Precision and accuracy of the subjective haptic vertical in the roll plane.

BMC Neuroscience
Jeanine R SchulerAlexander A Tarnutzer

Abstract

When roll-tilted, the subjective visual vertical (SVV) deviates up to 40 degrees from earth-vertical and trial-to-trial variability increases with head roll. Imperfections in the central processing of visual information were postulated to explain these roll-angle dependent errors. For experimental conditions devoid of visual input, e.g. adjustments of body posture or of an object along vertical in darkness, significantly smaller errors were noted. Whereas the accuracy of verticality adjustments seems to depend strongly on the paradigm, we hypothesize that the precision, i.e. the inverse of trial-to-trial variability, is less influenced by the experimental setup and mainly reflects properties of the otoliths. Here we measured the subjective haptic vertical (SHV) and compared findings with previously reported SVV data. Twelve healthy right-handed human subjects (handedness assessed based on subjects' verbal report) adjusted a rod with the right hand along perceived earth-vertical during static head roll-tilts (0-360 degrees , steps of 20 degrees ). SHV adjustments showed a tendency for clockwise rod rotations to deviate counter-clockwise and for counter-clockwise rod rotations to deviate clockwise, indicating hysteresis. Clockwis...Continue Reading

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Citations

Oct 12, 2012·Experimental Brain Research·A A TarnutzerD S Zee
Mar 29, 2013·Experimental Brain Research·A A TarnutzerD Straumann
Sep 25, 2012·BMC Neuroscience·Alexander A TarnutzerDominik Straumann
Nov 10, 2013·PloS One·Alexander A TarnutzerSarah Marti
Feb 20, 2016·Journal of Vestibular Research : Equilibrium & Orientation·Amir KheradmandAdrian Lasker
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Nov 10, 2017·Frontiers in Neurology·Amir Kheradmand, Ariel Winnick
Feb 6, 2017·Journal of Neurophysiology·Bryan K WardAlexander Andrea Tarnutzer
Apr 11, 2018·Experimental Brain Research·Nikoleta AntoniadouEythimios Samoladas
Mar 24, 2012·Journal of Neurophysiology·Alexander A TarnutzerDominik Straumann
Dec 30, 2014·Journal of Neurophysiology·Torin K ClarkLaurence R Young
Dec 23, 2017·Frontiers in Neuroscience·Luigi F Cuturi, Monica Gori
Feb 18, 2020·Journal of Vestibular Research : Equilibrium & Orientation·A WedtgrubeA A Tarnutzer
Jun 19, 2018·Frontiers in Neurology·W Pieter MedendorpLuc P J Selen
May 28, 2019·Frontiers in Neurology·Carla ThürBigna Lenggenhager
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May 27, 2016·Journal of Neurophysiology·A DrakulA A Tarnutzer
Jun 5, 2021·Neuroscience·Ana Diaz-Artiles, Faisal Karmali
Jul 15, 2021·Somatosensory & Motor Research·A NedelkouG Grouios

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