20 lines (17 with data), 392 Bytes

#ifndef FRACTUREMODEL
#define FRACTUREMODEL 0
#endif

// Definition of segments of the rat model
#include "Segments.any"
    
// Definition of muscles of the rat model
#if FRACTUREMODEL
#include "Muscles_Split.any"
#else
#include "Muscles.any"
#endif

// Definition of joints of the rat model
#if FRACTUREMODEL
#include "Joints_Split.any"
#else
#include "Joints.any"
#endif