To become larger in quantity or intensity. In the context of neural firing, it refers to an elevation in the frequency and/or strength of electrical impulses traveling through neurons.
Related terms
Facilitation: The process by which a neuron becomes more likely to fire due to repeated stimulation.
Excitatory neurotransmitter: A chemical messenger that increases the likelihood of a neuron firing an action potential.
The shift in electrical charge across a neuron's membrane towards a positive value, making it more likely for the neuron to generate an action potential.