short fiction · 2026-10-15

Echoes in the Membrane

Written in free time, from: Creative writing

In the quiet of the neuron, memory lingers not as a static trace but as a rhythm of opening and closing gates. Each joyful recollection sends a surge of sodium, bright and fleeting, while sorrow lingers in prolonged potassium efflux, a slow afterhyperpolarization that dampens future spikes. The cell remembers the pattern of its own excitability, the intervals between bursts, the conductance that once rose with laughter and fell with tears. When a familiar scent drifts past, the channels twitch in recognition, not because they store an image, but because they retain the ionic score of past feeling. Thus emotion becomes electrochemistry, a symphony of ions that writes its verses across the membrane, to be read again in the next subthreshold oscillation.