<div dir="ltr"><div><div><div><i>Department chairs and research institute representatives, please circulate this to your faculty and students.</i><br><br>Next week (Jan 27 1-2:30pm, <b><u>LHS 1621: NEW ROOM</u></b>) the Kinesiology Neuroscience Seminar Series welcomes you to attend a guest lecture presented by <a href="https://sites.google.com/site/andpru/" target="_blank"><span>Andrew</span></a><span lang="EN-US"><a href="https://sites.google.com/site/andpru/" target="_blank"> Prusznski </a>(Western, </span><span>Physiology and Pharmacology, Psychology): <br></span></div><br>Title: Edge orientation processing in first-order tactile neurons (paper attached)<br></div>
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<div>Abstract:</div>
A fundamental feature of first-order neurons in the tactile system
is that their distal axon branches in the skin and forms many
transduction sites, yielding complex receptive fields with many highly
sensitive zones. The functional consequences of this
spatial arrangement are unknown. In this talk, I will describe our
recent findings, based on single neuron recordings in humans, that this
complex spatial arrangement constitutes a peripheral neural mechanism
that allows individual neurons to signal geometric
features of touched objects. I will first show that two types of
first-order tactile neurons that densely innervate the glabrous skin of
the human fingertips (fast-adapting type 1 and slow-adapting type 1)
signal edge orientation via both the intensity and
the temporal structure of their responses. I will then describe
computational work showing that a neuron’s sensitivity to edge
orientation can be readily predicted from the spatial layout of its
highly sensitive zones. Taken together, these findings reveal
that peripheral touch neurons, like peripheral visual neurons, perform
feature extraction computations typically attributed to neurons in the
central nervous system. Rather than merely conveying a simple
representation of the stimulus to the central nervous
system for further processing, we submit that peripheral neurons in
both modalities may have evolved to extract and signal specific
geometric features.<br><br></div>Andrew's work has garnered lots of attention and we are very pleased to have him visit and share his insights with us. We have booked a larger room (LHS 1621) and hope many of our colleagues across campus can attend. <br><br>As Andrew is a recent hire at Western University, I have also asked him to reflect on his training and job search experiences:<b> an excellent professional development opportunity and reason for many graduate students and postdocs to attend.</b> <br><br>If anyone would like to arrange to meet with Andrew outside of his talk please contact him at <a href="mailto:andrew.pruszynski@uwo.ca">andrew.pruszynski@uwo.ca</a><br><div class=""><br></div><div class="">Hope to see many of you there!<br><br></div><div class="">Michael<br></div><div><div><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div>Michael Barnett-Cowan, PhD<br>Assistant Professor of Neuroscience<br>Department of Kinesiology <br>University of Waterloo<br>200 University Avenue West<br>Waterloo, Ontario, Canada, N2L 3G1<br></div>p: +1.519.888.4567 x39177<br></div>f: +1.519.746.6776<br><div><div>e: <a href="mailto:mbc@uwaterloo.ca" target="_blank">mbc@uwaterloo.ca</a><br>w: <a href="https://sites.google.com/site/mbarnettcowan" target="_blank">https://sites.google.com/site/mbarnettcowan</a><br>t: <a href="https://twitter.com/#%21/multisensebrain" target="_blank">https://twitter.com/#!/multisensebrain</a></div></div></div></div>
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