TY - JOUR
T1 - The vestibular system modulates the contributions of head and torso to egocentric spatial judgements
AU - Ferrè, Elisa R.
AU - Alsmith, Adrian J.T.
AU - Haggard, Patrick
AU - Longo, Matthew R.
N1 - Funding Information:
This research was supported by grants from the Volkswagen Stiftung to AJTA and MRL and from the European Research Council (ERC-2013-StG-336050) to MRL. AJTA was additionally supported by ERC-2017-STG (757698). ERF and PH were supported by European Union Seventh Framework Programme (EU FP7) project VERE WP1. PH was additionally supported by a Professorial Fellowship from the ESRC and by ERC Advanced Grant HUMVOL.
Publisher Copyright:
© 2021, The Author(s).
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/7
Y1 - 2021/7
N2 - Egocentric representations allow us to describe the external world as experienced from an individual’s bodily location. We recently developed a novel method of quantifying the weight given to different body parts in egocentric judgments (the Misalignment Paradigm). We found that both head and torso contribute to simple alter-egocentric spatial judgments. We hypothesised that artificial stimulation of the vestibular system would provide a head-related signal, which might affect the weighting given to the head in egocentric spatial judgments. Bipolar Galvanic Vestibular Stimulation (GVS) was applied during the Misalignment Paradigm. A Sham stimulation condition was also included to control for non-specific effects. Our data show that the weight given to the head was increased during left anodal and right cathodal GVS, compared to the opposite GVS polarity (right anodal and left cathodal GVS) and Sham stimulation. That is, the polarity of GVS, which preferentially activates vestibular areas in the right cerebral hemisphere, influenced the relative weightings of head and torso in egocentric spatial judgments.
AB - Egocentric representations allow us to describe the external world as experienced from an individual’s bodily location. We recently developed a novel method of quantifying the weight given to different body parts in egocentric judgments (the Misalignment Paradigm). We found that both head and torso contribute to simple alter-egocentric spatial judgments. We hypothesised that artificial stimulation of the vestibular system would provide a head-related signal, which might affect the weighting given to the head in egocentric spatial judgments. Bipolar Galvanic Vestibular Stimulation (GVS) was applied during the Misalignment Paradigm. A Sham stimulation condition was also included to control for non-specific effects. Our data show that the weight given to the head was increased during left anodal and right cathodal GVS, compared to the opposite GVS polarity (right anodal and left cathodal GVS) and Sham stimulation. That is, the polarity of GVS, which preferentially activates vestibular areas in the right cerebral hemisphere, influenced the relative weightings of head and torso in egocentric spatial judgments.
KW - Egocentric representation
KW - Galvanic vestibular stimulation
KW - Misalignment paradigm
KW - Multisensory integration
KW - Vestibular system
UR - http://www.scopus.com/inward/record.url?scp=85107187701&partnerID=8YFLogxK
U2 - 10.1007/s00221-021-06119-3
DO - 10.1007/s00221-021-06119-3
M3 - Article
AN - SCOPUS:85107187701
SN - 0014-4819
VL - 239
SP - 2295
EP - 2302
JO - Experimental Brain Research
JF - Experimental Brain Research
IS - 7
ER -