After providing all the funding for The Brain from Top to Bottom for over 10 years, the CIHR Institute of Neurosciences, Mental Health and Addiction informed us that because of budget cuts, they were going to be forced to stop sponsoring us as of March 31st, 2013.

We have approached a number of organizations, all of which have recognized the value of our work. But we have not managed to find the funding we need. We must therefore ask our readers for donations so that we can continue updating and adding new content to The Brain from Top to Bottom web site and blog.

Please, rest assured that we are doing our utmost to continue our mission of providing the general public with the best possible information about the brain and neuroscience in the original spirit of the Internet: the desire to share information free of charge and with no adverstising.

Whether your support is moral, financial, or both, thank you from the bottom of our hearts!

Bruno Dubuc, Patrick Robert, Denis Paquet, and Al Daigen

Wednesday, 7 March 2018
“Winner effect” Makes Subordinate Mice Dominant

This week I’d like to tell you about an experiment by Hailan Hu and his team at Zhejiang University, in China. These researchers used optogenetic methods and various wavelengths of light to excite or inhibit, on command, a particular population of neurons in the dorsomedial prefrontal cortex (dmPFC) of mice. (These neurons receive their natural inputs from the mediodorsal portion of the thalamus.) When the researchers excited these neurons in previously subordinate mice, they began to win confrontations with previously dominant mice, forcing them to retreat in a tube resembling a narrow tunnel (see photo above) and let them pass first. (more…)

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