Consciousness emerges from coordinated neural signalling across brain networks rather than from a single neuron or isolated synapse, linking cellular mechanisms to rapid communication in nervous systems.
Consciousness is associated with coordinated activity across interacting brain networks rather than one isolated neuron or single region.
Arousal systems regulate wakefulness while cortical and subcortical networks integrate sensory information, memory and self-related processing. Evidence from sleep, anaesthesia and brain injury links changes in network connectivity to conscious state. Conscious awareness is therefore an emergent interpretation of coordinated neural activity, not a single switch in one neuron.
Separate the components:
During deep anaesthesia, widespread connectivity and coordinated responses fall, while local sensory circuits may still respond to stimulation.
A neural response alone does not prove a conscious experience; integration and reportability require additional evidence.