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   B) C

3 (| A | . | B | . | C |)
__ > __ > __ > __ > __ > __ >
A = Prev1 Vector
B = Prev2 Vector
C = Curr Vector

Function Output Type : Numeric

Calculated : At Tracing Point

Command Line Usage Function : "-f42, 0, 0, 10.0"

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
*All units are microns

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 :