https://pbarkema.github.io/tags/matlab/MATLABHugo Blox Builder (https://hugoblox.com)enMon, 01 Dec 2025 00:00:00 +0000https://pbarkema.github.io/media/icon_hu_43cf117bf1a42c34.pnghttps://pbarkema.github.io/tags/matlab/https://pbarkema.github.io/project/postdiction7tfmri/Mon, 01 Dec 2025 00:00:00 +0000https://pbarkema.github.io/project/postdiction7tfmri/<h3 id="the-science-of-postdiction">The Science of Postdiction</h3> <p>Do brain representations reflect what was presented to our eyes (retinal input) or what we actually perceive? This project investigates <strong>Postdiction</strong>, a phenomenon where information arriving later influences how we perceive an earlier event.</p> <h3 id="research-highlights--technical-achievements">Research Highlights &amp; Technical Achievements</h3> <ul> <li><strong>Advanced Neuroimaging:</strong> Used <strong>7T fMRI</strong> to achieve layer-specific resolution in the primary visual cortex (V1).</li> <li><strong>Layer-Specific Decoding:</strong> Discovered that <strong>deep layers of V1</strong> encode subjective perception (illusory flashes), while <strong>middle layers</strong> continue to track the objective retinal input.</li> <li><strong>Top-Down Modulation:</strong> Identified that postdictive perception is likely facilitated by feedback from <strong>superior temporal cortex</strong> to the early visual cortex.</li> <li><strong>Project Management:</strong> Led a <strong>£400K project</strong> end-to-end, managing a team of three students and coordinating data collection for over 300 participants.</li> <li><strong>High-Impact Communication:</strong> Presented findings at the <strong>Visual Science Society (VSS) 2025</strong>.</li> </ul> <h3 id="scientific-impact">Scientific Impact</h3> <p>Our findings complete a <strong>feedback model</strong> of sensory processing across seeing and hearing, suggesting that early visual cortex is not just a passive relay station but an active participant in constructing hallucinations and perception.</p>