Cell AttributesΒΆ

Each cell in a population has several attributes that characterise its anatomical and physiological properties. These are:

  • ori - orientation, 0..180.0

  • dir - direction, 0..360.0 (this is stored as ‘ori’, but can be

    referred to as ‘dir’ when the relevant values go from 0..360)

  • ori_cv - circular variance of orientation 0..1

  • phase - phase of spatial RF, 0..360.0

  • ocdom - ocular dominance, -1.0 (left) to 1.0 (right)

  • rfx, rfy - position of center of RF on LGN/stimulus grid (xn by yn)

  • cx, cy - cortical location in microns

Some attributes can be rederived after an input is connected to a cell using the following commands in the body of an <input> object:

  • attr_ori_derive_from_pop [pop_name] - to compute the orifrom the ori values of all synaptic inputs from the named population, weighted by the synaptic weights.
  • attr_dir_derive_from_pop [pop_name] - to compute the ori as a direction value (0..360) from the ori values and synaptic interactions (e.g. as DS02 with negative phase shift will add 180 to the input ori values).