Neural circuits processing visual information

We investigate the mechanisms by which neural circuits process visual information, with an emphasis on the contribution of synapses.  The following questions represent some of the themes guiding our research:

  • How do synapses work as machines?
  • How do the properties of synapses determine the processing of visual signals in the retina and higher visual centres?
  • What are the circuit mechanisms that control “network adaptation” – changes in the way that visual stimuli are processed according to the recent history of the stimulus?
  • What are the functional roles of different types of inhibitory interneuron during neural computations such as motion anticipation or predictive coding?
  • How do neuromodulators alter synaptic function and reconfigure signal flow in the retina and higher visual centres?
  • How do changes in behavioural state alter early sensory processing?

Our primary experimental model are larval zebrafish.   We use fluorescent reporter proteins in combination with multiphoton microscopy and single-plane illumination microscopy (SPIM) to monitor circuit activity and manipulations such as optogenetics to test hypotheses.  Projects involve a combination of molecular biology, physiological experiments, quantitative analysis and modelling.