Explain how synapses allow neurons to act as integrators; include the concepts of facilitation (i. e., axo-axonic synapse), and temporal and spatial summation.

A neuron can act as an integrator by processing the synaptic inputs that it receives and converts them into an output signal.

1. Facilitation:

2. Temporal Summation: Two stimulations that are spaced closely together and this creates a greater depolarization than just the one stimulation alone.

3. Spatial Summation: Two stimulations occur at the same time, but they occur at different locations (If spatial summation and temporal summation occur at the same time then you would get an action potential).

4. Convergence: This would occur when the neuron takes multiple synaptic inputs and converts them into one output.