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PhD Thesis Julian Packheiser

2018-06-28

On Friday, the 28th of June 2018, Julian successfully defended his PhD thesis entitled "The neuronal mechanisms and dynamics of extinction learning and renewal". Julian’s PhD thesis puts two bold hypotheses forward: First, consolidation of extinction is not required for extinction to occur. Julian was quite cautious to also remark that this is true for behavior analyses and must not necessarily apply for all aspects of neurobiology. Second, key events during extinction are not coded by highly specialized neurons but by cells of mixed-selectivity as they encode a large variety of parameters during an extinction learning paradigm. While the neural responses are highly distributed and diverse on the single unit level, the population response can be decoded into discrete neural archetypes. These and many more findings were pretty impressive. Even more impressive was Julian’s ability to then successfully master 90 minutes of savage grilling by Onur Güntürkün, Nikolai Axmacher, Oliver Wolf, and Jonas Rose. The committee was so impressed that they decided to award Julian’s PhD with a summa cum laude. Congratulations, Julian! We all are very proud of you! During the subsequent photo session three people took in parallel pictures from different locations. The result is funny: everybody looks somewhere else.

On Friday, the 28th of June 2018, Julian successfully defended his PhD thesis entitled "The neuronal mechanisms and dynamics of extinction learning and renewal". Julian’s PhD thesis puts two bold hypotheses forward: First, consolidation of extinction is not required for extinction to occur. Julian was quite cautious to also remark that this is true for behavior analyses and must not necessarily apply for all aspects of neurobiology. Second, key events during extinction are not coded by highly specialized neurons but by cells of mixed-selectivity as they encode a large variety of parameters during an extinction learning paradigm. While the neural responses are highly distributed and diverse on the single unit level, the population response can be decoded into discrete neural archetypes. These and many more findings were pretty impressive. Even more impressive was Julian’s ability to then successfully master 90 minutes of savage grilling by Onur Güntürkün, Nikolai Axmacher, Oliver Wolf, and Jonas Rose. The committee was so impressed that they decided to award Julian’s PhD with a summa cum laude. Congratulations, Julian! We all are very proud of you! During the subsequent photo session three people took in parallel pictures from different locations. The result is funny: everybody looks somewhere else.