Dendritic spine

prototypical dendritic spine

structure	dimension	source
dendrite length	6 µm	{{#info: Harris Tsao 1992 [1]}}
dendrite diameter	1.0 µm	{{#info: Harris Tsao 1992 [2]}}
spine total length	1.0 µm	{{#info: Harris Tsao 1992 [3]}}
spine neck length	0.7 µm	{{#info: Harris Tsao 1992 [4]}}
spine neck diameter	0.3 µm	{{#info: Harris Tsao 1992 [5]}}
spine head length	0.3 µm	{{#info: Harris Tsao 1992 [6]}}
spine head diameter	0.5 µm	{{#info: Harris Tsao 1992 [7]}}
synaptic surface area	1.5 µm2	{{#info: Harris Tsao 1992 [8]}}
spine total volume	0.1 µm3	{{#info: Harris Tsao 1992 [9]}}
spine count	1/µm dendrite	{{#info: Harris Tsao 1992 [10]}}

Spine volume calculations are based on cylindrical shape: πr2 * L

π(.3/2)2 * 0.7 + π(.5/2)2 * 0.3 = 0.1 µm3