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Connectivity Structure

Table 2. lSBC sSBC GBS D-SC
Number of cells 36600 15 6300 15 630 15 16
Converging ANFs, n soma
2-3 1 2 14 15		 soma
2-3 1 2 14 15		 soma/prox. dend15
4-4015
av~23 3 21		 soma/prox. dend15
106
Inhibitory Inputs, n 10 1 10 1 91 3
Excitatory Endings Morphology Endbulb of
Held1 1 15		 Endbulb of
Held1 1 15		 Modified
Endbulb 12 15		 Bouton
Endings 15
Input (ANF) CF L 10 11 H 10 or
H/full range 11		 H-L wide range 6 11
Input (ANF) SR, spikes/s L/M/H equally7 L/M/H equally7 mainly H 3 4 5 7
Ex:183
Exc. Synapse Conductance, nS 222 6 222 6 222 6 4.56
Exc. Synapse decay Time Constant, ms 0.36-0.52 0.36-0.52 0.36-0.52
Exc. Synapse Reversal Potential, mV 02 02 02
Inh. Synapse conductance, nS 7.56 7.56 7.56
Inhib Synapse Time Constant, ms (α function) 116 116 116
“Cell” Type II II3 I-II6 or II-I6
Cell CF skewed to L13 the same range
as ANFs 24		 skewed to H13 broadly tuned15 16
Cell SR, spikes/s distribution ~ to that of ANF7 383 or L31 ??
Response Type PL8 9 11 15 PL8 9 11 15 PL-N2 3 8 15 Onc 8 9 11
Targets iLSO only2 11 cMNTB8 11 14 BC
Deviation of first spike occurrence 100 μsec15
Inhibitory inputs delay from AN, ms 2 2 2
Driven Rate,spikes/s 1003

MNTB and LSO connectivity

Table 3 MNTB - PC LSO - PC
Number of cells 2000-6000 21 75% of the population 20
Excitatory Inputs, n soma 119 distal dendrites 17 20 1022
Inhibitory Inputs, n soma/prox. dend17 18 20 822
Excitatory Endings Morphology Calyx of Held14 17 20
Exc. Synapse Conductance, nS 30–16014
Exc. Synapse decay Time Constant, ms
Exc. Synapse Reversal Potential, mV
Inh. Synapse conductance, nS
Inhib Synapse Time Constant, ms <221
Av. decay (1-exp) 0.7521
Excitation time delay from AN, ms 1.220 2.920
Inhibition time delay from AN, ms 3.120
Cell CF preponderance of H21 skewed to H23 27
Response Type PL/PL-N20,2120 21 S/F-CHOP7 20 25 - 30
Cell SR, spikes/s from <1 to >10021, av~3021 No or Low 21

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ACKNOWLEDGMENTS

This work was funded by A.B. Kogan Research Institute for Neurocybernetics, Southern Federal University, Rostov-on-Don, Russia