Table 1 Lengths of nerve fibers

From: Tracing nerve fibers with volume electron microscopy to quantitatively analyze brain connectivity

Region

Length of non-synaptic fibers (m/mm3)

Length of excitatory axons (m/mm3)

Length of inhibitory axons (m/mm3)

Length of myelinated axons (m/mm3)

Length of spiny dendrites (m/mm3)

Length of smooth dendrites (m/mm3)

Total length of nerve fibers (m/mm3)

SR

382.06 4.67%

6761.19 82.70%

195.14 2.39%

17.72 0.22%

731.79 8.95%

87.89 1.08%

8175.79 100%

L1

1387.28 14.79%

6371.80 67.94%

578.53 6.17%

42.68 0.46%

961.27 10.25%

37.22 0.40%

9378.79 100%

L3

2376.22 31.49%

4237.03 56.15%

282.96 3.75%

21.16 0.28%

601.56 7.97%

27.30 0.36%

7546.22 100%

  1. Lengths of the different types of neuronal processes in the stratum radiatum (SR), and layers 1 and 3 of the somatosensory cortex (L1 and L3). Data are given as the length of fibers in meters per cubic mm of tissue, and the percentage of the total length of nerve fibers in each region.