Last week we successfully submitted an ERC starting grant for our ongoing work investigating how cannabinoids influence learning, interoception, and brain-body interaction! The grant proposes a series of four interlocking experiments probing the neurovisceral mechanisms underlying behavioral, subjective, and interoceptive effects of pharmaceutical THC and CBD. This work continues our recent collaboration with Dr. Samia Joca, investigating the influence of CBD on affective bias. We’re excited to continue this work as it will open up fascinating new research questions for our lab, and will also provide us with new pharmacological manipulations and models we can apply in our computational psychiatry research. We’ll keep our fingers crossed for good reviews – watch this space in the next 6 months!
We’re happy to announce that Micah Allen was recently awarded the Early Career Prize by The British Association for Cognitive Neuroscience! The ‘Early Career Prize’ is awarded to young researchers who have contributed their high-standard and pioneering work to the field of cognitive neuroscience. The aim of the prize is to reward and recognize distinguished scholarship and research excellence undertaken over a period by a cognitive neuroscientist who is currently active in research, and who has made a substantial contribution to Cognitive Neuroscience in the UK. Micah received the award in September 2019, and give an early career prize lecture at the annual meeting in Cambridge entitled “Interoceptive Self-Infeerence: An Embodied Approach to Computational Psychiatry”. Here is the lecture abstract:
“Our ability to learn from an ever-changing, volatile world is essential. Convergent evidence suggests that deficits in the ability to update beliefs in the face of such uncertainty may underpin a variety of psychiatric illnesses. In parallel, we know that many such disorders are accompanied by profound somatic and visceral disruptions, and these are in turn underpinned by the very same neural machinery which encodes decision uncertainty. Here, I will present evidence that metacognitive awareness of uncertainty is biased by visceral arousal. On the basis of these findings, we recently proposed a new computational model of “interoceptive self-inference”, in which the brain samples the volatility of visceral rhythms to predict future decision uncertainty. On this basis, we argue that disordered interoceptive beliefs and/or visceral sensation can both act to produce pervasive decision biases such as those which characterize the major mood and neurodevelopmental disorders.”
It brings me great pleasure to officially announce that I have been awarded joint starting fellowships from the Lundbeck Foundation and Aarhus Institute of Advanced Studies (AIAS)! These fellowships will enable me to launch my own research lab, the Embodied Computation Group (ECG), which will be based at both Aarhus University and Cambridge Psychiatry. This is an incredibly exciting development – obviously for my own sanity as an early career researcher, but also more importantly for the budding field of embodied neuroscience and computational psychiatry!
As an Associate Professor at Aarhus University and a visiting Senior Research Fellow at Cambridge Psychiatry, I will develop the ECG into a multi-disciplinary research group investigating the computational mechanisms of brain-body interaction, and their disruption in a variety of health-harming and psychiatric disorders. The ECG will initially focus on the Visceral Mind Project – an unprecedented chance to map the neural mechanisms through which interoception and arousal shape our decision-making, awareness, and metacognition.
The ECG will be built around The Visceral Mind Project, which aims ultimately to provide a mechanistic basis for understanding brain-body disruption through the lens of computational psychiatry (henceforth, ‘embodied computational psychiatry’). The project will use a variety of techniques developed throughout my postdoc, with an emphasis on computational modelling, machine learning, and causal manipulation of visceral signals to identify how the body shapes decision-making and awareness. This project will be *fully* open; as we progress, we’ll be regularly sharing updates through our lab notebook, and all data, code, and experimental materials will be made available to the public. Our goal is not only to understand brain-body interaction in predictive processing, but to build the first ever open neuroimaging database in this newly emerging research domain. In this way the ECG will act as a catalyst for mechanism-based research in interoception and the computational psychiatry of disordered brain-body interaction.
In Denmark, the ECG will be based at the Danish Neuroscience Centre at Aarhus University Hospital, the Centre for Functionally Integrative Neuroscience, and the Aarhus Institute for Advanced Studies. For this arm of the project, we’ll scan 500 Danes performing a metacognitive learning task, concurrently with quantitative MRI and functional brain imaging. This will enable us to establish how visceral signals from the heart, lungs, and stomach shape the precision-weighted balance of priors and prediction errors in both perceptual and metacognitive beliefs. Further, by applying canonical covariate and other machine learning techniques to brain connectivity and microstructure, we’ll identify sensitive cortical fingerprints indexing individual differences in visceral-weighting. This arm of the project will bring together the latest in fMRI, MEG, and statistical modelling of brain data to answer two key questions: 1) how do visceral signals shape decision computations, and 2) can we use individual differences in the sensitivity to visceral signals as an index of sub-clinical psychiatric symptoms.
At Cambridge Psychiatry and Addenbrookes Hospital, together with Professor Paul Fletcher and the MRC-Wellcome Translational Research Facility, the ECG will use these tasks and models to probe disordered brain-body interaction in a variety of health-harming and psychiatric disorders. Foremost among these are our ongoing investigations of healthy participants undergoing total prophylactic gastrectomy – the surgical removal of the stomach and vagus nerve. Our PTG patients have a mutation of a specific gene which renders them extremely likely to develop profuse gastric cancer, a highly fatal disease. Because of this, when they undergo the procedure they are on average 25 years old and otherwise completely healthy, unlike many other vagotomy and bariatric surgery populations. As such, these patients present an unprecedented opportunity to understand what happens to interoception, decision-making, and visceral weighting when the enteric nervous system and brain-body axis is fundamentally disrupted. More importantly, this project will directly inform the surgeons, patients, and family members going through this difficult process, as currently almost nothing is known about the cognitive or affective impacts of this surgery. This project will thus combine ultra-high field 7T imaging and computational modelling to better understand how profound visceral disruption influences the canonical micro-circuitry associated with metacognitive learning and interoception. More generally, the ECG will use a similar approach to investigate the role of aberrant visceral weighting in hunger, obesity, and other psychiatric disorders such as anxiety and psychosis.
