Understanding the brain, one dimension at a time.

ELIEZYER
DE OLIVEIRA

How does the brain make memories last?

I am a neuroscientist studying how transient experiences produce lasting changes in the brain that allow memories to persist. Focusing on synaptic and circuit changes, I aim to understand how the brain self-organizes to form and stabilize new memories.

My work combines longitudinal tracking of synapses, circuits, and behavior, using imaging, molecular approaches, and population-level analysis to understand how fleeting experiences become stable biological traces in the brain. By revealing how memories stabilize across synapses and circuits, this work can identify mechanisms disrupted in psychiatric and neurological disorders, providing new treatment targets for preserving memory.

The key to brain function is within its intrinsic organization

Behavior

Behavior reveals how we learn and adapt in a changing world. Modeling it provides the opportunity to study the strategies behind these processes and study the neural circuits that underlie it.

Circuits and manifold

At the neural circuit level, cells are organized into a dynamical system that performs computations that drive behavior. This is often referred to as the manifold and is highly influenced by and dependent on cell-type and cell-state activity.

Molecular

Molecular states shape the composition and recruitment of neurons into computational processes. Understanding these molecular states provides a window into how neural circuits are remodeled and reshape behavior.

About me

I am a Postdoctoral Researcher and Neuroscientist (Ph.D.) with a background in Biomedical Engineering, dedicated to uncovering the mechanisms that drive brain function. My research investigates how neural circuits process information and adapt during learning, focusing on behavior, circuit-level computations, and neuronal molecular states.

I am fascinated by the brain's intrinsic organization and use sleep as a model to explore it. Sleep offers a unique window into brain activity when it is free from sensory inputs and movement. Key questions in my research include: How does the brain construct neural codes from intrinsic activity? Are new activity patterns integrated into or distinguished from existing intrinsic activity during learning?

Project Highlight

Off-manifold coding in visual cortex revealed by sleep

Using sleep as a model, I explored intrinsic correlations (the manifold) in the primary visual cortex (V1) and uncovered how the brain optimizes its neural activity space. Synaptic connections create correlations that constrain activity to a reduced neural space, the intrinsic manifold. This leaves an 'activity-free' off-manifold space accessed only through sparse activity. My findings reveal that brain-wide signals (e.g., body movements) are encoded within the intrinsic manifold, while natural scenes activate the off-manifold space. This separation ensures efficient use of distinct neural subspaces to reconcile low-dimensional dynamics with high-dimensional representations. Preprint

Explore my work and connect with me to learn how intrinsic brain activity shapes behavior and learning.