Vestibular perception and action employ qualitatively different mechanisms. II. VOR and perceptual responses during combined TiltTranslation

To compare and contrast the neural mechanisms that contribute to vestibular perception and action, we measured vestibuloocular reflexes (VOR) and perceptions of tilt and translation. We took advantage of the well-known ambiguity that the otolith organs respond to both linear acceleration and tilt with respect to gravity and investigated the mechanisms by which this ambiguity is resolved. A new motion paradigm that combined roll tilt with inter-aural translation ("Tilt&Translation") was used; subjects were sinusoidally (0.8 Hz) roll tilted but with their ears above or below the rotation axis. This paradigm provided sinusoidal roll canal cues that were the same across trials while providing otolith cues that varied linearly with ear position relative to the earth-horizontal rotation axis. We found that perceived tilt and translation depended on canal cues, with substantial roll tilt and inter-aural translation perceptions reported even when the otolith organs measured no inter-aural force. These findings match internal model predictions that rotational cues from the canals influence the neural processing of otolith cues. We also found horizontal translational VORs that varied linearly with radius; a minimal response was measured when the otolith organs transduced little or no inter-aural force. Hence, the horizontal translational VOR was dependent on otolith cues but independent of canal cues. These findings match predictions that translational VORs are elicited by simple filtering of otolith signals. We conclude that internal models govern human perception of tilt and translation at 0.8 Hz and that high-pass filtering governs the human translational VOR at this same frequency.
Publisher
AMER PHYSIOLOGICAL SOC
Issue Date
2005-07
Language
ENG
Keywords

GRAVITO-INERTIAL CUES; OTOLITH-OCULAR REFLEXES; VESTIBULOOCULAR REFLEX; SQUIRREL-MONKEY; ECCENTRIC ROTATION; EYE-MOVEMENTS; LINEAR ACCELERATION; SPATIAL ORIENTATION; SEMICIRCULAR CANALS; RHESUS-MONKEYS

Citation

JOURNAL OF NEUROPHYSIOLOGY, v.94, no.1, pp.199 - 205

ISSN
0022-3077
DOI
10.1152/jn.00905.2004
URI
http://hdl.handle.net/10203/1857
Appears in Collection
ME-Journal Papers(저널논문)
  • Hit : 467
  • Download : 16
  • Cited 0 times in thomson ci
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡClick to seewebofscience_button
⊙ Cited 80 items in WoSClick to see citing articles inrecords_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0