When a fly senses an odor, 50 neurons fire in a combination that’s different for every smell.

Neurons fire in the motor cortex of my brain, my hands turn the wheel, the car mounts the pavement and two innocent lives are lost.

Sodium and potassium affect how easily neurons fire.

Neocortical neurons fire spontaneously during slow wave sleep, thus they seem to play a role during this period of sleep.

These occur when cortical neurons fire excessively, hypersynchronously, or both, leading to temporary disruption of normal brain function.