TABLE 2.Frequencies of synaptic connections between neuron pairs
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Connection Type |
Pairs Recorded |
No. of Connections |
Percent |
No. of Reciprocal Connections Observed |
No. of Reciprocal Connections Predicted |
RS ↔ RS | 89 | 11 | 6 | 1 | 0 |
FS → RS | 190 | 83 | 44 | 34 | 32 |
RS → FS | 172 | 74 | 43 | 34 | 32 |
RS → LTS | 63 | 36 | 57 | 13 | 13 |
LTS → RS |
74 |
26 |
35 |
13 |
13 |
Summary of all cell pairs (intersomatic distance < 50 µm) recorded in this study. All recordings made in the presence of AP5.
In some experiments DL-2-amino-5-phosphopentanoic acid (AP5) and 6,7-dinitroquinoxaline-2,3-dione (DNQX) were present, so the excitatory connection
could not be tested. The expected numbers of reciprocal connections reflect the product of the sampled incidences of connections
in each direction.