Researchers built a network of neurons that can stay "awake" and active for 30 minutes with absolutely zero outside input.
April 16, 2026
Original Paper
Modeling of Self-sustained Neuron Population without External Stimulus
arXiv · 2604.13719
The Takeaway
We often assume the brain is a reactive machine—it gets a signal from the eyes or ears and then it fires. But this paper shows that a network of neurons can keep itself buzzing in a state of irregular, autonomous activity for up to 1,800 seconds after just one tiny initial nudge. It’s like a conversation that keeps going long after the last person left the room. This mimics the "internal chatter" of the human brain that happens even when we're asleep or in a sensory deprivation tank. Understanding how neurons maintain this "phantom" activity could unlock the secrets of how our thoughts and consciousness persist without constant stimulation.
From the abstract
Self-sustained neural activity in the absence of ongoing external input is a fundamental feature of nervous system dynamics, yet the conditions under which it can emerge in biophysically grounded network models remain incompletely understood. We studied whether a recurrent network of Hodgkin-Huxley neurons with spike-timing-dependent plasticity and intrinsic stochasticity can maintain autonomous activity after brief transient stimulation. The simulated network comprised 200 neurons (160 excitato