Figure 7
Example of the fitting procedure. A-D show the approximated polynomials F
y'
(r) (blue lines) for r = 4; 5; 9 and 14, respectively. Neither F
y'
(r = 4) nor F
y'
(r = 14) (panels A and D) had a corresponding X
y'
(r) and thus were not taken into consideration. Both F
y'
(r = 8) and F
y'
(r = 9) (panels B and C) had a corresponding X
y'
(r); thus the corresponding 
were compared. Since 
X
y'
(r = 8) (red arrow-head in B) was selected as the boundary of the cell soma for the investigated y'.