One oligodendrocyte, its internodes as geometry: move a slider and the sheath, the budget and the readouts follow.
Total myelin sheath volume
46,042 um3 7.46 to 2,714,336 um3 across the sourced ranges. No sourced capacity for this quantity, so the bar places this cell between the smallest and the largest the sourced ranges allow, on a log scale.
Exact geometry: each internode is a hollow cylinder between the axon (g-ratio times fibre diameter) and the fibre surface. This is the quantity the cell must build and maintain; it is the twin's budget.
source 1source 2,
Axon diameter
3.08 um
3.08 to 3.08 um exact
Sheath thickness
0.46 um
0.46 to 0.46 um exact
Sheath volume, one internode
1,535 um3
7.46 to 54,287 um3 propagated
Outer sheath surface, all internodes
113,097 um2
157 to 1,413,717 um2 propagated
Axon length myelinated by this cell
9,000 um
50 to 37,500 um propagated
Number of lamellae (wraps)
26.1
2.75 to 141 propagated
Myelin membrane area, all internodes
2,616,018 um2
410 to 1.60e8 um2 propagated
Conduction velocity
24 m/s
6 to 72 m/s propagated
Conduction change from node length
0 percent
-20 to 20 percent reported
Membrane needed at the node versus the sheath
270 fold less
270 to 270 fold less reported