As a third parallel research arm, across both our basic and clinical research sites at Aarhus and Cambridge, respectively, we’ll be developing novel pharmacological, psychophysiological, and electrophysiological techniques to directly manipulate interoceptive predictions and prediction errors. This is a critical long-term goal of our research, as we seek to not only map brain-body interactions, but also to understand how their causal manipulation might one day provide a window into the treatment of mental illness. This research will combine innovative techniques such as vagal nerve stimulation and gastric learning to probe how causal fluctuations in visceral predictability and volatility shape perceptual decisions and metacognition.
In sum, the Visceral Mind Project represents a stunning opportunity to propel our understanding of how our bodies shape our minds. The project is supported by a stellar core network of international collaborators at UCL, Cambridge, and ETH Zurich. Our trainees will enjoy the opportunity to visit and work with these world class centres and investigators, as we work towards building a bridge between the stellar Danish clinical neuroscience community and our collaborators who are experts in computational modelling, psychiatry, and neuroimaging. As I said during my Lundbeck interview, my goal is to build tools that will help Danish clinicians ask better, more mechanistic questions about how symptoms of mental illness arise and that is exactly what we will do!
If any of the above sounds exciting to you, please get in touch! The ECG will be hiring a variety of positions at Aarhus University and Cambridge Psychiatry, including graduate RAs, PhD students, and post-docs! We launch February 2019 – so send us an email as soon as possible! You can read more about our recruitment here and here. We’re looking for ambitious, talented young trainees who want to get in on the ground floor of embodied computational neuroscience and psychiatry. Further, if you would like to collaborate with the ECG, please watch this space. As the project develops we’ll be creating a comprehensive Github repository for all of our code, models, and tasks. This will not only ensure we’re following a fully transparent research ethos, but also facilitate collaboration and communication with our colleagues around the world. We’re excited to build a fully open approach to understanding the embodied mind and its disruption in mental illness.
I’d be remiss if I didn’t take some time here to thank all the amazing friends, family, and colleagues who made this possible. As many of you know, the past two years have been a difficult time for me. In general, the transition from postdoc to ECR is never an easy one. Grant writing and interviewing is a gruelling process and I could not have made it to this point without the unfailing support of my social network. First and foremost, I must thank my amazing wife and ever-present collaborator, Francesca Fardo. Francesca dedicated countless hours to help me formulate the ideas that form the core of the Visceral Mind Project, to endlessly rehearse my interview pitch and preparation, and most importantly, to keeping me sane through all the trials and tribulations. She’s amazing, and I look forward to helping her build her own research group whom will undoubtably become the ECG’s closest collaborators. I must also thank my Grandmother Sharon Allen; my guardian angel who rescued me from hell and made me everything that I am today. Thanks Dad for shaping me into a hardworking and independent person. Thanks to my cousins Marissa and Corey; I’m so proud of you and the great things you’ve already accomplished the things you have yet to do – thanks for being the best siblings I could ever ask for. Thanks to all of our Italian family in Marostica – especially my mother in law Mirella for keeping me fed and warm over so many family vacations. Thanks to our Danish friends for teaching us the real meaning of hygge and making Denmark a warmer place for us.
Thanks to Shaun Gallagher and Andreas Roepstorff, my unfailing mentors who recognized my potential when no one else would and gave me every opportunity to become the scientist I am today. You discovered and nurtured me when it mattered most. Warm thanks to Chris and Uta Frith, for your mentorship and friendship. Thanks to Leif Ostergaard, my mentor for this project – thanks for all your help and for so warmly welcoming me back to CFIN. Thanks to Simon Jeppe Berg who worked tirelessly to help me prepare these grants – even working late in the evening when we were on vacation in California! And thanks to Jorgen Frokiaer for your support and guidance in establishing my group at the department of clinical medicine! Thanks to everyone at Interacting Minds and CFIN – I know we’re going to do some awesome research together!
In the UK – thanks to Tobias Hauser; we’ve come a long way buddy and I couldn’t have done this without your friendship and collaboration. Thanks to Geraint Rees and Karl Friston, whose mentorship and supervision enabled me to branch out and take the risks I needed to take to reach full independence. Thanks to everyone at the FIL and ICN who made me such a better scientist and person, and who made my years in London awesome – you know who you are. Thanks to Paul Fletcher for sharing and amplifying my vision for an embodied approach to computational psychiatry. Thanks to Ray Dolan and Klaas Enno Stephan for your support and guidance of this project! And thanks to all my friends, colleagues, and collaborators who have helped me reach this point!
Thank all of you in the neuroscience hivemind who have encouraged, challenged, and supported my development as a scientist. This win is yours too.
Thanks Mom – I wish you could see this.
Micah Allen – Associate Professor, AIAS & Lundbeck Fellow, and Visiting Senior Research Fellow at Cambridge Psychiatry.