Research
I investigate how neural circuits reorganize to circumvent neural damage & maintain function.
Taking a computational approach, I develop generative models of perceptual and executive functions that closely mirror the neural circuitry underlying these functions. These models, guided by empirical observations, are lesioned in-silico to gain a mechanistic understanding of the functional outcomes of specific neural damage. This enables quantitative prediction of neural circuit responses to lesions, with the potential to identify candidate sites for targeted therapeutic intervention. I use behavioral and non-invasive neuroimaging (e.g., fMRI) data from human subjects to validate model predictions.
My long-term research objective is to establish general principles of neural circuit reorganization and functional resilience.
Briefly, my work:
develops generative models to explain cognitive function and dysfunction in:
Motor Coordination Yuan*, Sajid*, et al, Nature Machine Intelligence, 2023; Gumbsch, Sajid, et al, ICLR Spotlight, 2024
Speech Processing Friston, Sajid, et al, Hearing Research, 2020; Sajid, Parr, et al, Cerebral Cortex, 2020
Visual Processing Fountas, Sajid, et al, NeurIPs, 2020; Parr, Sajid, et al, Frts. in Neurorobotics, 2021; Novicky, ..., Sajid, Cerebral Cortex, 2024
uses these generative models to pinpoint how interactions between lesions shape functional outcomes Sajid, Holmes, et al, Scientific Reports, 2021, Sajid, Parr, et al, Brain Communications, 2021
grounds computational predictions in empirical data Roohani, Sajid, et al, NeurIPs ML4H, 2018; Sajid, Gajardo-Vidal, et al, Biological Communications, 2023
Gumbsch, C., Sajid, N., Martius, G. et al. (2024) Learning Hierarchical World Models with Adaptive Temporal Abstractions from Discrete Latent Dynamics. ICRL Spotlight.
Featured Talks
Maths in the Brain Workshop (2023)
Information-Theoretic Principles in Cognitive Systems (InfoCog) workshop at NeurIPs (2022)
Active Inference Symposium on Robotics (2022)
Workshops
Co-organiser: NeuroAI at NeurIPS2024
Co-organiser: Temporal representations in reinforcement learning (TRiRL) workshop at RLDM2022
Co-organiser: International workshop on Active Inference (IWAI) 2022 at ECML/PKDD2022; IWAI 2023; IWAI 2024
Co-organiser: WiML UnWorkshop 2022 at ICML2022
Co-organiser: Postgraduate Research Conference 2022 at UCL IoN
Public Engagement
UCL Pint of Science on modelling human-like behaviour (2024)
Minds Matter Podcast on modelling and active inference (2022)
Data Study Group lead at Alan Turing Institute (2019)
Data Science Award Judge for TeenTechUK (2018)
Data Student Participant at Alan Turing Institute (2018)
STEM Mentor for TeenTechUK (2017-2018)