DYDATA.Segments_Lenghts.Humerus)^2*2.2e-2*Subject_Weight; % Ihl
DYDATA.Inertia(5,1) = (0.255*DYDATA.Segments_Lenghts.Ulna)^2*0.62*1.3e-2*Subject_Weight; % Iut
DYDATA.Inertia(5,2) = (0.14*DYDATA.Segments_Lenghts.Ulna)^2*0.62*1.3e-2*Subject_Weight; % Iul
DYDATA.Inertia(6,1) = (0.255*DYDATA.Segments_Lenghts.Radius)^2*0.38*1.3e-2*Subject_Weight; % Irt
DYDATA.Inertia(6,2) = (0.14*DYDATA.Segments_Lenghts.Radius)^2*0.38*1.3e-2*Subject_Weight; % Irl
else
disp('Please specify the subject''s gender.');
end
% updating the PCSA
for muscle_id = 1: 42
MWDATA{muscle_id, 1}.MSCInfo.PCSA = PCSA_scaling_factor*MWDATA{muscle_id, 1}.MSCInfo.PCSA;
MWDATA{muscle_id,1}.MSCInfo.Fmax = PCSA_scaling_factor*MWDATA{muscle_id,1}.MSCInfo.Fmax;
end
return;
c4science · Help