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Single-trial event-related potentials and autonomic measures of the orienting reflex

Journal Article


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Abstract


  • We aimed to clarify the event-related potentials (ERPs) associated with elicitation and habituation of the

    basic Orienting Reflex (OR). Participants were presented with 16 innocuous tones, alternating in intensity,

    at long variable inter-stimulus intervals, with no task. This allowed us to examine stimulus novelty and intensity

    effects in the absence of stimulus-related task demands. Single-trial ERPs were extracted to obtain estimates

    of the early N1 and the late positive complex (LPC) to each stimulus. Electrodermal responses showed

    substantial main effects of trials and intensity, supporting their functionality as an OR index. Cardiac deceleration

    showed no systematic change with intensity or trials, suggesting that it marks the transient onset of

    each stimulus, early in the stimulus-processing sequence. Respiratory pause showed a substantial main effect

    of trials but no intensity effect, suggesting that it reflects an intermediate processing stage. A main effect of

    intensity, but no simple trial effect, was apparent in the N1, suggesting that it reflects a different intermediate

    processing stage. The subsequent LPC showed only a topographic interaction with trials and intensity, failing

    to support any substantive role in OR processing. These different stimulus–response profiles are discussed in

    the context of a sequential processing model of the OR.

Authors


  •   MacDonald, Brett (external author)
  •   Barry, Robert J.
  •   Rushby, Jacqueline A. (external author)

Publication Date


  • 2012

Citation


  • MacDonald, B., Barry, R. J. & Rushby, J. A. (2012). Single-trial event-related potentials and autonomic measures of the orienting reflex. International Journal of Psychophysiology, 83 (1), 79-86.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2192&context=hbspapers

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/1143

Number Of Pages


  • 7

Start Page


  • 79

End Page


  • 86

Volume


  • 83

Issue


  • 1

Place Of Publication


  • http://www.ulrichsweb.com.ezproxy.uow.edu.au/ulrichsweb/Search/fullCitation.asp?navPage=1&tab=1&serial_uid=143380&issn=01678760#

Abstract


  • We aimed to clarify the event-related potentials (ERPs) associated with elicitation and habituation of the

    basic Orienting Reflex (OR). Participants were presented with 16 innocuous tones, alternating in intensity,

    at long variable inter-stimulus intervals, with no task. This allowed us to examine stimulus novelty and intensity

    effects in the absence of stimulus-related task demands. Single-trial ERPs were extracted to obtain estimates

    of the early N1 and the late positive complex (LPC) to each stimulus. Electrodermal responses showed

    substantial main effects of trials and intensity, supporting their functionality as an OR index. Cardiac deceleration

    showed no systematic change with intensity or trials, suggesting that it marks the transient onset of

    each stimulus, early in the stimulus-processing sequence. Respiratory pause showed a substantial main effect

    of trials but no intensity effect, suggesting that it reflects an intermediate processing stage. A main effect of

    intensity, but no simple trial effect, was apparent in the N1, suggesting that it reflects a different intermediate

    processing stage. The subsequent LPC showed only a topographic interaction with trials and intensity, failing

    to support any substantive role in OR processing. These different stimulus–response profiles are discussed in

    the context of a sequential processing model of the OR.

Authors


  •   MacDonald, Brett (external author)
  •   Barry, Robert J.
  •   Rushby, Jacqueline A. (external author)

Publication Date


  • 2012

Citation


  • MacDonald, B., Barry, R. J. & Rushby, J. A. (2012). Single-trial event-related potentials and autonomic measures of the orienting reflex. International Journal of Psychophysiology, 83 (1), 79-86.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2192&context=hbspapers

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/1143

Number Of Pages


  • 7

Start Page


  • 79

End Page


  • 86

Volume


  • 83

Issue


  • 1

Place Of Publication


  • http://www.ulrichsweb.com.ezproxy.uow.edu.au/ulrichsweb/Search/fullCitation.asp?navPage=1&tab=1&serial_uid=143380&issn=01678760#