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. 2011 Mar 2;31(9):3351–3361. doi: 10.1523/JNEUROSCI.4881-10.2011

Table 2.

Synaptic connectivity between layer 4 FS and SOM interneurons

Not connected Total
FS–FS 13 14 17 44
SOM–FS 3 10 5 12 30
Total 16 29 29 74

The number of recorded pairs is indicated for each category of connection. Note that there are three categories for SOM–FS pairs (SOM→FS, FS→SOM, and reciprocal) but only two categories for FS–FS pairs (one-way and reciprocal).