Fig. 5.

Relational topographies of f₁, f₂, f₃, f₄. a Relational topographies of raw f₁ = V_t for the axial (z = −3.5 mm), coronal (y = −3.0 mm) and sagittal planes (x = 12.0 mm). b Topographies of f₂ representing spatial density of sampled points within the roving sphere in the same axial, coronal and sagittal planes. c Topographies of standard deviation (f₃) of points within the roving sphere in the same axial, coronal and sagittal planes. d Relational topographies of f₄, a complex function with the statistical constraints of STD <1.5 and N =5, in the same axial, coronal and sagittal planes.