All to All

Connects every source neuron to every target neuron. This is the default connection strategy in Simbrain, used by both the 1-2 trick (with 100% excitatory) and the 1-3 trick (with configurable excitatory/inhibitory ratio).

Parameters

• Self-connections allowed: Whether connections where the source and target are the same neuron are allowed. Only applicable if the source and target neurons overlap.
• Bi-directional: If true, synapses are added in both directions (source→target and target→source).

Polarity Behavior

This strategy respects source neuron polarity automatically. The excitatory/inhibitory ratio setting controls the distribution of positive and negative weights for non-polar (Both polarity) neurons. Pre-polarized Excitatory and Inhibitory neurons always maintain their polarity.