Table 2.

Mean SAS perimeter (nm ± SEM), number of synapses analyzed (n), and the location (µ), and scale (σ) of the log-normal distributions of SAS perimeters in the six cortical layers

ASSS
Mean SAS perimeter ± SEM (nm)nμσMean SAS perimeter ± SEM (nm)nμσ
Layer I1,538.03 ± 42.135947.160.602,405.01 ± 142.87777.650.55
Layer II1,365.80 ± 29.469927.060.552,141.62 ± 130.11647.550.52
Layer III1,638.51 ± 19.6422127.270.592,838.22 ± 118.191857.810.54
Layer IV1,221.79 ± 18.7012006.990.471,704.83 ± 77.281727.290.54
Layer V1,602.44 ± 38.506847.220.562,736.41 ± 186.46627.770.50
Layer VI1,191.59 ± 25.835776.970.451,697.00 ± 112.65727.290.55
Layers I–VI1,460.71 ± 11.2962597.140.542,266.44 ± 54.616327.560.59
  • Unweighted means for Layers I–VI are also shown.