Physiology and Biophysics

August 5, 2015

Kurt Haas, UBC

When:
November 12, 2015 @ 9:30 am – 10:30 am
2015-11-12T09:30:00-08:00
2015-11-12T10:30:00-08:00
Where:
HSB G-328
Contact:
Andres Barria

Experience-driven brain circuit remodeling 

The spatial arrangement of a neuron’s synapses determines how inputs interact to perform computations, such as through recruitment of nonlinear conductances by spatially clustered activity. However, it remains poorly understood how such functional arrangements arise. We developed a random access microscope able to simultaneously record activity of every excitatory synapse, somatic firing, and dendrite morphology of an individual neuron throughout plasticity-inducing visual training in awake animals. We find that dendrite growth and pruning in the developing retinotectal system of transparent Xenopus tadpoles is regulated by sensory experience in a manner strongly dependent on each neuron’s evoked responses. We identify rules based on local dendritic activity patterns that promote clustering of synaptic inputs with shared tuning and promote processing of the specific stimuli experienced. 

Kurt Haas, Ph.D.

Assistant Professor
Brain Research Centre

Department of Cellular and
Physiological Sciences

University of British Columbia

lab website: http://www.haaslab.com/

Host: Andres Barria