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Brain Space Time Podcast
Akseli Ilmanen
10 episodes
6 days ago
Neuroscience is full of open questions. The most fundamental come down to space and time. What can place cells, grid cells and cognitive maps tell us about the evolutionary history from spatial navigation to abstract cognition? Do temporal dynamics between neural oscillations of different frequencies explain how information is structured in the brain? And are there species differences in how time is perceived? To find answers, or at least better questions, I am interviewing researchers in neuroscience, philosophy and physics. Twitter: https://twitter.com/akseli_ilmanen
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Life Sciences
Science
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All content for Brain Space Time Podcast is the property of Akseli Ilmanen and is served directly from their servers with no modification, redirects, or rehosting. The podcast is not affiliated with or endorsed by Podjoint in any way.
Neuroscience is full of open questions. The most fundamental come down to space and time. What can place cells, grid cells and cognitive maps tell us about the evolutionary history from spatial navigation to abstract cognition? Do temporal dynamics between neural oscillations of different frequencies explain how information is structured in the brain? And are there species differences in how time is perceived? To find answers, or at least better questions, I am interviewing researchers in neuroscience, philosophy and physics. Twitter: https://twitter.com/akseli_ilmanen
Show more...
Life Sciences
Science
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#9 Hugo Merchant: Neuronal population clocks
Brain Space Time Podcast
44 minutes 19 seconds
6 months ago
#9 Hugo Merchant: Neuronal population clocks

I just visited the ESI SyNC 2024 conference on the topic of "Time in the brain". There, I interviewed Hugo Merchant, an electrophysiologist at UNAM in Juriquilla, Mexico. Hugo works with macaques, who can rhythmically tap their fingers synchronized to a visual or auditory beat. By studying macaque neural activity in dimensionality-reduced spaces, he wants to understand how the brain encodes different time intervals. For an overview of our conversation, see the timestamps below.


Timestamps:

(00:00:00) - Intro

(00:02:57) - Monkeys rhythmic finger tapping

(00:08:27) - Timing network in pre-motor cortex and basal ganglia

(00:12:43) - Circular neural trajectories

(00:16:08) - Mapping latent space to single-cell physiology

(00:20:15) - Experimentally slowing the clock

(00:23:19) - Spatial organization of circuits

(00:27:59) - Error correction & single-trial analyses

(00:38:57) - Bayesian & SNN models



  • Hugo's Website
  • Hugo's publications & talks:
    • Betancourt et al., 2023 - Amodal population clock in the primate medial premotor system for rhythmic tapping paper
    • Pérez et al., 2023 - Rhythmic tapping to a moving beat: motion kinematics overrules motion naturalness - preprint (Bayesian model)
    • ESI SyNC 2024 Talk (should be uploaded within a month here)
  • Other papers/books mentioned:
    • Shine, 2021 - The thalamus integrates the macrosystems of the brain to facilitate complex, adaptive brain network dynamics paper
    • Zemlianova et al., 2024 - A Recurrent Neural Network for Rhythmic Timing preprint (SNN model)

For Apple Podcast users, find books/papers links at: https://akseliilmanen.wixsite.com/home/post/pod09

  • My Twitter @akseli_ilmanen
  • Email: akseli.ilmanen[at]gmail.com
  • Brain Space Time Podcast, my blog, other stuff
  • Music: Space News, License: Z62T4V3QWL
Brain Space Time Podcast
Neuroscience is full of open questions. The most fundamental come down to space and time. What can place cells, grid cells and cognitive maps tell us about the evolutionary history from spatial navigation to abstract cognition? Do temporal dynamics between neural oscillations of different frequencies explain how information is structured in the brain? And are there species differences in how time is perceived? To find answers, or at least better questions, I am interviewing researchers in neuroscience, philosophy and physics. Twitter: https://twitter.com/akseli_ilmanen