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Table 2 Probabilities of synapses (from Table 1) and of potential 'contacts' between axons and dendrites for each neuron type

From: Axon and dendrite geography predict the specificity of synaptic connections in a functioning spinal cord network

  Dendrites
Axons dlc ain cin din mn
RB ipsi      
   Synapse 0.63 0.13 0.09 + (0.13) +(0.02)
   Contact 0.65 0.29 0.10 0.29 0.04
dlc contra      
   Synapse 0+ (0.04) 0.33 0.43 0.33 0.46
   Contact 0.08 0.89 0.64 0.54 0.82
aIN ipsi      
   Synapse (0.13) 0.25 0.15 0.2 0.33
   Contact 0.28 0.72 0.57 0.60 0.50
cIN contra      
   Synapse 0+ (0.04) 0++ (0.40) 0.26 ++ (0.24) 0++ (0.37)
   Contact 0.08 0.88 0.61 0.52 0.80
dIN ipsi      
   Synapse + (0.04) *++ (0.42) *++ (0.34) *++ (0.29) *++ (0.37)
   Contact 0.08 0.91 0.73 0.64 0.80
mn ipsi      
   Synapse (0.00) (0.41) (0.18) (0.10) (0.45)
   Contact 0.00 0.89 0.40 0.22 0.98
  1. Synapse probabilities in bold are those from recordings based on more random sampling. Where there are no data from recordings, estimates of synaptic contact probabilities (in parentheses) are 46% of the anatomically estimated contact probabilities. For each neuron type, ipsi refers to synapses made on the same side and contra refers to synapses made on the opposite side. +, rare connections inferred from other experiments; ++, common connections but no quantitative data; *, connections frequent but preliminary recordings were used to select pairs of neurons that were connected, so connection probabilities are not meaningful.