← The Observable Unknown
The Observable Unknown
Interlude XI - The Neurochemical Chorus: Drive, Desire, and the Irrational Animal
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Welcome back, friends, to the observable unknown. Tonight we travel inward, past the hormonal oceans of the body, into the spark lit neurons of the brain. Here in this electrical sea, every thought, every memory, every mood is a chemical event. Tiny molecules passing messages from cell to cell, carrying the music of the mind. The question before us if consciousness is built from chemistry, then what is left of the self? In 1921, the Austrian physiologist Otto Lervi dreamed of an experiment. He awoke at night, scribbled notes, fell asleep again, then rose to perform it. Before the idea vanished, he stimulated a frog's vagus nerve, collecting fluid from the heart. He had slowed. When he applied that fluid to another frog's heart, that heart slowed too. A chemical messenger had crossed the gap. He called it wegglestorff, later known as acetylcholine. A dream had revealed that neurons speak in chemicals. The observable unknown had whispered through sleep. Decades later, Michael Haselmo, a neuroscientist at Boston University, discovered that acetylcholine does more than transmit signals. It sculpts memory itself. When acetylcholine rises in the hippocampus, it suppresses old patterns and amplifies new ones, telling the brain, learn now, forget the past for just a moment. When it falls, the reverse happens. The brain replays, integrates and consolidates. Calls this the switching mechanism of memory. One chemical tuning the balance between present attention and stored experience. The observable unknown. Here is how consciousness decides what to remember and what to let go of. All of this depends on energy, the quiet alchemy within every cell. Hans Krebs in 1937 uncovered the citric acid cycle, the metabolic wheel that turns sugar and oxygen into life's currency, ATP. Each neuron is a furnace of fire atoms. Every emotion you have ever felt was paid for by the burning of carbon and hydrogen. To think is to oxidize. The self is an ember of biochemistry glowing in the dark. In 2019, Molly Crockett at Yale reframed serotonin not merely as a chemical of happiness, but of moral restraint. It tempers impulsive aggression, calibrating social harmony. Earlier, Robert Sapolsky observed in baboon societies that serotonin fluctuates with social standing, rising instability, collapsing under subordination. Yet new findings by T. Froettel and E. Reuter suggest that serotonin may be less about dominance and more about perceived predictability, a neurochemical craving for a coherent social world. The observable unknown is that serotonin doesn't simply measure rank, it measures meaning. Moving over to oxytocin and its lesser known sibling, vasopressin, who may govern a darker edge of bonding, we look at Research by Larry Young and Zoe Donaldson on prairie voles revealed that vasopressin drives territorial devotion and even jealousy. Love as vigilance in humans elevated vasopressin correlates not only with pair bonding but also with suspicion, possessiveness and the policing of emotional boundaries. Thus, the observable unknown. Here, what we call trust may in neurochemical truth be a fragile truce between affection and fear. If dopamine rewards and serotonin stabilizes, norepinephrine mobilizes. Stephen porges and Bruce McEwen found that chronic surges of this arousal chemical reshape not only stress response but social economy cultures bathed in alarm, investors more in control and far less in curiosity. It is norepinephrine that sharpens memory of threat, narrowing the field of perception so that vigilance feels like virtue. The observable unknown is that civilization itself may be running on a low grade catecholamine high an adrenal narrative mistaken for normalcy. Robin Carhart Harris and Roland Griffiths mapped how psychedelics loosen the brain's predictive hierarchy. Under psilocybin or lysergic acid diethylamide, connectivity blooms between regions that never speak. The default mode network, the seat of ego quiets for a moment. The self dissolves into pattern. Perception rewrites itself. Here, the observable unknown is not metaphor. It is experience. Gregory Bateson reminds us that mind is not confined to just the brain. It is a pattern of relationships between neurons, between people, between organism and environment. The neuron and the forest obey the same logic, feedback, communication, adaptation. Consciousness is not an object but a flow, a dance of chemicals and connections, experience extending into the world. So then, what is mind? Perhaps it is the meeting place of molecules and mystery, the observable unknown itself. Every memory we hold, every emotion we feel, every thought we speak is a pattern of chemistry translating into meaning. We are not machines. We are metabolisms of wonder. Before we close, a small favor if this journey moved you, please rate and review the Observable Unknown wherever you listen, Apple, Podcasts, Spotify, or any platform. Your words help others find their way here. And if you'd like to continue the conversation, Please join our WhatsApp channel, the observable unknown or email me at theobservableunknownmail.com you can also text me directly at 336-675-5836. When you do reach out, please tell me, how did you first find out about the show? What's your favorite episode so far? What's one thing we could do better for future listeners, and what's one thing that you personally are struggling with right now? Because awareness, like neurotransmission, is a dialogue. It lives between us. Thank you for listening, for thinking, for feeling, and for walking with me into the observable unknown.