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          <p style="text-align:center"><font size="4"><a href="https://84454458.streak-link.com/CySwa4U6OosR256a4AS-NDWO/https%3A%2F%2Fwww.wwtns.online" target="_blank"></a></font></p></div></div></div></div></blockquote></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><div class="gmail_quote"><div dir="ltr"><p style="text-align:center"><font size="4"><a href="https://streaklinks.com/A9c7PbbpKY7PxB6PaAJWGD3-/https%3A%2F%2Fwww.wwtns.online" target="_blank">https://www.wwtns.online</a>
              - on twitter: wwtns@TheoreticalWide - on Youtube</font></p></div></div></div></div></blockquote><div style="text-align:center"><br></div><div style="text-align:center"><font size="4">New on the VVTNS YouTube Channel </font></div><div style="text-align:center"><font size="4"><a href="https://www.wwtns.online/past-seminars-2025-2026" target="_blank">https://www.wwtns.online/past-seminars-2025-2026</a></font></div><div style="text-align:center"><b style="background-color:initial;font-family:spinnaker,sans-serif;font-size:20px;letter-spacing:0em"><font color="#000000"><br></font></b></div><div style="text-align:center"><b style="background-color:initial;font-family:spinnaker,sans-serif;font-size:20px;letter-spacing:0em"><font color="#000000">The hippocampus, spatial planning, generative models </font></b><b style="background-color:initial;font-family:spinnaker,sans-serif;font-size:20px;letter-spacing:0em"><font color="#000000">and memory consolidation</font></b></div><div style="text-align:center"><span style="color:rgb(13,13,13);font-family:Roboto,Noto,sans-serif;font-size:large;text-align:start"><br></span></div><div style="text-align:center"><span style="color:rgb(13,13,13);font-family:Roboto,Noto,sans-serif;font-size:large;text-align:start">lecture delivered on February 25, 2026  by</span></div><div style="text-align:center"><div><span style="font-family:Roboto,Noto,sans-serif;text-align:start"><font size="4" color="#000000"><br></font></span></div><div><p style="vertical-align:baseline;background:0px 0px;border:0px;outline:0px;padding:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:18px;line-height:1.6em;font-family:spinnaker,sans-serif;margin:0px"><span style="vertical-align:baseline;background:0px 0px;border:0px;outline:0px;margin:0px;padding:0px;font-family:helvetica-w01-roman,helvetica-w02-roman,helvetica-lt-w10-roman,sans-serif"><span style="vertical-align:baseline;background:0px 0px;border:0px;outline:0px;margin:0px;padding:0px"><span style="vertical-align:baseline;background:0px 0px;border:0px;outline:0px;margin:0px;padding:0px"><font color="#000000">Neil Burgess</font></span></span></span></p><p style="vertical-align:baseline;background:0px 0px;border:0px;outline:0px;padding:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:18px;line-height:1.6em;font-family:spinnaker,sans-serif;margin:0px"><span style="vertical-align:baseline;background:0px 0px;border:0px;outline:0px;margin:0px;padding:0px;font-family:helvetica-w01-roman,helvetica-w02-roman,helvetica-lt-w10-roman,sans-serif"><span style="vertical-align:baseline;background:0px 0px;border:0px;outline:0px;margin:0px;padding:0px"><span style="vertical-align:baseline;background:0px 0px;border:0px;outline:0px;margin:0px;padding:0px"><font color="#000000">University College London</font></span></span></span></p></div><div><br></div><div><font color="#000000"><br></font></div></div><div style="text-align:left"><font color="#000000"><b>Abstract:  </b></font><span style="color:rgb(0,0,0);font-family:spinnaker,sans-serif;font-size:14px;text-align:justify">Much is known about the neural representations of current environmental location and direction within the hippocampal formation, but use of such a “cognitive map” requires the online representation of desired locations and how to get there, and the neural basis for this function has been more elusive. I will discuss how “theta sweeps” of place and grid cell firing encode the current location (at early phases of each theta cycle) while, at later phases, sampling around the forward direction during exploration and indicating