Somato-dendritic morphology and dendritic signal transfer properties differentiate between fore- and hindlimb innervating motoneurons in the frog Rana esculenta

Table 1 Metric morphological data measured and their description

Group	Morphological variable	Description
Soma	Roundness	The ratio between the maximum and minimum diameters of the soma.
	Soma surface	The average surface area of the prolate and oblate ellipsoids fitted to the soma.
Stem dendrites	Number of stem dendrites	Number of dendrites connected to the soma.
	Sum of diameters of stem dendrites	The mean stem diameter multiplied by the number of stem dendrites.
Dendritic tree	Number of dendritic branches	A branch is defined as part of the dendritic tree between two branch points, a branch point and an end point or between the soma and the first branch point.
	Maximum order of dendritic branches	The highest number of branch points along dendritic paths from the soma to end points.
	Combined (total) dendritic length	Sum of the length of all dendritic branches.
	Surface	Sum of the surface of all dendritic branches.
	Mean parent length	Mean length of branches connecting two branch points in the dendritic tree of the neuron.
	Mean distance to BRP	Mean distance of branch points from the soma measured along the dendritic branches (path distance).
	Mean distance to ENDP	Mean distance of end points from the soma measured along the dendritic branches (path distance).
	Max distance of ENDP	Path distance of the farthest end point from the soma.

Descriptors were divided into three groups describing the somata, stem dendrites and dendritic arborization.

ISSN: 1471-2202