Spatiotemporal Patterns of Contact Across the Rat Vibrissal Array During Exploratory Behavior

Frontiers in Behavioral Neuroscience
Jennifer A HobbsMitra J Z Hartmann

Abstract

The rat vibrissal system is an important model for the study of somatosensation, but the small size and rapid speed of the vibrissae have precluded measuring precise vibrissal-object contact sequences during behavior. We used a laser light sheet to quantify, with 1 ms resolution, the spatiotemporal structure of whisker-surface contact as five naïve rats freely explored a flat, vertical glass wall. Consistent with previous work, we show that the whisk cycle cannot be uniquely defined because different whiskers often move asynchronously, but that quasi-periodic (~8 Hz) variations in head velocity represent a distinct temporal feature on which to lock analysis. Around times of minimum head velocity, whiskers protract to make contact with the surface, and then sustain contact with the surface for extended durations (~25-60 ms) before detaching. This behavior results in discrete temporal windows in which large numbers of whiskers are in contact with the surface. These "sustained collective contact intervals" (SCCIs) were observed on 100% of whisks for all five rats. The overall spatiotemporal structure of the SCCIs can be qualitatively predicted based on information about head pose and the average whisk cycle. In contrast, precise s...Continue Reading

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Citations

Jan 18, 2007·PLoS Biology·Samar B MehtaDavid Kleinfeld
Oct 14, 2011·Journal of Biomechanics·Brian W QuistMitra J Z Hartmann
Sep 16, 2016·Current Opinion in Neurobiology·Nicholas E BushMitra Jz Hartmann
Nov 25, 2016·Journal of Neurophysiology·Hayley M BelliMitra J Z Hartmann
Apr 1, 2016·The Journal of Experimental Biology·Yan S W YuMitra J Z Hartmann
Aug 15, 2019·Journal of Neurophysiology·Valerie Ego-StengelDaniel E Shulz
Jul 25, 2019·Nature Neuroscience·Keven J Laboy-JuárezDaniel E Feldman
Jun 10, 2020·Soft Robotics·David W CollinsonLynda Catherine Brinson
Feb 28, 2019·Journal of Neurophysiology·Anne En-Tzu YangMitra J Z Hartmann
Feb 3, 2021·Bioinspiration & Biomimetics·Yani JiangYiXiang Bian
Aug 7, 2021·Proceedings of the National Academy of Sciences of the United States of America·Nicholas E BushMitra J Z Hartmann

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