Table 2.

Total surface area as a result of different neuronal cellular compartments in the average neocortex

Cellular compartment	Total length (m)	Average diameter (μm)	Surface area (m2)
Dendrite shafts	211 427 054	~1	651
Dendritic spines	342 900 000	~0.25	980
Myelinated axon	20 049 000	~0.76	48
Dendrites total			1 631

Estimates of total length, average diameter, and surface area associated with dendrite shafts/spines, and myelinated axon derived from theoretical model of membranes in the average cerebral cortex. See Supplementary Calculations for further details.