OsciPod

Can mice learn to share food just by watching a partner do it? A 2026 study in Nature Neuroscience shows that observer mice develop stable prosocial preferences after watching a demonstrator choose between selfish and sharing options — without any direct training. The hippocampal dorsal CA1 region was found to be essential for acquiring this socially transmitted learning, with distinct neural acti...

This study reveals the neural circuit by which the medial prefrontal cortex drives contingency degradation — the process of unlearning a cue-reward association that is no longer valid. A new computational model, the meta-reward prediction error model, shows that the brain accumulates prediction errors across multiple trials before updating behaviour, and a dedicated subpopulation of mPFC neurons e...

Hippocampal ripples — brief, high-frequency electrical bursts lasting under 200 milliseconds — do more than consolidate memories during sleep; they actively update the medial prefrontal cortex's relational code during live planning. Recording intracranial EEG simultaneously from the hippocampus and cortex of 28 epilepsy patients, the researchers showed that dorsomedial prefrontal activity enco...

A new study in Science reveals that the apical tuft dendrites of layer 5 pyramidal neurons in the mouse motor cortex are specifically required for relearning complex behavioral rules, but not for executing already-learned behaviors or learning simpler rules. By activating a class of inhibitory neurons called NDNF interneurons that selectively target the dendritic tuft, researchers could block glob...

When thousands of neurons fire together, their collective activity traces a low-dimensional surface called a neural manifold — but does that surface reveal how the neurons are wired? This episode explores a theoretical study showing that the manifold alone is deeply ambiguous: radically different circuit structures can produce indistinguishable population dynamics. However, the spatial arrangement...

This episode explores how a star-shaped network of phase oscillators, whose synaptic weights evolve through a plasticity rule based on phase differences, can settle into exactly 2^N distinct stable configurations, where N is the number of leaf nodes. Each leaf independently either synchronizes with the central hub — forming a strong one-directional synapse — or drifts freely in a near-disconnected...

A team at the Chinese Academy of Sciences and Beijing Normal University built a single glass micropipette device that spontaneously fires neuron-like electrical spikes using only ion flow and surface chemistry — no transistors required. The device uses a polyimidazolium polymer coating that alternately binds and releases a ferricyanide ion, switching the channel's surface charge and reversing...

How does the brain switch between the synchronized rhythms of sleep and the scattered activity of waking? Kuroki and Mizuseki introduce the EI-Kuramoto model, which divides neural oscillators into excitatory (attractive) and inhibitory (repulsive) populations with four independently tunable interaction strengths, and shows through simulation and theory that just three collective states emerge: syn...

How does the brain stay stable through aging, learning, and injury? This episode explores a computational model showing that inhibitory synaptic plasticity — a self-adjusting rule that strengthens local braking whenever excitation runs too high — can dynamically balance excitation and inhibition across a 68-region cortical network. With this mechanism in place, the model simultaneously matches mul...

Why do mice—and likely all mammals—consistently make the same perceptual mistakes on certain sounds? Researchers at the University of Mainz used large-scale two-photon calcium imaging in the mouse auditory cortex to map how hundreds of neurons respond to 189 rhythmically varied pulsed sounds. They found that subtle sound features such as click timing, pulse imbalance, and rhythmic grouping are enc...

When we share personal memories with others, do listeners pick up on the richness of those memories — and does it change how they feel about us? A new study published in PNAS tested this across two experiments in Canada and Italy, showing that people reliably detect whether a shared memory is episodic (vivid, contextually specific) or semantic (general, abstract), and consistently prefer to form c...

The brain's visual cortex generates gamma-band oscillations — rhythms between 30 and 80 Hz — but whether these oscillations actually help us perceive objects has been hotly debated. Karimian and colleagues argue that the stimulus-dependence of gamma synchrony, long seen as a fatal flaw, is in fact the mechanism itself: according to the theory of weakly coupled oscillators, neurons encoding a u...

This episode explores how mice trained to discriminate pulsed sounds showed shared, systematic choice biases even when sounds had the same reinforced pulse count. Seiler and colleagues found that auditory cortex population activity represented four major timing-related sound features, and that entanglement between task-relevant and task-irrelevant feature axes predicted part of the animals' pe...

This study is the first in the world to reveal that theta waves in the human hippocampus are "traveling waves" that move in a specific direction. Using electrode data implanted in the brains of epilepsy patients, the research team discovered that these vibrations propagate in a specific order from posterior to anterior. Human traveling waves have a wider frequency range compared to those...