Helix
The function computes the helicity of the branches of the neuronal tree. The branch should be at least 3 compartments long to compute the helicity.
Formula : ( A x B) x C
3 (| A | . | B | . | C |)
A = Prev1 Vector
B = Prev2 Vector
C = Curr Vector
Function Output Type : Numeric
Calculated : At Tracing Point
Output:
Metric | Total_Sum | #Compartments (considered) |
#Compartments (discarded) |
Minimum | Average | Maximum | S.D. |
Helix | -2.95175 | 1084 | (18) | -0.2123 | -0.0027 | 0.23637 | 0.0386037 |
Output Interpretation :
Total_Sum of the Helix of each compartment (3 at a time or four consecutive points). Total_Sum = -2.95175 gives Total_Sum, Minimum = -0.2123 gives minimum, Maximum = 0.23637 gives maximum for given input neuron.
References :