/*  muscle_membrane.mdl  */

/* The muscle membrane surface (book Fig. 4.4A) is a polygon mesh 
that is created in 3 pieces ("top", "middle", and "bottom") that 
fit together exactly.  Each piece contains AChR effector sites at 
a different density. */

piece_1 POLYGON_LIST {
  VERTEX_LIST {    /* 4140 vertices */
    [ 1.19131, -1.00079, 0.0548093 ]    /* vertex 0 */
    /* vertices 1 – 4139 omitted */
  }
  ELEMENT_CONNECTIONS {    /* 7579 mesh elements */
    [ 0, 3, 2 ]    /* mesh element 0 */
    /* element connections for mesh elements 1 – 7578 omitted */
  }
  FULLY_CLOSED = NO
  ADD_EFFECTOR {
    STATE = AChR.R0    /* "R0" state from previously defined 
"AChR" reaction mechanism. */
    DENSITY = 7250    /* High density on top regions of junctional 
fold postsynaptic membrane. */
    ELEMENT = ALL_ELEMENTS 
    POLE_ORIENTATION = POSITIVE_FRONT
  }
}

piece_2 POLYGON_LIST {
  VERTEX_LIST {    /* 5140 vertices */
    [ 1.03176, -0.975667, -0.092565 ]    /* vertex 0 */
    /* vertices 1 – 5139 omitted */
  }
  ELEMENT_CONNECTIONS {    /* 8849 mesh elements */
    [ 0, 4, 2 ]    /* mesh element 0 */
    /* element connections for mesh elements 1 – 8848 omitted */
  }
  FULLY_CLOSED = NO
  ADD_EFFECTOR {
    STATE = AChR.R0
    DENSITY = 7250*0.297    /* Lower density in middle regions of 
junctional fold postsynaptic membrane. */
    ELEMENT = ALL_ELEMENTS 
    POLE_ORIENTATION = POSITIVE_FRONT
  }
}

piece_3 POLYGON_LIST {
  VERTEX_LIST {    /* 4957 vertices */
    [ 1.20764, -0.934226, -0.414127 ]    /* vertex 0 */
    /* vertices 1 – 4956 omitted */
  }
  ELEMENT_CONNECTIONS {    /* 8937 mesh elements */
    [ 5, 1, 3 ]    /* mesh element 0 */
    /* element connections for mesh elements 1 – 8936 omitted */
  }
  FULLY_CLOSED = NO
}    /* No AChR effector sites on bottom portion of junctional 
fold postsynaptic membrane. */

/* All 3 templates for the muscle membrane mesh pieces are copied 
into one metaobject named "postsynaptic_membrane", which then is 
instantiated in the main mdl file "rat_nmj.main.mdl". */
postsynaptic_membrane OBJECT {
  top OBJECT piece_1 { }
  middle OBJECT piece_2 { }
  bottom OBJECT piece_3 { }
}