the direction to desired locations during goal-directed navigation. I will show how a relatively simple attractor model captures these results, but requires inputs signalling movement-direction and goal-direction.I will discuss why it is useful to consider the hippocampus as a generative model (in which head-direction, rather than movement-direction, is required, to translate egocentric sensory inputs to allocentric latent representations and back again) in explaining its roles in both spatial cognition and memory consolidation. “Replay sequences” are thought to support offline consolidation, and likely resemble theta sweeps more than behavioural experience. I will finish (given time) by considering how human memory consolidation can be seen as extraction of latent variables from replay via self-supervised learning, and how this perspective explains aspects of human memory such as gist-based distortions, imagination and planning.</span></div><div style="text-align:left"><span style="color:rgb(0,0,0);font-size:14px;text-align:justify">.</span></div><div style="text-align:center"><font color="#000000"><br></font></div><div style="text-align:center"><p style="text-align:left;background:transparent;border:0px;outline:0px;padding:0px;vertical-align:baseline;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;line-height:1.6em;font-family:spinnaker,sans-serif;margin:0px"><i style="background-color:transparent;font-family:Arial,Helvetica,sans-serif"><font color="#000000"><span style="font-family:helvetica-w01-light,helvetica-w02-light,sans-serif;text-align:justify"><b>About V<font color="#500050">VTNS</font><font color="#500050"> :</font></b><font color="#500050"> </font>Launched as the World Wide  Theoretical Neuroscience Seminar (WWTN</span><span style="font-family:helvetica-w01-light,helvetica-w02-light,sans-serif;text-align:justify">S) in</span><span style="color:rgb(80,0,80);font-family:helvetica-w01-light,helvetica-w02-light,sans-serif;text-align:justify"> N</span></font><span style="color:rgb(0,0,0);font-family:helvetica-w01-light,helvetica-w02-light,sans-serif;text-align:justify">ovember 2020 and renamed in homage to Carl van Vreeswijk in Memoriam (April 20, 2022), Speakers have the occasion to talk about theoretical aspects of their work which cannot be discussed in a setting where the majority of the audience consists of experimentalists. The seminars, </span></i><i style="background-color:transparent;font-family:Arial,Helvetica,sans-serif;color:rgb(80,0,80)"><span style="color:rgb(0,0,0);font-family:helvetica-w01-light,helvetica-w02-light,sans-serif;text-align:justify">held on Wednesdays at 11 am ET,</span></i><i style="background-color:transparent;font-family:Arial,Helvetica,sans-serif;color:rgb(80,0,80)"><span style="color:rgb(0,0,0);font-family:helvetica-w01-light,helvetica-w02-light,sans-serif;text-align:justify">  are 45-50 min long followed by a discussion. The talks are recorded with authorization of the speaker and are available to everybody on our YouTube channel.</span></i></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><div id="m_7372526750349520834m_-2099457675892930529m_-6046398934232627254m_-5827452734716430257m_7045304362081612403m_4179726376297834025m_5509523003637554824m_-436179444694456296m_-7681628874649059375m_7750187461389672445m_9094229232797745075m_-1462542758380322657m_7936782669738885075m_2132234319318737290m_3082520148829658712m_6732243839182647882m_-287356451416637581m_9199497142594163290m_3123758975499956944m_-4285543598660325014m_3406622003034096663m_-4434917348957094547m_6996923250378584115m_4339855878333796038m_2618317786332564474m_-6182961172059790657m_-6761930163476888199m_-1789248717287360482m_-7753075062499186717mt-signature"><p style="margin:0px;padding:0px;border:0px;outline:0px;vertical-align:baseline;background:transparent;line-height:1.6em"><br></p><p style="margin:0px;padding:0px;border:0px;outline:0px;vertical-align:baseline;background:transparent;font-size:18px;line-height:1.6em;color:rgb(0,0,0);text-align:center"><br></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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