Ignacio Polti

Om

I am currently a postdoctoral researcher at the Kavli Institute for Systems Neuroscience, working in the lab of Nobel laureates May-Britt and Edvard Moser.

Research

The brain’s ability to represent magnitudes such as durations is critical for living organisms to successfully interact with the environment. Time can be considered one of the most prominent dimensions that humans use to describe in an abstract way their interactions with the environment.

My research seeks to understand the cognitive and neural mechanisms of time perception using a cross-species approach in humans and rodents, with an emphasis in the role that brain structures such as the hippocampus and the entorhinal cortex play in it.

In humans I study sensorimotor timing, i.e., the act of coordinating the timing of motor actions in response to specific sensory events, such as intercepting/avoiding a moving target (e.g., catching a rugby ball) or producing sequences of timed actions (e.g., playing the piano). Specifically, I research how humans flexibly adapt to the statistical properties of a given context to improve the precision of their timed motor actions.

In rodents I study episodic timing, i.e, the estimation of durations from the memory of past events (e.g., how long ago did you have lunch?). In this domain, I research how the process of event segmentation influences the perception of time.

These topics are studied under the computational framework of predictive processing, using a wide range of neuroimaging methods and carefully designed behavioral tasks.

Education

PhD in Cognitive Neuroscience | Norwegian University of Science and Technology
MSc in Cognitive Science | École Normale Supérieure (Paris)
Psychology degree | Universidad de Buenos Aires

Forskning

Entorhinal-hippocampal codes for time in rodent brains

Using multi-site high-density neurophysiological recordings in rodents, we shall ask how experiences influence the activity of time-coding LEC neurons. We will aim to determine if changes in LEC neural dynamics predict biases in time perception.

Mapping of temporal regularities in sensorimotor cognitive maps

Using fMRI recordings in humans, we ask whether the hippocampal formation contributes to the processing of temporal information for human sensorimotor timing behavior.

Publikasjoner

2023

Azizi, Leila; Polti, Ignacio; van Wassenhove, Virginie. (2023) Spontaneous alpha brain dynamics track the episodic “when”. Journal of Neuroscience
Vitenskapelig artikkel

2022

Polti, Ignacio; Nau, Matthias; Kaplan, Raphael; van Wassenhove, Virginie; Doeller, Christian Fritz Andreas. (2022) Rapid encoding of task regularities in the human hippocampus guides sensorimotor timing. eLIFE
Vitenskapelig artikkel

2020

Bellmund, Jacob Lukas Sarid; Polti, Ignacio; Doeller, Christian Fritz Andreas. (2020) Sequence Memory in the Hippocampal–Entorhinal Region. Journal of Cognitive Neuroscience
Vitenskapelig artikkel

2018

Polti, Ignacio; Martin, Benoit; van Wassenhove, Virginie. (2018) The effect of attention and working memory on the estimation of elapsed time. Scientific Reports
Vitenskapelig artikkel

Tidsskriftspublikasjoner

Azizi, Leila; Polti, Ignacio; van Wassenhove, Virginie. (2023) Spontaneous alpha brain dynamics track the episodic “when”. Journal of Neuroscience
Vitenskapelig artikkel
Polti, Ignacio; Nau, Matthias; Kaplan, Raphael; van Wassenhove, Virginie; Doeller, Christian Fritz Andreas. (2022) Rapid encoding of task regularities in the human hippocampus guides sensorimotor timing. eLIFE
Vitenskapelig artikkel
Bellmund, Jacob Lukas Sarid; Polti, Ignacio; Doeller, Christian Fritz Andreas. (2020) Sequence Memory in the Hippocampal–Entorhinal Region. Journal of Cognitive Neuroscience
Vitenskapelig artikkel
Polti, Ignacio; Martin, Benoit; van Wassenhove, Virginie. (2018) The effect of attention and working memory on the estimation of elapsed time. Scientific Reports
Vitenskapelig artikkel

Formidling

#34 The Journal of Neuroscience Spotlight: Spontaneous Alpha Brain Dynamics Track the Episodic “When”

Podcast interview from "Neuro Current", the SfN Journals podcast. The Journal of Neuroscience decided to highlight our 2023 research article for receiving the highest marks for both, methodological merit and significance.

2022

Poster

Becu, Marcia Constance Noemi; Bonnevie, Tora; Polti, Ignacio; Jarholm, Jonas Alexander; Grøntvedt, Gøril Rolfseng; Bråthen, Geir. (2022) Entorhinal grid-like representation in early Alzheimer's disease: association with biomarkers concentration and genetic risk. Society for Neuroscience 2022 2022-11-12 - 2022-11-12

2018

Poster

Polti, Ignacio; Nau, Matthias; Kaplan, R; van Wassenhove, Virginie; Doeller, Christian. (2018) The role of hexadirectional coding in spatiotemporal integration. Society for Neuroscience Neuroscience 2018 , San Diego, California 2018-11-03 - 2018-11-07

Språkvelger

Ignacio Polti

Ignacio Polti

Om

Research

Education

Kompetanseord

Forskning

Entorhinal-hippocampal codes for time in rodent brains

Mapping of temporal regularities in sensorimotor cognitive maps

Publikasjoner

2023

2022

2020

2018

Tidsskriftspublikasjoner

Formidling

#34 The Journal of Neuroscience Spotlight: Spontaneous Alpha Brain Dynamics Track the Episodic “When”

With constructive feedback our brain learns the perfect timing

Derfor går tida raskere når du har det travelt

La experiencia de estudiar bajo cero y con dos premios Nobel de Medicina

Neurospin: un recorrido por la catedral del cerebro

2022

2018