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Memory Consolidation: Time Machine of the Brain

Visit https://brilliant.org/ArtemKirsanov/ to get started learning STEM for free, and the first 200 people will get 20% off their annual premium subscription. How does sleep help us remember things better? In this video we will explore the wonders of the hippocampus - a brain region involved in memory consolidation and spatial navigation. We will talk about the phenomenon of hippocampal replay and the Sharp Wave Ripples. My name is Artem, I'm a computational neuroscience student and researcher at Moscow State University. Socials: Twitter:   / artemkrsv   Special thanks to Crimson Ghoul for providing English subtitles! OUTLINE: 00:00 Introduction 01:01 Sponsor message 02:23 Cortex and Hippocampus 04:52 Sharp Wave Ripple 06:45 Fast-reverse memory replay 08:55 Fast-forward replay 10:03 Conclusion and Outlook REFERENCES: 1.Ólafsdóttir, H. F., Bush, D. & Barry, C. The Role of Hippocampal Replay in Memory and Planning. Current Biology 28, R37–R50 (2018). 2.Hannah R. Joo & Loren M. Frank. The hippocampal sharp wave-ripple in memory retrieval for immediate use and consolidation. Nature Reviews Neuroscience (2018) doi:10.1038/s41583-018-0077-1. 3.Buzsáki, G. The brain from inside out. (Oxford University Press, 2019). 4.Roux, L., Hu, B., Eichler, R., Stark, E. & Buzsáki, G. Sharp wave ripples during learning stabilize the hippocampal spatial map. Nat Neurosci 20, 845–853 (2017). 5.Girardeau, G., Benchenane, K., Wiener, S. I., Buzsáki, G. & Zugaro, M. B. Selective suppression of hippocampal ripples impairs spatial memory. Nat Neurosci 12, 1222–1223 (2009). 6.Feld, G. B. & Born, J. Sculpting memory during sleep: concurrent consolidation and forgetting. Current Opinion in Neurobiology 44, 20–27 (2017). 7.Ambrose, R. E., Pfeiffer, B. E. & Foster, D. J. Reverse Replay of Hippocampal Place Cells Is Uniquely Modulated by Changing Reward. Neuron 91, 1124–1136 (2016). 8.Marcelo G. Mattar & Nathaniel D. Daw. Prioritized memory access explains planning and hippocampal replay. Nature Neuroscience (2018) doi:10.1038/s41593-018-0232-z. 9.Jens G. Klinzing, Niels Niethard, & Jan Born. Mechanisms of systems memory consolidation during sleep. Nature Neuroscience (2019) doi:10.1038/s41593-019-0467-3. 10.Penelope A. Lewis & Daniel Bendor. How Targeted Memory Reactivation Promotes the Selective Strengthening of Memories in Sleep. Current Biology (2019) doi:10.1016/j.cub.2019.08.019. 11.Wenbo Tang, Justin D. Shin, Loren M. Frank, & Shantanu P. Jadhav. Hippocampal-Prefrontal Reactivation during Learning Is Stronger in Awake Compared with Sleep States. The Journal of Neuroscience (2017) doi:10.1523/jneurosci.2291-17.2017. 12.Buzsáki, G. Hippocampal sharp wave‐ripple: A cognitive biomarker for episodic memory and planning. Hippocampus 25, 1073–1188 (2015). 13.Diba, K. & Buzsáki, G. Forward and reverse hippocampal place-cell sequences during ripples. Nat Neurosci 10, 1241–1242 (2007). 14.Shin, J. D., Tang, W. & Jadhav, S. P. Dynamics of Awake Hippocampal-Prefrontal Replay for Spatial Learning and Memory-Guided Decision Making. Neuron 104, 1110-1125.e7 (2019). 15.Mehta, M. R. Cortico-hippocampal interaction during up-down states and memory consolidation. Nat Neurosci 10, 13–15 (2007). 16.Aussel, A., Buhry, L., Tyvaert, L. & Ranta, R. A detailed anatomical and mathematical model of the hippocampal formation for the generation of sharp-wave ripples and theta-nested gamma oscillations. J Comput Neurosci 45, 207–221 (2018). ------- B roll footage by pexels.com Icons by biorender.com ------- This video was sponsored by Brilliant