English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Contribution of Vestibular Information to Perceived Walking Speed

Frissen, I., & Souman, J. (2007). Contribution of Vestibular Information to Perceived Walking Speed. Poster presented at 10th Tübinger Wahrnehmungskonferenz (TWK 2007), Tübingen, Germany.

Item is

Files

show Files

Locators

show
hide
Description:
-
OA-Status:

Creators

show
hide
 Creators:
Frissen, I1, 2, Author           
Souman, JL1, 2, Author           
Affiliations:
1Research Group Multisensory Perception and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497806              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

Content

show
hide
Free keywords: -
 Abstract: Although the vestibular system clearly plays an important role in the control of locomotion,
it is not clear to what extent it is also involved in the perception of our own locomotion. We
investigated whether vestibular information is used for the perceptual estimation of one’s own
walking speed. If vestibular information is used, perceived walking speed would be expected
to be lower during walking in place on a treadmill than when walking at the same speed across
the ground, as the forward acceleration of the head during walking is largely absent. To experimentally
address this hypothesis, we used a circular treadmill setup, consisting of a large
turn table (diameter 3.5m) and a motorized handlebar. Both could be actuated independently
from each other. In this setup, walking behind the moving handlebar on the stationary treadmill
stimulates both the otholiths and the semicircular canals, whereas this vestibular stimulation is
much reduced when walking in place on the rotating treadmill. The biomechanical information
is largely equal in these two conditions. Subjects had to judge their walking speed in a 2IFC
task. In one interval, they walked around the stationary treadmill behind the moving handlebar
at one of three standard speeds (31.7, 42.3, and 52.8 deg/s at a radius of 1.28 m, corresponding
to tangential speeds of 0.71, 0.94, and 1.18 m/s, respectively). In the other interval, they
walked in place at one of nine test speeds. Their task was to indicate in which of the two intervals
they walked faster. Accelerations (20–30 deg/s) as well as the duration of the walking
period (3–4 sec) were randomly set for individual intervals. A psychometric curve was fitted to
the speed judgments for each standard speed, from which the PSEs were estimated. The results
were in general agreement with the hypothesis. Subjects tended to underestimate their walking
speed when walking in place relative to actually walking around. This underestimation, however,
seems to be dependent on walking speed and varies considerably across participants. In
conclusion, vestibular information is used for estimating perceived walking speed.

Details

show
hide
Language(s):
 Dates: 2007-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: BibTex Citekey: 4857
 Degree: -

Event

show
hide
Title: 10th Tübinger Wahrnehmungskonferenz (TWK 2007)
Place of Event: Tübingen, Germany
Start-/End Date: 2007-07-27 - 2007-07-29

Legal Case

show

Project information

show

Source 1

show
hide
Title: 10th Tübinger Perception Conference: TWK 2007
Source Genre: Proceedings
 Creator(s):
Bülthoff, HH1, Editor           
Chatziastros, A1, Editor           
Mallot, H, Editor           
Ulrich, R, Editor
Affiliations:
1 Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797            
Publ. Info: Kirchentellinsfurt, Germany : Knirsch
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 76 Identifier: ISBN: 3-927091-77-4